Effect of post-digestion temperature on serial CSTR biogas reactor performance - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Water Research Year : 2009

Effect of post-digestion temperature on serial CSTR biogas reactor performance

Abstract

The effect of post-digestion temperature on a lab-scale serial continuous-flow stirred tank reactor (CSTR) system performance was investigated. The system consisted of a main reactor operated at 55 degrees C with hydraulic retention time (HRT) of 15 days followed by post-digestion reactors with HRT of 5.3 days. Three post-digestion temperatures (55 degrees C, 37 degrees C and 15 degrees C) were compared in terms of biogas production, process stability, microbial community and methanogenic activity, The results showed that the post-digesters operated at 55 degrees C, 37 degrees C and 15 degrees C gave extra biogas production of 11.7%, 8.4% and 1.2%, respectively. The post-digester operated at 55 degrees C had the highest biogas production and was the most stable in terms of low VFA concentrations. The specific methanogenic activity tests revealed that the main reactor and the post-digester operated at 55 degrees C and 37 degrees C had very active acidogens and methanogens, In contrast, very low methanogenic activity was observed at 15 degrees C.

Domains

Hydrology
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Dates and versions

hal-02667651 , version 1 (09-08-2023)

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Kanokwan Boe, Dimitar Karakashev, Eric Trably, Irini Angelidaki. Effect of post-digestion temperature on serial CSTR biogas reactor performance. Water Research, 2009, 43 (3), pp.669-676. ⟨10.1016/j.watres.2008.11.037⟩. ⟨hal-02667651⟩
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