Subjects -> ENGINEERING (Total: 2791 journals)
    - CHEMICAL ENGINEERING (248 journals)
    - CIVIL ENGINEERING (242 journals)
    - ELECTRICAL ENGINEERING (176 journals)
    - ENGINEERING (1402 journals)
    - ENGINEERING MECHANICS AND MATERIALS (452 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (100 journals)
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CIVIL ENGINEERING (242 journals)                  1 2 | Last

Showing 1 - 200 of 235 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 19)
Acta Polytechnica : Journal of Advanced Engineering     Open Access  
Acta Structilia : Journal for the Physical and Development Sciences     Open Access  
Advanced Engineering Research     Open Access  
Advances in Bridge Engineering     Open Access  
Advances in Civil Engineering     Open Access   (Followers: 47)
Agregat     Open Access  
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 40)
Architectural Engineering     Open Access   (Followers: 5)
Architecture and Engineering     Open Access   (Followers: 3)
Architecture, Civil Engineering, Environment     Open Access   (Followers: 3)
Archives of Civil and Mechanical Engineering     Hybrid Journal   (Followers: 2)
Archives of Civil Engineering     Open Access   (Followers: 25)
Archives of Hydro-Engineering and Environmental Mechanics     Open Access   (Followers: 1)
Asian Journal of Civil Engineering     Hybrid Journal   (Followers: 2)
Asian Transport Studies     Open Access   (Followers: 1)
ATBU Journal of Environmental Technology     Open Access   (Followers: 1)
Australian Journal of Civil Engineering     Hybrid Journal   (Followers: 4)
Australian Journal of Structural Engineering     Hybrid Journal   (Followers: 6)
Berkeley Planning Journal     Open Access   (Followers: 7)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 13)
Building & Management     Open Access   (Followers: 1)
Building and Environment     Hybrid Journal   (Followers: 16)
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 12)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 5)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 13)
ce/papers     Hybrid Journal  
Cement     Open Access   (Followers: 12)
Cement and Concrete Composites     Hybrid Journal   (Followers: 17)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 4)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 3)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 6)
Change Over Time     Full-text available via subscription   (Followers: 3)
Civil and Environmental Engineering     Open Access   (Followers: 6)
Civil and Environmental Engineering Reports     Open Access   (Followers: 3)
Civil and Environmental Research     Open Access   (Followers: 15)
Civil Engineering and Architecture     Open Access   (Followers: 31)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 2)
Civil Engineering and Technology     Open Access   (Followers: 23)
Civil Engineering Design     Hybrid Journal  
Civil Engineering Dimension     Open Access   (Followers: 19)
Civil Engineering Infrastructures Journal     Open Access   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 246)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 9)
Computers & Structures     Hybrid Journal   (Followers: 40)
Concreto y cemento. Investigación y desarrollo     Open Access  
Construction Economics and Building     Open Access   (Followers: 4)
Construction Engineering     Open Access   (Followers: 9)
Construction Management and Economics     Hybrid Journal   (Followers: 24)
Construction Robotics     Hybrid Journal   (Followers: 3)
Constructive Approximation     Hybrid Journal  
Construindo     Open Access  
Developments in the Built Environment     Open Access  
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 18)
Energy and Built Environment     Open Access  
Enfoque UTE     Open Access  
Engineering Project Organization Journal     Hybrid Journal   (Followers: 6)
Engineering Structures     Hybrid Journal   (Followers: 15)
Engineering Structures and Technologies     Open Access   (Followers: 4)
Engineering, Construction and Architectural Management     Hybrid Journal   (Followers: 12)
Environmental and Water Sciences, public Health and Territorial Intelligence Journal     Open Access   (Followers: 1)
Environmental Geotechnics     Hybrid Journal   (Followers: 6)
Eurasian Journal of Civil Engineering and Architecture     Open Access   (Followers: 2)
European Journal of Environmental and Civil Engineering     Hybrid Journal   (Followers: 5)
Exposure and Health     Hybrid Journal  
Fatigue & Fracture of Engineering Materials and Structures     Hybrid Journal   (Followers: 18)
Frontiers in Built Environment     Open Access   (Followers: 1)
Frontiers in Soil Science     Open Access   (Followers: 5)
Frontiers of Structural and Civil Engineering     Hybrid Journal   (Followers: 7)
Geomaterials     Open Access   (Followers: 2)
Geosystem Engineering     Hybrid Journal  
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 7)
Glass Structures & Engineering     Hybrid Journal   (Followers: 1)
HBRC Journal     Open Access  
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
Indonesian Journal Of Civil Engineering Education     Open Access  
Indonesian Journal of Urban and Environmental Technology     Open Access  
Inersia, Jurnal Teknik Sipil     Open Access   (Followers: 1)
Infrastructure Asset Management     Hybrid Journal   (Followers: 2)
Ingenio Magno     Open Access  
Insight - Non-Destructive Testing and Condition Monitoring     Full-text available via subscription   (Followers: 112)
International Journal for Service Learning in Engineering     Open Access  
International Journal of 3-D Information Modeling     Full-text available via subscription   (Followers: 2)
International Journal of Advanced Structural Engineering     Open Access   (Followers: 25)
International Journal of Building Pathology and Adaptation     Hybrid Journal   (Followers: 1)
International Journal of Civil Engineering     Hybrid Journal   (Followers: 1)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 2)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 10)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 9)
International Journal of Engineering and Geosciences     Open Access  
International Journal of Geo-Engineering     Open Access   (Followers: 2)
International Journal of Geosynthetics and Ground Engineering     Full-text available via subscription   (Followers: 3)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Masonry Research and Innovation     Hybrid Journal  
International Journal of Steel Structures     Hybrid Journal   (Followers: 2)
International Journal of Structural Engineering     Hybrid Journal   (Followers: 8)
International Journal of Structural Integrity     Hybrid Journal   (Followers: 2)
International Journal of Structural Stability and Dynamics     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 7)
Iranian Journal of Science and Technology, Transactions of Civil Engineering     Hybrid Journal   (Followers: 1)
J-ENSITEC : Journal Of Engineering and Sustainable Technology     Open Access   (Followers: 1)
JACEE (Journal of Advanced Civil and Environmental Engineering)     Open Access  
Journal of Applied Research in Water and Wastewater     Open Access  
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 12)
Journal of Building Engineering     Hybrid Journal   (Followers: 4)
Journal of Building Materials and Structures     Open Access   (Followers: 2)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 5)
Journal of Civil Engineering     Open Access   (Followers: 4)
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 14)
Journal of Civil Engineering and Environmental Sciences     Open Access  
Journal of Civil Engineering and Management     Open Access   (Followers: 8)
Journal of Civil Engineering and Materials Application     Open Access   (Followers: 10)
Journal of Civil Engineering Research     Open Access   (Followers: 8)
Journal of Civil Engineering, Science and Technology     Open Access   (Followers: 1)
Journal of Civil Society     Hybrid Journal   (Followers: 6)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 5)
Journal of Composites     Open Access   (Followers: 80)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 21)
Journal of Construction Engineering     Open Access   (Followers: 10)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 20)
Journal of Construction Engineering, Technology & Management     Full-text available via subscription   (Followers: 6)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 4)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Journal of Fluids and Structures     Hybrid Journal   (Followers: 7)
Journal of Graduate School of Natural and Applied Sciences of Mehmet Akif Ersoy University     Open Access   (Followers: 1)
Journal of Green Building     Full-text available via subscription   (Followers: 10)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 9)
Journal of Hydrology X     Open Access   (Followers: 3)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 13)
Journal of Legal Affairs and Dispute Resolution in Engineering and Construction     Full-text available via subscription   (Followers: 4)
Journal of Materials and Engineering Structures     Open Access   (Followers: 4)
Journal of Materials in Civil Engineering     Full-text available via subscription   (Followers: 8)
Journal of Mechanical, Civil and Industrial Engineering     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Offshore Structure and Technology     Full-text available via subscription  
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 4)
Journal of Pipeline Science and Engineering     Open Access   (Followers: 4)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 6)
Journal of Rehabilitation in Civil Engineering     Open Access   (Followers: 3)
Journal of Road and Traffic Engineering     Open Access   (Followers: 1)
Journal of Soft Computing in Civil Engineering     Open Access   (Followers: 1)
Journal of Solid Waste Technology and Management     Full-text available via subscription   (Followers: 3)
Journal of Structural Engineering     Full-text available via subscription   (Followers: 34)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 3)
Journal of Structural Integrity and Maintenance     Hybrid Journal  
Journal of Structural Mechanics     Open Access   (Followers: 1)
Journal of Structures     Open Access   (Followers: 5)
Journal of Sustainable Architecture and Civil Engineering     Open Access   (Followers: 3)
Journal of Sustainable Cement-Based Materials     Hybrid Journal  
Journal of Sustainable Design and Applied Research in Innovative Engineering of the Built Environment     Open Access   (Followers: 2)
Journal of the Civil Engineering Forum     Open Access   (Followers: 1)
Journal of the South African Institution of Civil Engineering     Open Access   (Followers: 2)
Journal of Water and Environmental Nanotechnology     Open Access   (Followers: 1)
Journal of Water and Wastewater / Ab va Fazilab     Open Access   (Followers: 1)
Journal on Today's Ideas - Tomorrow's Technologies     Open Access   (Followers: 1)
Jurnal Gradasi Teknik Sipil     Open Access  
Jurnal Spektran     Open Access  
Jurnal Teknik Sipil     Open Access  
Konstruksia     Open Access  
KSCE Journal of Civil Engineering     Hybrid Journal   (Followers: 4)
LHB Hydroscience Journal     Open Access   (Followers: 5)
Lithosphere     Open Access  
Material Design & Processing Communications     Hybrid Journal  
Materiales de Construcción     Open Access   (Followers: 1)
Media Komunikasi Teknik Sipil     Open Access  
Media Teknik Sipil     Open Access  
Modelling in Civil and Environmental Engineering     Open Access   (Followers: 4)
Mokslas – Lietuvos ateitis / Science – Future of Lithuania     Open Access  
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 17)
Nordic Concrete Research     Open Access  
npj Materials Degradation     Open Access  
Obras y Proyectos     Open Access  
Open Civil Engineering Journal     Open Access  
Open Journal of Civil Engineering     Open Access   (Followers: 7)
Open Waste Management Journal     Open Access   (Followers: 1)
PADURAKSA : Jurnal Teknik Sipil Universitas Warmadewa     Open Access  
Periodica Polytechnica Civil Engineering     Open Access  
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 5)
Pipeline & Gas Journal     Partially Free  
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 3)
Procedia Structural Integrity     Open Access   (Followers: 4)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 10)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 6)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 4)
Promet : Traffic &Transportation     Open Access  
Random Structures and Algorithms     Hybrid Journal   (Followers: 4)
Recent Trends In Civil Engineering & Technology     Full-text available via subscription   (Followers: 5)
REDER : Revista de Estudios Latinoamericanos sobre Reducción del Riesgo de Desastres     Open Access  
Rekayasa Sipil     Open Access  
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 7)
Resilience     Open Access   (Followers: 2)
Revista ALCONPAT     Open Access  
Revista de Investigación     Open Access  

        1 2 | Last

Similar Journals
Journal Cover
Indonesian Journal of Urban and Environmental Technology
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2579-9150 - ISSN (Online) 2579-9207
Published by Universitas Trisakti Homepage  [5 journals]
  • Back Cover

    • Authors: astri rinanti
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10751
      Issue No: Vol. 5, No. 1 (2021)
       
  • DETERMINATION OF DEOXYGENATION RATE OF URBAN RIVER USING MODIFICATION
           METHODS FOR CITEPUS RIVER WATER, BANDUNG, INDONESIA

    • Authors: Yonik Meilawati Yustiani, Mia Nurkanti, Fadhlan Khusyairi Tarigan, Gatut Sudarjanto
      Pages: 1 - 13
      Abstract: River water quality modeling needs appropriate and suitable coefficients especially in application for specific river like urban river. Aim: This study aims to determine the value of the coefficient with a short term duration and a variable test time span.  Several ways and methods of determining the rate of deoxygenation are developed according to the characteristics of the river and the environment. Modification method was applied in this research in which the test time span was unequal. The river chosen in this study is the Citepus River, Bandung, Indonesia representing an urban river in a tropical country. Methodology and Results: Sampling was carried out in the dry season. The laboratory analysis method used in determining the rate of deoxygenation uses the Slope Method of data from the short term incubation, which is ten days. The results showed that the Thomas Slope method's deoxygenation rate (K1) was 0.095 per day in the upstream segment, 0.917 per day in the middle segment, and 0.180 per day in the downstream segment. While the Ultimate BOD (La) value is 46.95 mg/l in the upstream segment, 38.70 mg/l in the middle segment, and 37.60 mg/l in the downstream segment. Conclusion, significance, and impact of study: The results of this study show that the value of the deoxygenation rate is similar to the theoretical surface water conditions. However, in the upstream segment, there is still a low deoxygenation rate value due to non-optimal activity of microorganisms. This findings will be very useful both in water quality modeling and river management.
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10740
      Issue No: Vol. 5, No. 1 (2021)
       
  • HYBRID ANAEROBIC BAFFLED REACTOR FOR REMOVAL OF BOD AND PHOSPHATE
           CONCENTRATION IN DOMESTIC WASTEWATER

    • Authors: Sugito Sugito, Rhenny Ratnawati, Herlina Afiafani
      Pages: 14 - 27
      Abstract: Hybrid Anaerobic Baffled Reactor (HABR) is a development technology from the Anaerobic Baffled Reactor (ABR), which was already known as a technology that is successful in treating domestic waste. Aims: The objectives of these studies were to investigate the efficiency of reducing BOD and phosphate levels in HABR with zeolite (ZE) and activated carbon (AC) media. Methodology and Results: HABR reactor made of acrylic material with a size of 90 cm x 20 cm x 30 cm. The reactor designed has 7 compartments, with details the first 5 compartments are suspended growth microorganism reactors and the next 2 compartments are attached growth microorganism reactors. Conclusion, significance, and impact of study: The result of the research showed that the efficiency of reducing BOD concentration in the reactor with ZE and AC media were 59.30% and 65.12%, respectively. The final BOD concentration in the AC reactor is 30 mg/L, this value meets the domestic wastewater quality standard required by East Java Governor Regulation Number 72 of 2013 concerning Wastewater Quality Standards for Industry and/or Other Business Activities. The final BOD concentration in the ZE reactor exceeded the required quality standard with a value of 35 mg/L. The final phosphate levels of the two reactors meet the wastewater quality standards for business and/or laundry activities with a maximum phosphate concentration of 10 mg/L. The final phosphate levels in the ZE and AC reactors were 3.74 mg/L and 8.79 mg/L, respectively. The efficiency of phosphate removal in ZE and AC reactors were 70.58% and 30.87%, respectively.
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10571
      Issue No: Vol. 5, No. 1 (2021)
       
  • TEMPORAL VARIATION OF GROUNDWATER QUALITY IN SLEMAN, YOGYAKARTA, INDONESIA

    • Authors: Yureana Wijayanti, Markus Fittkow, Riana Ayu Kusumadewi, Oki Setyandito
      Pages: 28 - 38
      Abstract: Groundwater quality evaluation is important to gain an insight of contamination source. It can later be utilized to review the implementation of a water resource management policy in a specific region. Aim: This study evaluate the short-term temporal variation of groundwater quality and its possible contamination source in Sleman, Yogyakarta. Methodology and Results: the statistical approach was utilized using boxplot, principle component analysis (PCA) and correlation matrices, to the data for 50 sampling sites. The data of groundwater quality are available from the local environmental authority of Environmental Agency Sleman.The box plots revealed that groundwater quality might largely influenced by rainfall in the area. The factor loading of PCA presented that the ratio of concentration of both chloride and TDS are the most varied of all samples, and the less variable parameter is fluoride. The pair of groundwater quality parameter which had strong correlation were varied in each year, except for TDS and chloride that showed strong correlation in all three years. Nitrite had strong correlation with iron in 2017 and, nitrite also had strong correlation with both manganese and fluoride in 2019. The existence of fluoride in correlation with other parameter might give an insight of contamination from livestock wastes, where in the study area there are many poultry and cow farms, and small scale chicken slaughter industries. Conclusion, significant and impact study: This study gives preliminary understanding on temporal variation of groundwater quality, for further research on groundwater quality in Sleman, Yogyakarta.
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10746
      Issue No: Vol. 5, No. 1 (2021)
       
  • THE EFFECT OF ROTOR ROTATION SPEED ON DECREASED LABORATORY LIQUID WASTE
           POLLUTING PARAMETERS

    • Authors: Muhammad Al Kholif, Joko Sutrinno, Indah Nurhayati, Retno Setianingrum
      Pages: 39 - 49
      Abstract: aboratory wastewater is produced through laboratory activities. Laboratory wastewater can have a large impact on the environment if it is not processed before being discharged into the water body. Laboratory waste treatment can be carried out using suspended growth technology to reduce pollutant loads, especially Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD). Aims: This study aims to treat wastewater produced by the activity of laboratory using suspended growth technology. Methodology and Results: This research was conducted by finding the most efficient rotor rotation in degrading the load of BOD5 and COD pollutants. The reactor used is a Mixed Flow Reactor type reactor made of acrylic material with a thickness of 5.5 mm. The reactor is arranged into three series with the same sampling time and different rotor turns that expressed in rotors per minute (rpm). The reactor series consists of Reactor I with 50 rpm rotor rotation speed, 100 rpm Reactor II and 150 rpm Reactor III. Processing is carried out using 8 hours of detention time and variation of sampling time every 8 hours. Conclusion, significant and impact study: From the results of the study obtained the highest level of effectiveness of reducing pollutant load on processing using 150 rpm rotor rotation and 40 hours sampling time which is 94.6% for BOD5 parameters and 94.4% for COD parameters.
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10572
      Issue No: Vol. 5, No. 1 (2021)
       
  • HEAVY METAL POLLUTANT SORPTION IN AQUATIC ENVIRONMENT BY MICROALGAE
           CONSORTIUM

    • Authors: Astri Rinanti, Melati Ferianita Fachrul, Rositayanti Hadisoebroto, Sinthya Desty, Rahmadhania Rahmadhania, Della Annisa Widyaningrum, Noor Aida Saad
      Pages: 50 - 69
      Abstract: Industrial waste that contains heavy metal can cause environmental problem because of its toxicity, persistency and accumulation level in the environment. Biosorption process is highly influenced by temperature, pH, light, contact time, and ratio of surface area. Microalgae which possess two functional groups that are able to react on metal ion in a solution can be exploited to overcome environmental pollution due to heavy metal compound. Closed cultivation system in a photobioreactor is utilized to overcome contamination and evaporation problems on open pond system. Heavy metal analysis is conducted by utilizing Atomic Absorption Spectroscopy (AAS), Fourier Transform Infra-Red (FTIR), and Scanning Electron Microscope (SEM). This article provides information on biosorption as alternative technology to overcome heavy metal in water areas with no side effects on the environment with advantages of the absence of secondary pollutants, high level of efficiency, and relatively economic compared to physic-chemical method heavy metal removal methods
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10747
      Issue No: Vol. 5, No. 1 (2021)
       
  • RAW WATER QUALITY ANALYSIS TO DISCOVER THE CAUSE OF PIPELINE SCALLING
           PROBLEM IN PT. X (ICE PRODUCTION COMPANY)

    • Authors: Kadek Diana Harmayani, Gede Adi Wiguna Sudiartha, I Wayan Budiarsa Suyasa
      Pages: 70 - 83
      Abstract: PT. X is one of the ice companies in which its largest company is located in Bali, more precisely in the Pidada area, North Denpasar. Based on field observations the area is an area that has a calcareous soil structure. The water source of PT. X was extracted from the groundwater. From the field observation, it was found that the pipeline network, that connected the inlet water to water treatment system and ice production units, was severely covered by faint white scale. In order to discover the origin of this scale, water quality testing need to be carried out.  From the results, it was found that the total hardness in the inlet water, taken from the groundwater tap, was 162.85 mg/l with calcium concentration of 2.15 mg/l and iron 3.83 mg/l. Water quality testing was also carried out in the water treatment unit consisting of resin softener where the total hardness surprisingly increased into 279.81 mg/l, calcium concentration was 2.96 mg/l, iron concentration was 0.55 mg/l. Even after being treated in softener resin, the total hardness increased sharply to 483 mg/l, which categorized as extreme hardness. The increase in total hardness indicates that there was a failure in the operation of the water treatment system, even it also contributed to the higher hardness and calcium concentration. This over-year’s treatment failure has been causing accumulation of hardness and calcium concentration in the compartment of both water treatment system and ice production unit that inflicts a higher hardness level in the effluent.
      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10748
      Issue No: Vol. 5, No. 1 (2021)
       
  • DEGRADATION OF POLYETHYLENE PLASTIC WASTE BY INDIGENOUS MICROBIAL
           CONSORTIUM AND FUNGI

    • Authors: Melati Ferianita Fachrul, Astri Rinanti, Salmiati Salmiati, Thalia Sunaryo
      Pages: 84 - 103
      Abstract: Aim: This research aims to determine the ability of indigenous microbial consortium in degrading Low Density Polyethylene (LDPE) plastics. The research start by preparing plastic into 1 x 1 cm2 size which was cut mechanically because the smaller the size of the plastic, the larger the surface area. The plastic is placed in a petri dish containing Nutrient Broth (NB) media. The variations used were bacterial composition (%) 10, 50, and 75, variations in temperature (°C) 25, 30, 35, variations in acidity values (pH) 5, 7, 9, and variations in contact time (Td) 10 days. LDPE plastic degradation was analyzed by gravimetric method, Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). Both types of bacteria were resistant or insensitive to the presence of plastic compounds as xenobiotic substrates because there was no inhibition zone around the plastic samples and they were able to grow on Nutrient Agar (NA) media added with plastic samples. Based on the results of gravimetric and FTIR analysis, the highest removal value was at a temperature variation of 30°C and pH 7 with a bacterial composition of 75% (v/v) which was incubated for 10 days. Methodology and Results:The results of the gravimetric analysis showed that the weight loss in LDPE plastic was 0.1548 gr to 0.1464 gr or 5.47%, while the FTIR analysis showed the intensity removal result was 70.67%. Conclusion, significance, and impact of study: These results were confirmed again using Scanning Electron Microscope (SEM) analysis which showed morphological changes on the surface of LDPE plastic samples. Changes that occur in LDPE plastic samples incubated with indigenous microbial consortium are influenced by several factors, including temperature, pH, contact time, and the presence of bacteria as biodegradators.

      PubDate: 2021-10-19
      DOI: 10.25105/urbanenvirotech.v5i1.10749
      Issue No: Vol. 5, No. 1 (2021)
       
 
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