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Bioresource Technology Reports
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Online) 2589-014X
Published by Elsevier Homepage  [3161 journals]
  • Initial population density plays a vital role to enhance biodiesel
           productivity of Tetraselmis sp. under reciprocal nitrogen concentration
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): S. Dinesh Kumar, Kwang-Min Ro, P. Santhanam, B. Dhanalakshmi, S. Latha, Mi-Kyung KimAbstractThis study reveal the combined effect of initial population density (IPD) (0.1, 0.5 and 1.0 g L−1) and nitrogen (0 N-nil nitrogen; 1 N-optimized concentration of nitrogen; 2 N–doubling of optimized nitrogen concentration) on growth, biomass, lipid and fatty acid content of the oceanic microalga Tetraselmis sp. were tested. The experiment was carried out in multi-room light-emitting diode chamber for two weeks with continuous illumination of light such as 14:10 h L:D of photoperiod (PP) and 150 μmol m−2 s−1 of photosynthetic photon flux intensity (PPFI). The maximum optical density (1.15 abs), cells concentration (253 × 104 cells mL−1), chlorophyll ‘a’ (2.68 mg L−1) and fatty acids content were found in the combination of 0.5 g L−1 initial population density and 1 N, whereas the highest biomass (0.95 g L−1) was noticed in 1 g L−1 initial population density and 2 N, and total lipid (48 ± 1.14%) was high in 0.5 g L−1 initial population density and 2 N combination.
       
  • Characterization of electrochemical behaviour of Escherichia coli MTCC
           1610 in a microbial fuel cell
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Reeshab Goenka, Suparna Mukherji, Prakash C. GhoshMicrobial fuel cells have intrigued the research community as a promising technology for wastewater remediation and simultaneous energy production. Reducing the catalyst loading and matching the rates of the half reactions is important towards achieving feasibility for scale-up. In this study, a novel 3-cathode membrane electrode assembly with varying platinum loadings on the cathode side in a segmented electrode is used in the same single chamber microbial fuel cell with a common anode in order to match the oxygen reduction reaction kinetics with the microbial charge transfer kinetics on the anode. The electrochemical characteristics of a specific microbe used at the anode – Escherichia coli MTCC 1610 – is studied by Electrochemical Impedance Spectroscopy and reported as equivalent to Pt loading of 0.032 ± 0.003 mg-cm−2 on the cathode. It also exhibits an equivalent exchange current per unit cell count of 1.6 × 10−13 ± 2.7 × 10−14 mA-CFU−1. The maximum power and current obtained are 40.44 mW-m−2 and 235.05 mA-m−2 respectively.Graphical abstractUnlabelled Image
       
  • Use of sulfur-oxidizing bacteria enriched from sewage sludge to
           biologically remove H2S from biogas at an industrial-scale biogas plant
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Yanfei Cheng, Tian Yuan, Yang Deng, Cong Lin, Jianhua Zhou, Zhongfang Lei, Kazuya Shimizu, Zhenya ZhangAbstractAnaerobic digestion has been widely used for organic waste and wastewater treatment to produce renewable energy, especially biogas. Hydrogen sulfide (H2S) being harmful to human beings and the environment is one of the highly toxic compounds in the biogas. For the sake of health and safety, removal of H2S from biogas is necessary before further utilization. In this study, sewage sludge was used to enrich sulfur-oxidizing bacteria (SOB) quickly under weak alkaline condition (pH = 7.5–8.2) in the laboratory and then applied in an industrial-scale desulfurization system. The SOB was successfully enriched in the system within 10 days by addition of Na2S. The optimal dissolved oxygen (DO) for producing elemental surfer (S0) in the regeneration tank was 0.8–1.2 mg/L. The performance shows that the outlet H2S concentration could be reduced to the safety limit of 200 ppm after 2 months' operation, achieving a stable H2S removal up to 95%.
       
  • A novel way of assessing C dynamics during urban organic waste composting
           and greenhouse gas emissions in tropical region
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): R.F. Pereira, E.J.B.N. Cardoso, F.C. Oliveira, G.A. Estrada-Bonilla, C.E.P. CerriAbstractComposting process is considered one of the main sustainable methods for treatment of the organic waste from urban centers. Our study aimed to evaluate the decomposing dynamics and the environmental conditions during urban waste composting measuring the temperature, pH and microbial activity. We also decided to follow the carbon and nitrogen dynamics by physical fractionation and determined greenhouse gas emissions. During composting, C accumulation in the heavy fraction indicated that a great and intimate association of C with minerals had occurred in the pile together with microbial or chemical decomposition. This is a novel way to determine how great amounts of OM are maintained in the mature compost and its structure, including the main reason for the great stabilization of the organic matter during the composting process. The emissions analysis showed methane as the most environmentally impacting greenhouse gas during urban waste composting.
       
  • Contribution of specific impurities in crude glycerol towards improved
           lipid production by Rhodosporidium toruloides ATCC 10788
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Bijaya K. Uprety, Mahdieh Samavi, Sudip K. RakshitAbstractThe use of crude glycerol doubled the biomass and tripled the lipid concentration obtained using Rhodosporidium toruloides ATCC 10788, compared to pure glycerol. Methanol in crude glycerol severely affected the biomass and lipid obtained from this strain. However, it was tolerant to salt levels of 1.5% (w/v) in the media. Soap and FAME present in crude glycerol had a positive influence on biomass and lipid production. This strain also has the unique capacity to consume soap as a carbon source. While growing on 3.5% (w/v) of soap as the sole carbon substrate, 12.87 g/L of biomass and 5.40 g/L of lipid were obtained at the end of 168 h. This study also helped us ascertain the reason for such a large improvement in biomass and lipid when crude glycerol containing large quantities of soap (32.97 wt%) was used.
       
  • Production of compounds by phytopathogenic fungi for biological control of
           aquatic macrophytes
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Cristiano Daniel Moreira, Thamarys Scapini, Siliandra Muller, Jéssica Amroginski, Simone Golunski, Leonardo Pandolfi, Leandro Galon, Rodrigo Josemar Seminoti Jacques, Nariane de Andrade, Caroline Borges Bevilacqua, Márcio Antônio Mazutti, Gislaine Fongaro, Altemir J. Mossi, Helen TreichelAbstractThe intense urbanization and use of natural resources has been causing disturbances in the aquatic ecosystem, such as the disorderly and dense increase of macrophytes, such as Eichhornia crassipes, Pistia stratiotes and Salvinia herzogii. In this context, we aim to evaluate the biological control of these plants by the production of phytopathogenic fungi compounds isolated from the foliar lesions of the plants collected. The microorganisms were isolated and identified as Aspergillus flavus and Aspergillus miniscleroti. Afterwards, an experimental design was developed and the results showed that temperature and glucose concentration were determinant in biomass production, being the largest biomass obtained 26.12 g/L and 45.95 g/L for A. flavus and A. miniscleroti, respectively. The application of the compounds in the plants showed satisfactory results, presenting toxicity potential in macrophytes, with a maximum deterioration of 88–94% for macrophytes E. crassipes.
       
  • Extraction of arabinoxylan from corncob through modified alkaline method
           to improve xylooligosaccharides synthesis
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Pranati Kundu, Sandeep Kumar, Vivek Ahluwalia, Sushil K. Kansal, Sasikumar ElumalaiAbstractA modified alkaline protocol involving a combination of NaOH and NH4OH was employed for the isolation of hemicellulose from corncob. It was possible to obtain a hemicellulose fraction consisted of nominal branching constituents, such as arabinose, uronic acid and lignin. During the extraction of hemicellulose, alkaline reagents promoted selective cleavage of ester and ether linkages in corncob biomass depending on its nature and severity. Based on modeling analysis, reaction parameters, such as alkali concentration and temperature significantly influenced the amount of total hemicellulose extracted. Subsequent hydrolysis of isolated hemicellulose in the presence of H2SO4 resulted in better conversion (69 wt%) with enriched XOs conc. (73.68% with DP up to 4) than other fractions under milder conditions. Advantageously, gas phase NH3 formation was achieved during the reaction, where NaOH and NH4OH mix was used at an equal ratio that could significantly help in reducing the overall processing cost of XOs production (through recovery and reuse) during large-scale manufacture.
       
  • Optimisation of organosolv pretreatment for the extraction of polyphenols
           from spent coffee waste and subsequent recovery of fermentable sugars
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Rajeev Ravindran, Claire Desmond, Swarna Jaiswal, Amit K. JaiswalAbstractIn the present study, organosolv pretreatment strategy was modified for the comprehensive utilisation of spent coffee waste (SCW) for polyphenol extraction and reducing sugar production. A response surface design involving four factors viz. ethanol concentration, temperature, time and H2SO4 concentration was created for optimisation of polyphenol extraction from SCW. 11.2 mg GAE of polyphenol content/g of SCW was obtained using ethanol (68% v/v) at 51 °C for 45 min in the presence of 1.5% H2SO4 as catalyst. Furthermore, 13.78 of QE of Total Flavonoid Content/g of SCW was obtained following this process which was 7.6-fold higher than control (1.81 QE/g of SCW). Lignin removal of 24.4% was achieved following modified organosolv protocol. Enzymatic hydrolysis of pretreated SCW yielded 29.05 mg/g of total reducing sugar, which was 1.27-fold higher than control (22.8 mg/g). XRD, FTIR, and DSC profiles of the pretreated substrates were analysed for various changes incurred in pretreated SCW.
       
  • Zinc oxide phytase nanocomposites as contributory tools to improved
           thermostability and shelflife
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Sharrel Rebello, A.N. Anoopkumar, Sreedev Puthur, Raveendran Sindhu, Parameswaran Binod, Ashok Pandey, Embalil Mathachan AneeshAbstractThe current study suggests the utility of ZnO nanoparticles to increase the thermotolerance of phytase enzymes; thereby aiding their effective utilization to provide better phosphate uptake when applied in animal feeds. Microbial isolates with predominant phytase activity were isolated from industrial wastewater to obtain a promising thermotolerant isolate of Penicillium decumbens. The purified phytase showed activities at mash preparatory temperature (32.59 ± 0.045 Uml−1 min−1 at 55 °C), animal feed pelletising temperature (37.83 ± 0.127 Uml−1 min−1 at 80 °C) and steam sterilization temperature (18.56 ± 0.027 Uml−1 min−1 at 100 °C) of animal feeds as per standard phytase assays. The supplementation of ZnO nanoparticles found to increase thermostability of phytase from 18.56 Uml−1 min−1 to 30.5 Uml−1 min−1 at 100 °C. The antibacterial role of the nanocomposites was checked against human pathogens to obtain satisfactory results against standard antibiotics. Thus the incorporation of ZnO nanoparticles in combination with phytase provided a dual benefit of increasing its thermostability and antimicrobial property thereby increasing its shelflife.
       
  • Biochemical and proteomic characterization of Paenibacillus sp. ISTP10 for
           its role in plant growth promotion and in rhizostabilization of cadmium
    • Abstract: Publication date: September 2018Source: Bioresource Technology Reports, Volume 3Author(s): Moni Kumari, Indu Shekhar ThakurAbstractThe plant growth promoting potential of Paenibacillus sp. ISTP10 was evaluated by biochemical assays and LC-MS/MS based proteomic analysis. The biochemical characterization showed that the strain possesses characters like N2 fixation, phosphorous solubilization (238 ± 4.78 μg/ml), production of ammonia, HCN, IAA (172.95 ± 2 μg/ml), EPS (125.74 ± 2.18 μg/ml) and siderophores. The proteomic analysis indicated the list of proteins involved in N and P metabolism, siderophores production, biocontrol activities and xenobiotic degradation were also expressed. The stain also showed resistance against Cd, Cr, Cu, Ni and Zn with MIC values of 1.8, 0.36, 2.5, 1.8 and 3.3 mM respectively. An in vivo system for studying the resistance response of cotton in Cd stressed soil showed reduced phytotoxicity and decrease in accumulation of Cd in root, shoots and leaves by 40.00%, 32.26% and 35.30% respectively, and increase in total chlorophyll content, plant height, root length, plant fresh weight, plant root and shoot fresh weight and plant dry weight.
       
  • Performance of novel biosorbents prepared using native and NaOH treated
           Peltophorum pterocarpum fruit shells for the removal of malachite green
    • Abstract: Publication date: Available online 7 July 2018Source: Bioresource Technology ReportsAuthor(s): S. Rangabhashiyam, P. BalasubramanianAbstractThe Peltophorum pterocarpum fruit shells were treated with sodium hydroxide, employed for the malachite green biosorption. Biosorbents characterization conducted using the Environmental Scanning Electron Microscopy and X-ray Diffractometer. The MG removal performance was evaluated in a batch biosorption system by varying the process parameters. The biosorption data modeled using the Langmuir, Freundlich, Tempkin, Halsey and Jovanovic isotherm models. The Langmuir model superior explained the equilibrium data among the isotherms considered in the current investigation. The maximum uptake capacity of 62.50 mg/g was observed for sodium hydroxide treated biomass, whereas native biosorbent showed 40.00 mg/g. The kinetic modeling of the experimental data revealed that the better fit of the pseudo-second-order kinetic model and suggested the mechanism of chemisorption. MG biosorption using sodium hydroxide treated biomass of enthalpy with positive values indicates endothermic and Gibbs free energy of negative values represented spontaneous nature.
       
  • Production of siderophores by the bacterium Kosakonia radicincitans and
           its application to control of phytopathogenic fungi
    • Abstract: Publication date: Available online 3 July 2018Source: Bioresource Technology ReportsAuthor(s): Yesica Lambrese, María Guiñez, Viviana Calvente, Gabriela Sansone, Soledad Cerutti, Julio Raba, María Isabel SanzAbstractThe present work aimed to characterize and to improve the production of the siderophore produced by Kosakonia radicincitans and apply it to control of phytopathogenic fungi. The siderophore, characterized by liquid chromatography coupled to tandem mass detection (LC-MS/MS), was identified as enterochelin. The improvement of its production was carried out using different conditions. The higher production of enterochelin (45 mg g−1 dry weight biomass) was reached in a medium with lactose as the carbon source, 0.82 μmol L−1 of iron, at 28 °C and 200 rpm. The siderophore at 60 mg L−1 of concentration inhibited the conidia germination and the mycelial growth of Penicillium expansum, Botrytis cinerea, Rhizopus sp., Alternaria sp. and Cladosporium cladosporioides. Biocontrol of Botrytis cinerea and Penicillium expansum were performed in apple fruit using Kosakonia radicincitans and enterochelin, alone or in a mixture. The mixture was the more effective. In this case, the reduction of decay provoked for B. cinerea reached 52%.
       
  • Process constraints in sustainable bio-hythane production from wastewater:
           Technical note
    • Abstract: Publication date: Available online 20 June 2018Source: Bioresource Technology ReportsAuthor(s): Santhana Krishnan, Mohd Fadhil Md Din, Shazwin Mat Taib, Yong Ee Ling, Hafiz Puteh, Puranjan Mishra, Mohd Nasrullah, Mimi Sakinah, Zularisam A. Wahid, Supriyanka Rana, Lakhveer SinghAbstractThe economy of an industrialized country is greatly dependent on fossil fuels. However, these non-renewable sources of energy are nearing the brink of extinction and which have caused serious adverse impacts on the environment. Hydrogen has emerged as a promising alternative and also has the highest calorific value. Bio-hythane is a hydrogen-methane blend can be produced from different organic substrates by two sequential anaerobic stages: a dark fermentation step followed by a second an anaerobic digestion step, for hydrogen and methane production, respectively. Bio-hythane is considered to be promising approach in sustainable energy sector. The advantages of two-stage technology include; high organic removal, high energy recovery and environment friendly. However, current efforts to recover bio-hythane energy from waste are still at bench scale level. The technical constraints in the fermentation must be removed for the indispensable bio-hythane recovery from waste. This short technical note highlights the two-stage fermentation and the technical barriers to be addressed for bio-hythane scale up from waste.
       
  • Enhanced ethyl levulinate production from citrus peels through an in-situ
           hydrothermal reaction
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Jeongwoo Yang, Jeongseok Park, Jeesung Son, Bora Kim, Jae W. LeeAbstractThis study introduced the enhanced production of ethyl levulinate (EL) by using waste citrus peels and verified the positive roles of the moisture of the biomass in producing EL. The effects of various parameters on the EL production were investigated. The optimal conditions for EL production were reaction temperature 150 °C, acid volume 0.2 ml, co-solvent 2 ml, and ethanol 2 ml based on 0.3 g of dry biomass with a moisture content of 50 wt%. Under these conditions, the EL yield was 27.81 wt% based on a dry feedstock. This is significantly high compared to previous studies that produced EL from other cellulosic materials because the co-solvent forms a miscible phase with EL, facilitating mass transfer of the EL to the co-solvent phase to promote the forward reaction and inhibit the side reaction.
       
  • Hydrothermal carbonization as an all-inclusive process for
           food-waste conversion
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Simon B. Tradler, Siegfried Mayr, Markus Himmelsbach, Reinhold Priewasser, Werner Baumgartner, Anna T. StadlerFood waste is highly energetic biomass but its recycling and disposal process is costly and time-intensive, and the wet, inhomogeneous waste is unwelcome in biomass plants. Searching for an alternative processing pathway, we studied the feasibility of a decentralized, small-scale hydrothermal carbonization plant. Restaurant food waste was converted at 200 °C for 6 h into high-quality hydrochar that has fuel qualities similar to those of lignite and which could be used for co-combustion. We successfully treated the liquid phase with ultraviolet radiation to minimize the total organic carbon and chemical oxygen demand in order to facilitate conventional disposal. Such a plant would pay for itself and begin to generate profit within eight years. We see hydrothermal carbonization in the catering industry as a sustainable and convenient solution for food-waste conversion.Graphical Graphical abstract for this article
       
  • Penicillium: The next emerging champion for cellulase production
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Neha Vaishnav, Anusuiya Singh, Mukund Adsul, Pooja Dixit, Simranjeet Kaur Sandhu, Anshu Mathur, Suresh Kumar Puri, Reeta Rani SinghaniaAbstractBio-ethanol from lignocellulosic biomass via enzymatic route has received wide acceptance as liquid fuel for transport sector. It has been regarded as alternative sustainable source of energy, however; economic feasibility still remains a question. Cellulase is still considered to add to the major cost components in the bio-ethanol production process. Trichoderma reesei, which is considered as the most potent cellulase producer is known to be deficient in β-glucosidase, hence, Penicillium cellulases being rich in β-glucosidase have got recognition. Thus Penicillium cellulases give higher efficiencies during saccharification of biomass resulting in lower cellulase requirement; decreasing the cost of cellulases in the process. This review gives an account of cellulases produced from Penicillium and its superiority over existing cellulase champions. It also discusses the possible targets to improve cellulase secretion from Penicillium at genetic level. This article justifies that Penicillium could be the next champions for cellulase production for biofuel applications.
       
  • Xylooligosaccharides production by fungi cultivations in rice husk and
           their application as substrate for lactic acid bacteria growth
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Bruna da Silva Menezes, Daniele Misturini Rossi, Fabio Squina, Marco Antônio Záchia AyubAbstractWe describe a three-steps bioprocess to convert rice husk as source of xylooligosaccharides and then used these prebiotics to grow lactic acid bacteria as a model to produce probiotics from vegetal sources. First, Aspergillus brasiliensis BLf and the recombinant Aspergillus nidulans XynC A773 strains were solid-state cultivated in rice husk to produce xylanases (234.7 ± 0.01 U·g−1 and 192 ± 0.03 U·g−1 substrate, respectively). These enzymatic preparations were directly applied to rice husk to hydrolyze its hemicellulosic structure and obtain xylooligosaccharides (37.25 mg XOS·g−1 substrate and 75.92 mg XOS·g−1 substrate, respectively). Prebiotic effect of XOS was tested by cultivating probiotic strains Lactobacillus plantarum BL011 and Bifidobacterium lactis B-12, which grew in this substrate. The results in this work showed that it is possible to produce xylooligosaccharides and then proceed to use these prebiotic sugars to grow probiotic bacteria using the same agro-residue, being possible their use in food related applications.
       
  • Utilization of glycerol by Bacillus sp. ISTVK1 for production and
           characterization of Polyhydroxyvalerate
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Raj Morya, Manish Kumar, Indu Shekhar ThakurPlastic due to its light weight and low cost is a first choice for daily use product, which now can be replaced by Bioplastics. The current study demonstrates the screening of a previously reported thermotolerant bacterium strain Bacillus sp. ISTVK1 isolated from wastewater treatment plant for production of PHA by utilizing pure glycerol as carbon source. Primary screening of the selected bacterium strain was performed by Nile red staining and afterward visualization under a fluorescence microscope. Nile red fluorescence measurement of bacterial culture was also investigated based on absorbance of spectrofluorometer. GC–MS, 1H NMR, TEM, and FT-IR analysis revealed that the produced material is PHV, which is co-polymer of PHB. Optimization of process parameters was performed to enhance the production of PHA. A substantial increase in PHA production from 1.29 g/L to 4.44 g/L (85.19% of CDW) was observed after optimization of process parameters, shows the importance of optimization.Graphical abstractUnlabelled Image
       
  • Comparative analysis of banana waste bioengineering into animal feeds and
           fertilizers
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Stella Nannyonga, Fani Mantzouridou, Eleni Naziri, Kylee Goode, Peter Fryer, Phillip RobbinsAbstractThe efficiency of a bioprocess in terms of cost of production versus product output determines it pragmatism in the field of Bioengineering. Solid state fermentation (SSF) and anaerobic digestion (AD) were compared for banana waste bioprocessing using Saccharomyces cerevisiae. The wastes were pretreated by alkaline-delignification and thermal pre-treatment prior SSF and AD respectively. Optimization of the operational parameters for yeast growth kinetics was done using Chapman, Bergter and Andrew models. From the results generally, pH 3.5 to 5.8 and temperature 22 to 30 °C were optimum for both bioprocesses. Comparatively, SSF was a more economic and efficient banana waste bioprocess than AD. The protein content increased by approximately 7.9% after SSF and by 6.7% after AD and the lipid contents increased by 5.9 and 5.4%, while the mineral contents increased by 6.3 and 7.5% both after SSF and AD respectively. This suggested the possible of use of the upgraded wastes as animal feed supplements and nutrient rich fertilizers.
       
  • Hybrid pervaporation and salting-out for effective acetone-butanol-ethanol
           separation from fermentation broth
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Hao Wen, Heting Gao, Tao Zhang, Zhichao Wu, Peiwen Gong, Zhuangzhuang Li, Huidong Chen, Di Cai, Peiyong Qin, Tianwei TanAbstractIn this study, hybrid pervaporation/salting-out process was coupled with fed-batch acetone-butanol-ethanol (ABE) fermentation for high-titer solvents production. At the first-stage separation, 18.8 g/L of ethanol, 125.9 g/L of acetone and 199.5 g/L of butanol were obtained in the permeate of pervaporation. Model solution with similar solvents content to the permeate condensate was used for the second-stage salting-out process based on K3PO4 and KH2PO4, respectively. The effect of salting-out factor on ABE concentrations and recoveries in the aqueous and organic phase was compared and optimized. Results indicated that K3PO4 showed better salting-out performance. At the salting-out factor of 1.0, 99.01% of ABE was recovered. Correspondingly, 486.74 g/kg of butanol (805.52 g/kg of total ABE) could be tested in the organic phase. This novel hybrid process was a promising method for biobutanol production and separation.
       
  • Sewage sludge and food waste co-digestion to methane: A multi response and
           kinetic modeling study to evaluate the dynamics in compositional
           parameters
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Kalp Bhusan Prajapati, Rajesh SinghIron Scraps was hypothesized to enhance methane production at limited oxygen supply under co-digestion process of waste. The multi response overlay contour plots estimated the feasible region of compositional parameters dynamic for methane production. The confirmatory findings show CH4 production range 59.37 ± 0.84 to 80.07 ± 1.12 (ml/gCOD), at food waste (7.27 to 7.39%), Iron scraps (0.0 to 447.67 mg/L), and head space O2 (0.28 to 0.95%). The response dynamics observed were residual COD (2533.3 ± 126.6–4533.33 ± 22.66 mg/L), VFAs (171.42 ± 0.0–800 ± 98.9 mg/L), ammonia (173.95 ± 5.39–215.4 ± 11.5 mg/L), residual sulfate (185.63 ± 2.34–250.67 ± 19.21 mg/L) and NO3− (7.1 ± 0.66–16.38 ± 1.81 mg/L) during confirmatory experiments. The simulated values of Logistic and Exponential rise to maximum model were well suited at all level of food waste. Elevated CH4 produced showed ability to effective anaerobic co-digestion.Graphical abstractUnlabelled Image
       
  • Synthesis of sulfonated carbon catalyst from waste orange peel for cost
           effective biodiesel production
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Dharmesh R. Lathiya, Dhananjay V. Bhatt, Kalpana C. MaheriaAbstractThe present research work deals with the bio-waste valorisation approach for the catalyst development and then its use in the low cost biodiesel production. The sulfonated carbon catalyst, a solid acid is prepared from waste orange peels (WOP) through carbonization followed by sulfonation treatment. WOP is one of the bio-wastes of food industries. The developed catalyst was characterized using elemental, spectral and thermal analysis. Surface area and pore volume is measured using Brunauer, Emmett and Teller (BET) surface area analysis. The synthesized catalyst exhibits 44 m2/g surface area and 1.57 mmol/g acid density. To demonstrate the catalytic performance, the sulfonated carbon catalyst was used to esterify corn acid oil (CAO), a low cost feed stock containing 127.21 mg KOH/g acid value, to generate cost effective biodiesel. 91.68% biodiesel conversion is obtained under optimized conditions using Box-Behnken Design (BBD).
       
  • A novel method for preparing high purity Actinobacillus succinogenes stock
           and its long-term acid production in a packed bed reactor
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Yu-Sheng Chiang, Yu-Yuan Kuo, Si-Yu LiAbstractA. succinogenes is susceptible to contamination by other lactate producing bacteria. This reduces stability and makes long-term A. succinogenes fermentation difficult. In this study, the contaminated A. succinogenes culture, where the contaminant was shown to be ubiquitous Staphylococcus epidermidis, can be easily rescued by using xylose as the sole carbon source. The stability of purified A. succinogenes was verified in continuous fermentation using packed bed reactor while the performance of acid productions was investigated. While MgCO3 was used as a pH buffer and CO2 source during the continuous fermentation, the problem of MgCO3 clogging in a packed bed reactor was solved by oleyl alcohol reflux. This raised operation time from 344 to 1788 h. The provision of 30 g/L glucose and 40 g/L xylose as carbon sources resulted in a main metabolite yield of 91.7 ± 3.2% lactate and 55.3 ± 3.0% succinate with a stable productivity of 16.9 ± 1.7 and 1.5 ± 0.1 g·L−1·h−1.
       
  • Experimental validation of biochar based green Bronsted acid catalysts for
           simultaneous esterification and transesterification in biodiesel
           production
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Suchith Chellappan, Vaishakh Nair, Sajith V, Aparna KIn this study, a variety of novel biochar based Bronsted acid catalysts were prepared from low cost potential feedstocks viz., cassava peel, irul sawdust, coconut shell and their catalytic activity for biodiesel production were compared. The optimization studies of biochar generation were carried out based on the influence of pyrolysis temperature and heating duration, for the preparation of acid catalyst with superior activity. The elemental analysis, surface functional groups, thermal stability, crystallographic structure, surface morphology and pore size distribution of all biochars and its sulfonated catalysts were characterized thoroughly. The performance of the sulfonated biochar catalysts for the synthesis of biodiesel from Derris indica L. seed oil was evaluated and compared. The cassava peel biochar based catalyst with a total acid density of 2.9 mmol/g and sulfonic acid group density of 1.7 mmol/g showed the best result among the sulfonated biochar catalysts for the enhanced biodiesel production.Graphical abstractUnlabelled Image
       
  • Systematic investigation of anode materials for microbial fuel cells with
           the model organism G. sulfurreducens
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Elena Kipf, Johannes Erben, Roland Zengerle, Johannes Gescher, Sven KerzenmacherAbstractDifferent carbon and metal-based anode materials for microbial fuel cells were systematically investigated with a pure culture of the model organism G. sulfurreducens. The highest limiting current density of 756 ± 15 μA cm−2 at −0.253 ± 0.037 V vs. SCE was achieved with graphite foil using a step-wise galvanostatic technique. But also the application of completely different anode materials such as activated carbon cloth, stainless steel and graphite felt led to similar high limiting current densities, suggesting that G. sulfurreducens is able to use a large range of substantially different anode materials as external electron acceptor. Additionally, we could show that a step-wise galvanostatic technique to record polarization curves yields similar current densities as potentiostatic control at −0.400 V vs. SCE with the investigated carbon-based materials. In case of stainless steel these techniques yield slightly different results, presumably due to an effect related to the material's surface properties.
       
  • Triggering of fatty acids on Tetraselmis sp. by ethyl
           methanesulfonate mutagenic treatment
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): S. Dinesh Kumar, Kang Sojin, P. Santhanam, B. Dhanalakshmi, S. Latha, Min S. Park, Mi-Kyung KimAbstractThe present study aimed to triggering of growth, lipid and fatty acids production of oceanic microalgae Tetraselmis sp. for biofuel production under mutagenic treatment with ethyl methanesulfonate (EMS). The maximum optical density (0.51 ± 0.02), cells concentration (138 ± 6.9 × 104 cells mL−1), biomass (0.63 ± 0.03 g L−1), chlorophyll ‘a’ (3.91 ± 0.19 mg L−1) were found in DKMK06 in first generation which was treated with EMS at 50 μmol mL−1 for 60 min. DKMK06 was exhibited the highest lipid productivity (48 ± 0.9%) during first generation and DKMK05 during second and third generations and percentages of lipid were 46.5 ± 1.1 and 41 ± 1.1%. The same trend has been observed in FAME contents and highest saturated and mono unsaturated fatty acid combinations were found in DKMK05 in 2nd generation (42.49%) followed by third generation (41.5%) which were higher than the first generation produced by DKMK06 (39.98%).
       
  • Optimization of Chlorella sorokiniana cultivation condition for
           simultaneous enhanced biomass and lipid production via CO2 fixation
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Meilian Xie, Yiting Qiu, Chunfeng Song, Yun Qi, Yang Li, Yutaka KitamuraAbstractIn this work, the cultivation condition of Chlorella sorokiniana was investigated to optimize biomass and lipid production. The influence of initial biomass content, nitrogen sources and concentration, phosphorus concentration, pH and CO2 concentration was tested. The experimental results indicated that 1.0 g/L glycine could be a suitable nitrogen source for Chlorella sorokiniana. Meanwhile, KH2PO4 with the concentration of 11.4 mg/L at the pH of 9 was preferable phosphorus source for biomass and lipid accumulation. The maximum lipid concentration and content could achieve 173.73 mg/L and 44.1%. When CO2 was added as inorganic carbon source with the gas flow rate of 6 sccm, the maximum biomass concentration was 1.0 g/L on the fourth day.
       
  • Characterization of thermoadaptive serine metalloprotease and application
           in waste management
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Shritoma Sengupta, Rituparna Saha, Debalina Bhattacharya, Krishanu Chakrabarti, Mainak MukhopadhyayAbstractThermoadaptive enzymes offer new opportunities for bio-catalysis and bio-transformations owing to their ability to function over wide temperature ranges. Microbial alkaline proteases are important constituents of commercial enzyme preparations, accounting for more than 60% of the total industrial enzyme market. Fibrous proteins, such as horn, feathers etc. are abundantly available in nature as recalcitrant solid wastes. Extracellular alkaline proteases derived from microorganisms can be used for degradation of proteinaceous wastes and convert them into value-added products e.g. peptide concentrates or amino acids. The present study relates to the isolation of an extracellular, bacterial thermoadaptive serine metalloprotease from the soil. The purified protease showed a remarkable increase in thermostability (4 °C–100 °C) that was enhanced in the presence of Ca2+. The protease (+Ca2+) was utilized to efficiently degrade fish scales and feather to produce amino acids, as declogging agent and for removing blood stains from cloth with a short reaction time. The ability of the protease could be utilized in bulk for solid waste management providing for an eco-friendly and effective process.
       
  • Influence of ferrous iron dosing strategy on aerobic granulation of
           activated sludge and bioavailability of phosphorus accumulated in granules
           
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Wei Cai, Meishan Jin, Ziwen Zhao, Zhongfang Lei, Zhenya Zhang, Yasuhisa Adachi, Duu-Jong LeeAbstractTwo different Fe2+ dosing strategies (with the same daily Fe2+ dosage of 19.5 mg/d), i.e. constant (R1 with fixed 5 mg Fe/L in influent) and pulse dosing (R2 with 30 mg Fe/L in influent only during the first cycle every day) were tested in two identical reactors and their comparison was conducted on granule formation, stability and performance on pollutants removal and P accumulation. Results showed that granules appeared earlier and relatively smaller in R2 (day 9), while biomass increased faster in R1. Relatively high and stable P removal could be achieved, averagely 92% in R1 and 81% in R2. The granules in R1 accumulated more P (45.6 mg/g-SS) with higher bioavailability (95%) after 48 days' operation, especially with high non-apatite inorganic P content (36.2 mg/g-SS). This work also suggests that Fe2+ dosing strategy can be applied in conventional activated sludge processes when high bioavailable P recovery is targeted.
       
  • Evaluating the Water Quality Impacts of Hydrothermal Liquefaction
           Assessment of Carbon, Nitrogen, and Energy Recovery
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Sarah K. Bauer, Catherine F. Reynolds, Shanshan Peng, Lisa M. ColosiAbstractThis research evaluates possible water impacts arising from creation of potent wastewaters during hydrothermal liquefaction (HTL) of organic wastes. Aqueous co-products (ACPs) arising from HTL of eight feedstocks contained very high concentrations of traditional wastewater pollutants: 100–3300 mg/L total nitrogen (N), 45–3600 mg/L total phosphorus (P), and 16,000–234,000 mg/L chemical oxygen demand (COD). pH was 4.4–8.8. These characteristics render ACP more noxious than relevant benchmark wastewaters. Adjustment of published energy ratio metrics to account for ACP treatment reveals that energy yield is moderately decreased, and energy consumption for COD, TN, and TP removal is of the same order of magnitude as liquefaction. Recovery of valuable nutrients (i.e., N and P) from ACP via precipitation could reduce the energy intensity of ACP management and mitigate its impact on energy recovery. In particular, precipitation-based nutrient recovery could enhance HTL's appeal as means to valorize waste into renewable energy and valuable scarce materials.
       
  • Use of grape pomace as a biosorbent for the removal of the Brown KROM KGT
           dye
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Ana Paula de Oliveira, Aparecido Nivaldo Módenes, Maria Eduarda Bragião, Camila L. Hinterholz, Daniela E.G. Trigueros, Isabella G. de O. BezerraAbstractIn this paper, the removal capacity of grape pomace was evaluated removing the KROM Brown KGT dye. Initially, batch adsorption tests were conducted to evaluate the operating parameters, which indicated 2.0 as initial pH, particle size between 0.14–1.4 mm and temperature of 25 °C, for initial dye concentration of 100 mg L−1. Based on these operating conditions, kinetic and adsorption equilibrium data were obtained. The resulting equilibrium time was 12 h. The kinetic model of pseudo first order was the one that best represented the experimental data. The adsorption equilibrium data suggest a process of monolayers, according to the Langmuir model, with a maximum biosorption capacity of 180.2 ± 3.2 mg g−1. The thermodynamic data suggest a thermodynamically favorable and exothermic process. Based on the results, it was found that the grape pomace has potential to be used as biosorbent in wastewater treatment systems containing dyes.
       
  • Misuse of pre-exponential factor in the kinetic and thermodynamic studies
           using thermogravimetric analysis and its implications
    • Abstract: Publication date: June 2018Source: Bioresource Technology Reports, Volume 2Author(s): Imtiaz AliAbstractThis paper describes the misuse of Arrhenius pre-exponential factor in the kinetic and thermodynamic studies using thermogravimetry. Standard test method (ASTM E698) has been used recently by many researchers to calculate the pre-exponential factor. ASTM E698 is reserved for differential scanning calorimetry (DSC) and impose many restrictions which have being overlooked by many recently. The obtained pre-exponential factors have been used to describe the thermodynamic behavior during the course of thermal conversions. The objective of this paper is to inform the readers that the pre-exponential factor obtained from the restricted equation can mislead and generate some false thermodynamic data.
       
  • Direct saponification of wet microalgae by methanolic potassium hydroxide
           using acetone as co-solvent
    • Abstract: Publication date: Available online 31 May 2018Source: Bioresource Technology ReportsAuthor(s): Senthil Nagappan, R. Rajendra Kumar, J. Rupesh Balaji, Shachi Singh, Sanjay Kumar VermaAbstractThe fatty acids of microalgae are promising source of biodiesel and omega-3 fatty acids. The objective of this study is extraction of fatty acids from wet Dunaliela salina by direct saponification using methanolic potassium hydroxide and a suitable co-solvent. The study identified acetone as an efficient co-solvent for saponification of wet microalgal biomass by methanolic potassium hydroxide. The presence of acetone in methanolic KOH saponification produced 24% more fatty acid than its absence. Further optimization of concentration of acetone (80% v/v), concentration of potassium hydroxide (0.1% v/v) and solvent-dry biomass ratio (75:1) resulted in a maximum yield of 98% fatty acid. The proposed acetone assisted saponification of wet microalgal biomass could serve as an energy efficient route for fatty acid production since the reaction happens under room temperature and normal atmospheric pressure without any cell lysis or drying the biomass.
       
  • Effect of ionic liquid/inorganic salt/water pretreatment on the
           composition, structure and enzymatic hydrolysis of rice straw
    • Abstract: Publication date: Available online 19 May 2018Source: Bioresource Technology ReportsAuthor(s): Jing Gao, Shaoli Xin, Liyuan Wang, Youfeng Lei, Hongwu Ji, Shucheng LiuAbstractAlbeit ionic liquid (IL) pretreatment has been demonstrated to effectively enhance the saccharification of lignocellulosic biomass, extremely high costs of ILs still restrict its scale-up. If the ILs at high water content can be used as pretreatment solvents for lignocellulosic biomass, the chemical costs will be significantly reduced. However, the dissolving capacity of the ILs was notably decreased when water contents exceeded within limits. In this work, inorganic salts (K3PO4 and K2CO3) were added as additives of imidazolium-based IL/water systems to improve tolerance of ILs in the presence of water. The pretreatment with 50% 1-ethyl-3-methylimidazolium chloride ([C2mim]Cl) + 49.5% water + 0.5% K2CO3 at 95 °C for 3 h improved lignin removal to 69.32%, and also increased the surface areas as compared to untreated rice straw. The reducing sugar yield of the regenerated materials was increased to 82.45% after 72 h enzymatic hydrolysis.
       
  • NiO and CoO nanoparticles mediated biological hydrogen production: Effect
           of Ni/Co oxide NPs-ratio
    • Abstract: Publication date: Available online 28 February 2018Source: Bioresource Technology ReportsAuthor(s): Puranjan Mishra, Lakhveer Singh, M. Amirul Islam, Mohd Nasrullah, A.M. Mimi Sakinah, Zularisam Ab WahidAbstractThe impact of nickel and cobalt oxide nanoparticles (NPs) additive to palm oil mill effluent (POME) on hydrogen production was investigated using different Ni/Co oxide NPs-ratio. The Ni/Co oxide NPs-ratio of 1:0, 3:1, 1:1, 1:3 and 0:1 was added in batch mode operation. Experimental results suggested the H2 production dependency on the Ni/Co oxide NPs-ratio. The Ni/Co oxide NPs-ratio of 3:1 had better performance with the cumulative H2 and H2 production rate of 2844 ml H2 and 45 ml H2/h, respectively. This increased by ~37% and ~14, respectively in compared with the controlled one. The maximum CODremoval efficiency of 74% was observed at 3:1, which accounted for ~45% increment. These results suggested the improved performance of Bio-H2 can be fulfilled by additive of proper Ni/Co oxide NPs-ratio to the POME.
       
 
 
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