期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 693, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.07.364
关键词
Soluble microbial products; In-situ utilization; SMP-dependent denitrification; Nitrogen removal; Aerobic-anoxic SBR
资金
- National Natural Science Foundation of China [51878212]
- Harbin Institute of Technology Environment and Ecology Innovation Special Funds [HSCJ201604]
Soluble microbial products (SMPs), as secondary pollutants, comprise a dominant percentage of residual COD in effluents from biological wastewater treatment processes. They can also be regarded as substitute electron sources if the in-situ utilization of SMPs could be achieved. In this study, the fate of SMPs in a sequencing batch reactor (SBR) treating artificial municipal sewage was investigated. Based on the regular SBR operation mode, a 3 h extension of anoxic phase was provided to promote SMP degradation. Meanwhile, the denitrification efficiencies achieved by adopting SMPs and influent organic substrates (10Ss) were compared to reveal the significant contribution of the in-situ utilization of SMP for nitrogen removal. Approximately 21.1 mg NIL of total nitrogen (TN) was removed over a single cyclic reaction, in which only 132 mg N/L was removed via IOS-dependent denitrification. The remaining 7.9 mg N/L of TN was realized via SMP-dependent denitrification, including 3.9 mg N/L by utilization-associated products and 4.0 mg Nffi.. by biomass-associated products, which significantly contributed 37.4% of TN removal. The aromatic proteins, ttyptophan-like proteins, polysaccharides and fulvic acids contained in SMP were the potential precursors of electron donors to support SMP-dependent denitrification process. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据