Abstract：
:Two temperature-phased anaerobic digestion (TPAD) systems, with the thermophilic digesters acidified by acidogenesis products (AT-TPAD) or operated at neutral pH and balanced hydrolysis/acidogenesis and methanogenesis (NT-TPAD), were evaluated to treat high-strength dairy cattle manure. Despite similar methane productions (about 0.22 L/g VS fed), the NT-TPAD system removed significantly more VS (36%) than the AT-TPAD system (31%) and needed no pH adjustments. The thermophilic digester of the NT-TPAD system dominated the system performance and performed significantly better than that of the AT-TPAD system. The opposite held true for the mesophilic digesters. Differences of the thermophilic digesters between two TPAD systems affected the microbial communities of both local and downstream digesters. Each digester harbored distinctive microbial populations, some of which were significantly correlated with system performance. Methanosarcina was the most important methanogenic genus in both TPAD systems, while Methanosaeta only in the NT-TPAD system. Their populations were inversely related to VFA concentrations.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Lv W,Zhang W,Yu Zdoi
10.1016/j.biortech.2013.06.013subject
Has Abstractpub_date
2013-09-01 00:00:00pages
431-8eissn
0960-8524issn
1873-2976pii
S0960-8524(13)00932-2journal_volume
143pub_type
杂志文章abstract：:In this work, a single microbial electrochemical system was developed for multiple goals simultaneously - CO2 reduction, biogas purification, upgrading and sulfur recovery. This system consists of a methanogen-inoculated biocathode for CO2 reduction and a ferrous ion (Fe2+)-mediated abiotic anode for hydrogen sulfide ...
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