Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 342, Issue -, Pages 210-219Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.05.010
Keywords
Sequencing-batch membrane bioreactor; Swine wastewater; Short-cut nitrification and denitrification; Putative pathogen; Microbial community
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Funding
- Special Fund for Agro-scientific Research in the Public Interest [201303091]
- National Key Research and Development Program [2016YFD0501405]
- National Major Science & Technology Projects for Water Pollution Control and Management [2015ZX07203-007]
- National Natural Science Foundation of China [41501513, 21577161]
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Due to high-strength of organic matters, nutrients and pathogen, swine wastewater is a major source of pollution to rural environment and surface water. A sequencing-batch membrane bioreactor (SMBR) system with an automatic control strategy was developed for high-strength swine wastewater treatment. Short-cut nitrification and denitrification (SND) was achieved at nitrite accumulation rate of 83.6%, with removal rates of COD, NH4+-N and TN at 95%, 99% and 93%, respectively, at reduced HRT of 6.0 d and TN loading rate of 0.02 kgN/(kgVSS d). With effective membrane separation, the reduction of total bacteria (TB) and putative pathogen were 2.77 logs and 1%, respectively. The shift of microbial community was well responded to controlling parameters. During the SND process, ammonia oxidizing bacteria (AOB) (Nitrosomonas, Nitrosospira) and nitrite oxidizing bacteria (NOB) (Nitrospira) were enriched by 52 times and reduced by 2 times, respectively. The denitrifiers (Thauera) were well enriched and the diversity was enhanced. (C) 2017 Published by Elsevier B.V.
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