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Improvement in nitrogen removal and changes in community structure in a sequencing batch reactor bioaugmented with P. stutzeri strain XL-2
Yang, Ji Xiang2; Zhao, Bin1; Zhang, Peng1; Chen, Dan Yang1; Chen, You Peng1
2020-12-01
摘要The aim of this work was to study the bioaugmentation of P. stutzeri strain XL-2 in activated sludge to improve nitrogn removal from wastewater with the guide of growth kinetics. When 4250 mg/L COD and 80 mg/L NH4+- N were applied, the TN removal efficiency in a bioaugmented sequencing batch reactor (SBRC L ) achieved 95%, while that in the control reactor (SBRC) without strain XL-2 was only 84% (P < 0.05). The microbial community analysis demonstrated that strain XL-2 was successfully bioaugmented in SBRXL, and increasing influent COD concentration promoted its abundance. Influent COD concentration played a dominant role in affecting community structure, while the bioaugmentation of strain XL-2 had much less impact on the community structure. Combined with principal coordinates analysis, redundancy analysis and FAPROTAX, the improvement of TN removal was mainly achieved by the bioaugmentation of strain XL-2, which played a major role in promoting aerobic denitrification.
关键词Nitrogen removal Bioaugmentation Heterotrophic nitrification and aerobic denitrification Microbial community structure Sequencing batch reactor
DOI10.1016/j.biortech.2020.123976
发表期刊BIORESOURCE TECHNOLOGY
ISSN0960-8524
卷号317页码:9
通讯作者Zhao, Bin(binzhao11@cqu.edu.cn)
收录类别SCI
WOS记录号WOS:000577077100010
语种英语