Effects of temperature and organic loading rate on the performance and microbial community of anaerobic co-digestion of waste activated sludge and food waste.

Abstract:

:Anaerobic co-digestion of waste activated sludge and food waste was investigated semi-continuously using continuously stirred tank reactors. Results showed that the performance of co-digestion system was distinctly influenced by temperature and organic loading rate (OLR) in terms of gas production rate (GPR), methane yield, volatile solids (VS) removal efficiency and the system stability. The highest GPR at 55 °C was 1.6 and 1.3 times higher than that at 35 and 45 °C with the OLR of 1 g VSL(-1)d(-1), and the corresponding average CH₄ yields were 0.40, 0.26 and 0.30 L CH₄ g(-1)VSadded, respectively. The thermophilic system exhibited the best load bearing capacity at extremely high OLR of 7 g VSL(-1)d(-1), while the mesophilic system showed the best process stability at low OLRs (< 5 g VSL(-1)d(-1)). Temperature had a more remarkable effect on the richness and diversity of microbial populations than the OLR.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Gou C,Yang Z,Huang J,Wang H,Xu H,Wang L

doi

10.1016/j.chemosphere.2014.01.018

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

146-51

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(14)00084-8

journal_volume

105

pub_type

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