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
Chemospherejournal_title
Chemosphereauthors
Gou C,Yang Z,Huang J,Wang H,Xu H,Wang Ldoi
10.1016/j.chemosphere.2014.01.018subject
Has Abstractpub_date
2014-06-01 00:00:00pages
146-51eissn
0045-6535issn
1879-1298pii
S0045-6535(14)00084-8journal_volume
105pub_type
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