Journal
WASTE MANAGEMENT
Volume 78, Issue -, Pages 541-552Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.06.015
Keywords
Thin stillage; Anaerobic digestion; Conventional anaerobic baffled reactor; Hybrid anaerobic baffled reactor
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Funding
- NSERC
- NSERC-Engage
- IGPC Ethanol Inc. (Aylmer, ON, Canada)
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In this study, the performance of a conventional anaerobic baffled reactor (ABR) and a novel configuration of hybrid ABR for the treatment of thin stillage was evaluated. The hybrid ABR achieved the chemical oxygen demand (COD) removal, sulfate removal and methane yield of 97-94%, 94-97% and 294-310 mL CH4 g(-1) CODremoved, respectively at organic loading rate (OLR) of 1-3.5 kg COD m(-3) d(-1). On the other hand, the value of COD and sulfate removal and methane yield for the conventional ABR were 75-94%, 67-76% and 140-240 mL CH4 g(-1) CODremoved, respectively at OLR range of 1.1-1.8 kg COD m(-3) d(-1). The enhanced performance and robustness of the novel ABR was demonstrated to be the result of incorporation of solid/liquid/gas separators into the configuration of the conventional ABR, leading to reduced biomass washout, higher solid retention time and significantly improved phase separation. (C) 2018 Published by Elsevier Ltd.
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