Study on Municipal Waste Leachate Treatment in Two-stage Anaerobic Bioreactor as Continuous Flow
Background and Objective: In recent years, the management and disposal of municipal waste has become a global problem and the most important environmental concern. Landfill generates a large amount of leachate. Biologically process is considered a potential and cost-effective solution for the treatm...
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| Format: | Article |
| Language: | fas |
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Alborz University of Medical Sciences
2018-05-01
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| Series: | Muhandisī-i Bihdāsht-i Muḥīṭ |
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| Online Access: | http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-76&slc_lang=en&sid=1 |
| _version_ | 1811224000301367296 |
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| author | Saeed Ghanbari Azad Pashaki1 Mehdi Khojastehpour Mohammadali Ebrahimi-Nik Abbas Rohani |
| author_facet | Saeed Ghanbari Azad Pashaki1 Mehdi Khojastehpour Mohammadali Ebrahimi-Nik Abbas Rohani |
| author_sort | Saeed Ghanbari Azad Pashaki1 |
| collection | DOAJ |
| description | Background and Objective: In recent years, the management and disposal of municipal waste has become a global problem and the most important environmental concern. Landfill generates a large amount of leachate. Biologically process is considered a potential and cost-effective solution for the treatment of municipal landfill leachate. The aim of research was the biological treatment of landfill leachate using a two-stage anaerobic bioreactor in pilot scale.
Materials and Methods: Experiments were performed in two anaerobic completely stirred tank reactors (CSTR) with effective volumes of 10 and 30 L at a constant flow rate of 2 L/day and hydraulic retention times of 5 and 15 days under mesophilic conditions. After the start-up period, loading rate was increased from 0.07 to 2.65 kgCOD/m3.day. The effluent of the first anaerobic reactor was used as the influent of the second reactor. Physical and chemical analysis were performed based on standard methods for the examination of water and wastewater, USA.
Results: The results of experiments showed that the most suitable loading is 2.05 kgCOD/m3.day, which COD removal efficiency of reactors one, two and the system (total two steps CSTR) were 80, 65.1 and 93 %. In the whole system, BOD removal efficiency was obtained 92%. However, the NH4-N and alkalinity in the two anaerobic reactors were increased to 39 and 14.9%. The maximum methane percentage of the first and second reactors were 76 and 80%.
Conclusion: Two-stage anaerobic process can be used as the effective process to improve degradability and remove the organic pollutants.
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| first_indexed | 2024-04-12T08:41:54Z |
| format | Article |
| id | doaj.art-985d7f836f7a4adb97f2bcbad3cc8cce |
| institution | Directory Open Access Journal |
| issn | 2383-3211 |
| language | fas |
| last_indexed | 2024-04-12T08:41:54Z |
| publishDate | 2018-05-01 |
| publisher | Alborz University of Medical Sciences |
| record_format | Article |
| series | Muhandisī-i Bihdāsht-i Muḥīṭ |
| spelling | doaj.art-985d7f836f7a4adb97f2bcbad3cc8cce2022-12-22T03:39:50ZfasAlborz University of Medical SciencesMuhandisī-i Bihdāsht-i Muḥīṭ2383-32112018-05-0153286298Study on Municipal Waste Leachate Treatment in Two-stage Anaerobic Bioreactor as Continuous FlowSaeed Ghanbari Azad Pashaki10Mehdi Khojastehpour1Mohammadali Ebrahimi-Nik2Abbas Rohani3 . Former MSc Student, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran Associate Professor, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran . Assistant Professor, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran . Assistant Professor, Department of Biosystems Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran Background and Objective: In recent years, the management and disposal of municipal waste has become a global problem and the most important environmental concern. Landfill generates a large amount of leachate. Biologically process is considered a potential and cost-effective solution for the treatment of municipal landfill leachate. The aim of research was the biological treatment of landfill leachate using a two-stage anaerobic bioreactor in pilot scale. Materials and Methods: Experiments were performed in two anaerobic completely stirred tank reactors (CSTR) with effective volumes of 10 and 30 L at a constant flow rate of 2 L/day and hydraulic retention times of 5 and 15 days under mesophilic conditions. After the start-up period, loading rate was increased from 0.07 to 2.65 kgCOD/m3.day. The effluent of the first anaerobic reactor was used as the influent of the second reactor. Physical and chemical analysis were performed based on standard methods for the examination of water and wastewater, USA. Results: The results of experiments showed that the most suitable loading is 2.05 kgCOD/m3.day, which COD removal efficiency of reactors one, two and the system (total two steps CSTR) were 80, 65.1 and 93 %. In the whole system, BOD removal efficiency was obtained 92%. However, the NH4-N and alkalinity in the two anaerobic reactors were increased to 39 and 14.9%. The maximum methane percentage of the first and second reactors were 76 and 80%. Conclusion: Two-stage anaerobic process can be used as the effective process to improve degradability and remove the organic pollutants. http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-76&slc_lang=en&sid=1Biogas Biological method Leachate treatment Two-stage digestion |
| spellingShingle | Saeed Ghanbari Azad Pashaki1 Mehdi Khojastehpour Mohammadali Ebrahimi-Nik Abbas Rohani Study on Municipal Waste Leachate Treatment in Two-stage Anaerobic Bioreactor as Continuous Flow Muhandisī-i Bihdāsht-i Muḥīṭ Biogas Biological method Leachate treatment Two-stage digestion |
| title | Study on Municipal Waste Leachate Treatment in
Two-stage Anaerobic Bioreactor as Continuous Flow |
| title_full | Study on Municipal Waste Leachate Treatment in
Two-stage Anaerobic Bioreactor as Continuous Flow |
| title_fullStr | Study on Municipal Waste Leachate Treatment in
Two-stage Anaerobic Bioreactor as Continuous Flow |
| title_full_unstemmed | Study on Municipal Waste Leachate Treatment in
Two-stage Anaerobic Bioreactor as Continuous Flow |
| title_short | Study on Municipal Waste Leachate Treatment in
Two-stage Anaerobic Bioreactor as Continuous Flow |
| title_sort | study on municipal waste leachate treatment in two stage anaerobic bioreactor as continuous flow |
| topic | Biogas Biological method Leachate treatment Two-stage digestion |
| url | http://jehe.abzums.ac.ir/browse.php?a_code=A-10-25-76&slc_lang=en&sid=1 |
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