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Digestion Performance of Various Combinations of Thermophilic and Mesophilic Sludge Digestion Systems
Author(s) -
Kim Jongmin,
Novak John T.
Publication year - 2011
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143010x12681059117337
Subject(s) - anaerobic digestion , mesophile , biosolids , digestion (alchemy) , chemistry , thermophile , sulfur , sewage sludge , pulp and paper industry , waste management , sewage treatment , methane , biology , chromatography , biochemistry , bacteria , engineering , organic chemistry , genetics , enzyme
Various combinations of single‐ and multi‐stage anaerobic and aerobic‐anaerobic digestion systems were studied to evaluate their solids reduction potential with capabilities to control sulfur‐based biosolids odor compounds. All the multi‐stage digestion systems removed more volatile solids than the single‐stage anaerobic digestion systems, even at the same overall retention time. However, digestion systems with mesophilic digestion as the final stage showed a much lower headspace organic sulfur content in the dewatered biosolids than the systems with thermophilic digestion as the final stage. This observation leads to the conclusion that placing a mesophilic anaerobic digestion system at the end of multi‐stage digestion systems will enable greater sulfur‐based odor reduction from dewatered biosolids with greater solid reduction than single‐stage mesophilic or thermophilic digestion systems.