TY - JOUR
AU1 - Moestedt, Jan
AU2 - Nordell, Erik
AU3 - Hallin, Sara
AU4 - Schnürer, Anna
AB - BACKGROUND This study evaluated a two‐stage process as an alternative to single‐stage anaerobic degradation, with the aim of separating sulphidogenesis and methanogenesis while treating a mixture of organic fraction municipal solid waste (OFMSW) and thin stillage. For full‐scale applications, no pH regulation was applied. The hydrolytic/acidogenic stage was evaluated with a hydraulic retention time (HRT) between 3 and 15 days, with and without recirculation of methanogenic stage reactor material. RESULTS Homoacetogenesis dominated in the hydrolytic/acidogenic stage. However, sulphate reduction was unsuccessful. Using a two‐stage approach with OFMSW at a HRT of 10 days in the first stage and 28 days in the second stage resulted in a 12% increase in specific methane production and a 6% increase in methane content. The two‐stage process with thin stillage was less effective, probably because of decreasing pH (<4) in the first stage. CONCLUSION Two‐stage operation resulted in a pH too low (~4) for successful sulphate reduction in the first stage. However the resulting pH and applied organic loading rate caused homoacetogenesis to dominate, producing acetate as a favourable energy carrier between the stages. © 2015 Society of Chemical Industry
TI - Two‐stage anaerobic digestion for reduced hydrogen sulphide production
JF - Journal of Chemical Technology & Biotechnology
DO - 10.1002/jctb.4682
DA - 2016-04-01
UR - https://www.deepdyve.com/lp/wiley/two-stage-anaerobic-digestion-for-reduced-hydrogen-sulphide-production-XhqaajPEun
SP - 1055
EP - 1062
VL - 91
IS - 4
DP - DeepDyve
ER -