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

Kanokwan Boe; Dimitar Borisov Karakashev; Eric Trably; Irini Angelidaki

doi:10.1016/j.watres.2008.11.037

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

Kanokwan Boe, Dimitar Borisov Karakashev, Eric Trably, Irini Angelidaki

Research output: Contribution to journal › Journal article › Research › peer-review

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.

Original language	English
Journal	Water Research
Volume	43
Issue number	3
Pages (from-to)	669-676
ISSN	0043-1354
DOIs	https://doi.org/10.1016/j.watres.2008.11.037
Publication status	Published - 2009

Keywords

Post-digestion
Temperature
Biogas

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title = "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.",

keywords = "Post-digestion, Temperature, Biogas",

author = "Kanokwan Boe and Karakashev, {Dimitar Borisov} and Eric Trably and Irini Angelidaki",

year = "2009",

doi = "10.1016/j.watres.2008.11.037",

language = "English",

volume = "43",

pages = "669--676",

journal = "Water Research",

issn = "0043-1354",

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TY - JOUR

T1 - Effect of post-digestion temperature on serial CSTR biogas reactor performance

AU - Boe, Kanokwan

AU - Karakashev, Dimitar Borisov

AU - Trably, Eric

AU - Angelidaki, Irini

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Post-digestion

KW - Temperature

KW - Biogas

U2 - 10.1016/j.watres.2008.11.037

DO - 10.1016/j.watres.2008.11.037

M3 - Journal article

SN - 0043-1354

VL - 43

SP - 669

EP - 676

JO - Water Research

JF - Water Research

IS - 3

ER -

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

Abstract

Keywords

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