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Optimization of biogas production from waste activated sludge through serial digestion

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  • Athanasoulia, E.
  • Melidis, P.
  • Aivasidis, A.

Abstract

The treatment and disposal of excess sludge represents a problem of growing importance of wastewater treatment plants all over the world. Anaerobic digestion is the most common method for sludge stabilization resulting in biogas production at the same time. In the present study, in pilot-scale experiments, process performance and biogas production of a cascade of two methanogenic continuously stirred tank reactors (CSTR) connected in series, was compared to a conventional one-step CSTR reactor treating sewage sludge. Retention times between 12.3 and 19.7 days were examined for both systems. Results showed that the serial configuration could improve biogas production by 9.5–40.1%. Biogas selectivity estimated 0.49 ± 0.06 m3biogas/kg TVSdegraded for the cascade and 0.44 ± 0.02 m3biogas/kg TVSdegraded for the one-step process. Both systems contained low VFA concentrations in the effluent. In terms of volatile suspended solids reduction, values ranged between 31.5% and 33.8% for the one-step process and between 36.2% and 40.7% for the cascade. The study thus suggests that the process performance and biogas production from sewage sludge can be optimized through serial digestion.

Suggested Citation

  • Athanasoulia, E. & Melidis, P. & Aivasidis, A., 2012. "Optimization of biogas production from waste activated sludge through serial digestion," Renewable Energy, Elsevier, vol. 47(C), pages 147-151.
    • Handle: RePEc:eee:renene:v:47:y:2012:i:c:p:147-151
    DOI: 10.1016/j.renene.2012.04.038
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    References listed on IDEAS

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    1. Zhu, Zhenwei & Hsueh, Michael K. & He, Qiang, 2011. "Enhancing biomethanation of municipal waste sludge with grease trap waste as a co-substrate," Renewable Energy, Elsevier, vol. 36(6), pages 1802-1807.
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    1. Athanasoulia, E. & Melidis, P. & Aivasidis, A., 2014. "Co-digestion of sewage sludge and crude glycerol from biodiesel production," Renewable Energy, Elsevier, vol. 62(C), pages 73-78.
    2. Khayum, Naseem & Anbarasu, S. & Murugan, S., 2018. "Biogas potential from spent tea waste: A laboratory scale investigation of co-digestion with cow manure," Energy, Elsevier, vol. 165(PB), pages 760-768.
    3. Maghanaki, M. Mohammadi & Ghobadian, B. & Najafi, G. & Galogah, R. Janzadeh, 2013. "Potential of biogas production in Iran," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 702-714.
    4. Li, YuQian & Liu, ChunMei & Wachemo, Akiber Chufo & Li, XiuJin, 2018. "Effects of liquid fraction of digestate recirculation on system performance and microbial community structure during serial anaerobic digestion of completely stirred tank reactors for corn stover," Energy, Elsevier, vol. 160(C), pages 309-317.
    5. Di Maria, Francesco & Micale, Caterina & Sordi, Alessio, 2014. "Electrical energy production from the integrated aerobic-anaerobic treatment of organic waste by ORC," Renewable Energy, Elsevier, vol. 66(C), pages 461-467.
    6. Afazeli, Hadi & Jafari, Ali & Rafiee, Shahin & Nosrati, Mohsen, 2014. "An investigation of biogas production potential from livestock and slaughterhouse wastes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 380-386.
    7. Andreas Walter & Maria Hanser & Christian Ebner & Heribert Insam & Rudolf Markt & Sebastian Hupfauf & Maraike Probst, 2022. "Stability of the Anaerobic Digestion Process during Switch from Parallel to Serial Operation—A Microbiome Study," Sustainability, MDPI, vol. 14(12), pages 1-14, June.
    8. Derick Lima & Gregory Appleby & Li Li, 2023. "A Scoping Review of Options for Increasing Biogas Production from Sewage Sludge: Challenges and Opportunities for Enhancing Energy Self-Sufficiency in Wastewater Treatment Plants," Energies, MDPI, vol. 16(5), pages 1-34, March.
    9. Bidart, Christian & Fröhling, Magnus & Schultmann, Frank, 2014. "Electricity and substitute natural gas generation from the conversion of wastewater treatment plant sludge," Applied Energy, Elsevier, vol. 113(C), pages 404-413.
    10. Zhang, Wanqin & Wei, Quanyuan & Wu, Shubiao & Qi, Dandan & Li, Wei & Zuo, Zhuang & Dong, Renjie, 2014. "Batch anaerobic co-digestion of pig manure with dewatered sewage sludge under mesophilic conditions," Applied Energy, Elsevier, vol. 128(C), pages 175-183.
    11. Di Maria, Francesco & Micale, Caterina, 2015. "The contribution to energy production of the aerobic bioconversion of organic waste by an organic Rankine cycle in an integrated anaerobic–aerobic facility," Renewable Energy, Elsevier, vol. 81(C), pages 770-778.

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