High-solids anaerobic digestion of municipal sludge pretreated by thermal hydrolysis

Water Environment Research : a Research Publication of the Water Environment Federation
Domènec Jolis

Abstract

High-solids anaerobic digestion can consistently achieve 55 to 60% volatile solids destruction after thermal hydrolysis pretreatment, which reduces its viscosity and increases the fraction of soluble organic matter. For feed sludge with total solids concentrations between 6.8 and 8.2%, the process is stable at hydraulic retention times of 9 to 12 days, significantly increasing the treatment capacity of existing digesters or, in treatment plants without spare capacity, helping to postpone, reduce, or even avoid costly infrastructure investments. Process stability is related to the high concentration of soluble organic matter in the digesters. High-solids temperature-phased digestion appears to be superior to high-solids mesophilic digestion, with respect to process flexibility and stability, biosolids stabilization, and biogas generation, although ammonia inhibition may have occurred. Implementation of high-solids digestion could significantly reduce operation and maintenance costs of solids-handling operations.

References

Aug 2, 2003·Chemosphere·Shihwu Sung, Tao Liu
Jan 1, 1995·Biotechnology Advances·A P Middelberg

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Citations

Jan 22, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Chenchen LiYuyao Zhang
Jul 5, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Juan E Ruiz-EspinozaSergio A Martínez-Delgadillo
Sep 2, 2014·Environmental Technology·Xiaocong LiaoYuning Yang
Jan 29, 2016·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Noemí Nava-ValenteJuan M Mendez-Contreras
Jan 11, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Baoqiang LiHaydée De Clippeleir

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