title: Microbial characteristics and nitrogen removal of simultaneous partial nitrification, anammox and denitrification (SNAD) process treating low C/N ratio sewage.
abstract: Simultaneous partial nitrification, anammox and denitrification (SNAD) process was successfully realized for treating low C/N ratio sewage, nitrogen and COD removal achieved to 3.26 kg m(-3) d(-1), 81%, respectively. The nitrogen removal performance, microbial community and distribution of the functional microorganisms were investigated. Results suggested that the presence of COD performed activity inhibition on both aerobic ammonia-oxidizing bacteria (AerAOB) and anaerobic ammonia-oxidizing bacteria (AnAOB), and led to the number decreasing of both AerAOB and AnAOB. Even though COD presence resulted in the biodiversity increasing of AerAOB and decreasing of AnAOB, the dominant species were always Nitrosomonas and Candidatus brocadia during the whole experiment. Clone-sequencing of 16S rRNA results suggested the emergence of five different denitrifying species, which then led to a higher nitrogen removal. Results in this study demonstrated that the applied start-up strategy was feasible for SNAD process treating low C/N ratio sewage.
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
authors.forename: Yuhai
authors.initials: Y
authors.lastname: Liang
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China. Electronic address: lidong2006@bjut.edu.cn.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Zeng
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology; D002244:Carbon / Q000032:analysis*; D058440:Denitrification; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008969:Molecular Sequence Data; D058465:Nitrification; D009584:Nitrogen / Q000032:analysis / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry*
chemical_list: D012722:Sewage; D002244:Carbon; D000641:Ammonia; D009584:Nitrogen
keywords: AerAOB; AnAOB; CANON; Denitrifying; SNAD