Evaluation of COD effect on anammox process and microbial communities in the anaerobic baffled reactor (ABR).
Nitrogen removal with different organic carbon effect was investigated using anaerobic baffled reactor (ABR) anammox reactor. Results indicated that organic carbon exert an important effect on nitrogen removal through anammox process. When the feeding COD concentration was lower than 99.7mgL(-1), nitrogen removal could be enhanced via the coexistence of denitrification and anammox. Elevated COD could further deteriorate the anammox activity with almost complete inhibition at the COD concentration of 284.1mgL(-1). The nitrogen removal contribution rate of anammox was varied from 92.7% to 6.9%. However, the anammox activity was recovered when the COD/TN was decreased from 2.33 to 1.25 with influent nitrite addition. And, the anammox process was again intensified from 27.0 to 51.2%. High-throughput Miseq sequencing analyses revealed that the predominant phylum changed from Chloroflexi to Proteobacteria with the elevated COD addition, which indicated COD concentration was the most important factor regulating the bacterial community structure.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China; Key Laboratory for Water Pollution Control and Environmental Safety, Zhejiang Province, Hangzhou 310058, PR China.
Chongjun
C
Chen
Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore.
Faqian
F
Sun
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
Haiqing
H
Zhang
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
Jianfang
J
Wang
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
Yaoliang
Y
Shen
Key Laboratory for Water Pollution Control and Environmental Safety, Zhejiang Province, Hangzhou 310058, PR China. Electronic address: liang410@zju.edu.cn.
Xinqiang
X
Liang
D064751:Ammonium Compounds / Q000737:chemistry*; D000693:Anaerobiosis; D019149:Bioreactors / Q000382:microbiology; D058440:Denitrification; D059013:Microbial Consortia; D009573:Nitrites / Q000302:isolation & purification; D009930:Organic Chemicals / Q000737:chemistry; D010084:Oxidation-Reduction; D018508:Water Purification
D064751:Ammonium Compounds; D009573:Nitrites; D009930:Organic Chemicals
Anaerobic baffled reactor (ABR); Anammox; High-throughput Miseq sequencing; Microbial communities; Organic carbon