| Literature DB >> 27218438 |
Jia Meng1, Jiuling Li1, Jianzheng Li2, Cheng Wang1, Kaiwen Deng1, Kai Sun1.
Abstract
Anaerobic activated sludge (AnaS) and aerobic activated sludge (AerS) were used to start up a novel upflow microaerobic sludge reactor (UMSR), respectively, and the nitrogen removal in the two reactors were evaluated when treating low C/N ratio manure-free piggery wastewater with a COD/TN ration of about 0.85. With the same hydraulic retention time 8h and TN loading rate (NLR) 0.42kg/(m(3)d), the UMSR (R2) inoculated with AerS could reach its steady state earlier and obtained a better TN removal than that in the UMSR (R1) inoculated with AnaS. However, the accumulated AnaS made R1 show a better capability in bearing shock load and demonstrated an excellent NH4(+)-N and TN removal with a NLR as high as 1.07kg/(m(3)d). Microbial community structure of the accumulated AerS and AnaS were observable different. The decreased proportion of nitrifiers restricted the ammonium oxidation in R2, and resulting in a decrease in TN removal.Entities:
Keywords: Microaerobic process; Microbial community structure; Nitrogen removal; Piggery wastewater; Seed sludge
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Year: 2016 PMID： 27218438 DOI： 10.1016/j.biortech.2016.05.034
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642