反硝化
膜生物反应器
缺氧水域
化学
生物反应器
废水
生物量(生态学)
环境化学
有机质
微粒
污水处理
环境科学
环境工程
氮气
生态学
有机化学
生物
作者
Min Zheng,Yanchen Liu,Chengwen Wang,Kangning Xu
出处
期刊:Chemosphere
[Elsevier]
日期:2013-11-01
卷期号:93 (11): 2669-2674
被引量:12
标识
DOI:10.1016/j.chemosphere.2013.08.045
摘要
Particulate organic matter (POM) in wastewater is a potential denitrification carbon source, while the optimal operational mode using denitrification mechanism with POM is still unclear in wastewater treatment plants. In this work, we investigated the denitrification rates (DNRs) in a full-scale membrane bioreactor (MBR) coupled with two-stage pre-anoxic (pre-AN), and then evaluated the POM denitrification efficiency using mechanism modeling. The results indicate that POM related fraction accounted for the majority of the obtained specific DNR of 1.39±0.46mgNg(-1) MLVSS h(-1) in the second pre-AN without available soluble carbon source. The modeling approaches with calibration and validation procedures estimated a high residual POM concentration of 0.17g COD g(-1) MLVSS in the activated sludge, which provided specific DNR of 1.14mgNg(-1) MLVSS h(-1). High POM retention time in the reactor was the result of high solid retention time used in the MBR. In particular, post-AN of high biomass concentration could provide the highest POM denitrification efficiency in MBR. The MBR process combined with additional sludge reduction technology could further enhance denitrification by POM.
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