Anaerobic digestion of heat treated sludge liquor by pilot scale mesophilic EGSB reactor

Authors

  • Zhao Jing 1. Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; 2. State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFeuls), Beijing 100083, China
  • Qiao Wei 1. Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; 2. State R&D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee (BGFeuls), Beijing 100083, China
  • Wang Wei School of Environment, Tsinghua University, Beijing 100084, China
  • Gao Fang Center for Environmental Education and Communications of Ministry of Environmental Protection, Beijing 100029, China
  • Xiao Zheng 1. Biomass Engineering Center, College of Engineering, China Agricultural University, Beijing 100083, China; 2. Beijing Zhongyuan Chuangneng Engineering & Technology CO., LTD, Beijing 100080, China

DOI:

https://doi.org/10.25165/ijabe.v9i3.2371

Keywords:

anaerobic digestion, sludge, biogas, heat treatment, EGSB reactor, pilot scale

Abstract

Biogas recovery from heat treated sludge liquor was tested by a 4 m3 mesophilic expanded granular sludge bed (EGSB) reactor within 206 days. Before pilot experiment, the heat pretreatment effects on hydrolysis and biogas production potential on three sludges from different wastewater plants were evaluated using bench test. One of these sludges was used in the subsequent pilot heat treatment and EGSB reactor. The biogas conversion potential of this sludge filtrate was 79%. Seeded with granular sludge, the EGSB reactor could be quickly activated and adapted to the new filtrate substrate. The EGSB influent COD was 20.0-35.0 g/L, and the effluent COD was lower than 10.0 g/L. The COD removal rate was 60%-70% at an organic loading rate (OLR) of 10.0 kg COD/(m3•d). The fresh supernatant with low pH resulted in the high biogas production in EGSB. The effluent with high nitrogen and phosphor should be considered for further treatment. Keywords: anaerobic digestion, sludge, biogas, heat treatment, EGSB reactor, pilot scale DOI: 10.3965/j.ijabe.20160903.2371 Citation: Zhao J, Qiao W, Wang W, Gao F, Xiao Z. Anaerobic digestion of heat treated sludge liquor by pilot scale mesophilic EGSB reactor. Int J Agric & Biol Eng, 2016; 9(3): 146－153.

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Published

2016-05-31

How to Cite

Jing, Z., Wei, Q., Wei, W., Fang, G., & Zheng, X. (2016). Anaerobic digestion of heat treated sludge liquor by pilot scale mesophilic EGSB reactor. International Journal of Agricultural and Biological Engineering, 9(3), 146–153. https://doi.org/10.25165/ijabe.v9i3.2371

Issue

Vol. 9 No. 3 (2016): IJABE

Section

Renewable Energy and Material Systems

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