Abstract：
:High-solids anaerobic digestion (HSAD), a promising method with smaller reactor and less heating energy consumption, showed relatively lower digestion efficiency sometimes and higher tolerance to some inhibitors. To investigate the phenomena, the archaeal and bacterial communities in four anaerobic digesters treating sewage sludge with total solids (TS) of 10-19% were investigated. Although acetoclastic methanogenesis conducted mainly by genus Methanosarcina was still the main pathway producing methane, the total ratio of acetoclastic methanogens decreased along with the increased TS. In contrary, the relative abundance of hydrogenotrophic methanogens increased from 6.8% at TS 10% to 22.3% at TS 19%, and methylotrophic methanogens from 10.4% to 20.9%. The bacterial community was dominated by five phyla. Acidogenic and acetogenic bacteria affiliated to Firmicutes decreased following the increase of TS; while the proteolysis phylum Bacteroidetes increased, with a tolerant family ST-12K33 notably existing in the digesters at TS 17% and 19%.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Liu C,Li H,Zhang Y,Si D,Chen Qdoi
10.1016/j.biortech.2016.05.048subject
Has Abstractpub_date
2016-09-01 00:00:00pages
87-94eissn
0960-8524issn
1873-2976pii
S0960-8524(16)30688-5journal_volume
216pub_type
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