TY - JOUR
T1 - Towards centralized biogas plants
T2 - Co-digestion of sewage sludge and pig manure maintains process performance and active microbiome diversity
AU - Lavergne, Céline
AU - Bovio-Winkler, Patricia
AU - Etchebehere, Claudia
AU - García-Gen, Santiago
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/2
Y1 - 2020/2
N2 - The aim of this study is to assess the performance of anaerobic digestion against co-digestion systems during the start-up stages based on key process parameters and biological indicators. Two parallel experiments treating sewage sludge alone or co-digested with low concentration of pig manure (8% vol., 2–3% in COD basis) were carried out in two lab-scale CSTR at mesophilic conditions. Same inoculant and organic loading rate sequences were applied for two consecutive runs of 79 and 90 days. According to the removal efficiencies achieved, no significant differences were encountered amongst mono-digestion and co-digestion. This observation was reinforced with the analysis of the total/active microbiome, sequencing 16S rRNA genes and transcripts. The addition of a co-substrate at low concentration had a negligible effect on the total/active microbial communities; they evolved following the same pattern. This might be an advantage in order to upgrade existing wastewater treatment plants to become centralized biogas facilities.
AB - The aim of this study is to assess the performance of anaerobic digestion against co-digestion systems during the start-up stages based on key process parameters and biological indicators. Two parallel experiments treating sewage sludge alone or co-digested with low concentration of pig manure (8% vol., 2–3% in COD basis) were carried out in two lab-scale CSTR at mesophilic conditions. Same inoculant and organic loading rate sequences were applied for two consecutive runs of 79 and 90 days. According to the removal efficiencies achieved, no significant differences were encountered amongst mono-digestion and co-digestion. This observation was reinforced with the analysis of the total/active microbiome, sequencing 16S rRNA genes and transcripts. The addition of a co-substrate at low concentration had a negligible effect on the total/active microbial communities; they evolved following the same pattern. This might be an advantage in order to upgrade existing wastewater treatment plants to become centralized biogas facilities.
KW - Active microbiome
KW - Anaerobic digestion
KW - Co-digestion
KW - Next-generation sequencing
KW - Start-up
UR - http://www.scopus.com/inward/record.url?scp=85076119720&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2019.122442
DO - 10.1016/j.biortech.2019.122442
M3 - Article
C2 - 31780241
AN - SCOPUS:85076119720
SN - 0960-8524
VL - 297
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 122442
ER -
