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交替好氧/缺氧运行模式对生物脱氮效能及活性污泥胞外聚合物的影响
摘要点击 272  全文点击 77  投稿时间:2017-05-19  修订日期:2017-06-12
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中文关键词  SBR  运行模式  生物脱氮  胞外聚合物
英文关键词  sequence batch reactor (SBR)  operating modes  biological nitrogen removal  extracellular polymeric substances
作者单位E-mail
孙洪伟 兰州交通大学环境与市政工程学院, 兰州 730070 shw@emails.bjut.edu 
陈翠忠 兰州交通大学环境与市政工程学院, 兰州 730070  
吴长峰 兰州威立雅水务(集团)有限责任公司, 兰州 730060  
赵华南 兰州交通大学环境与市政工程学院, 兰州 730070  
于雪 兰州交通大学环境与市政工程学院, 兰州 730070  
方晓航 环境保护部华南环境科学研究所, 广州 510655 fangxiaohang@scies.org 
中文摘要
      以实际生活废水为处理对象,考察了SBR工艺好氧/缺氧(O/A)和缺氧/好氧(A/O)运行模式对生物脱氮性能、胞外聚合物(extracellular polymeric substance,EPS)及其组分(蛋白质PN、多糖PS和核酸DNA)的影响.结果表明,O/A和A/O运行模式下,SBR工艺均获得了高效稳定的NH4+-N去除,去除率分别为97.5%和98.0%,且硝化速率与NH4+-N负荷呈现较好正相关性.交替缺氧/好氧运行模式对于EPS影响,A/O模式下EPS产量略高于O/A模式下,且运行模式对TB-EPS及其组分(PN、PS和DNA)产量无显著影响,但A/O模式下LB-EPS及其组分(PN和PS)产量均高于O/A模式下,倍数介于1.38~1.56之间.2种模式条件下,PS是TB-EPS和EPS的主要组分,而PN是LB-EPS的主要成分.EPS含量与污泥沉降性能具有良好的线性正相关.
英文摘要
      Nitrogen removal, extracellular polymeric substances (EPS), and the chemical composition (protein (PN), polysaccharide (PS), and DNA) by the aerobic/anoxic (O/A) and the anoxic/aerobic (A/O) modes were studied in a sequencing batch reactor (SBR) fed with domestic wastewater. The results showed that the removal rates of NH4+-N were 97.5% and 98.0% in the two operating modes, respectively, and a removal efficiency of NH4+-N with high efficiency and stability was obtained. The nitrification rate was positively correlated with the nitrogen loading ratio. The influence of operating modes for the alternating anoxic/oxic mode on extracellular polymeric substances of activated sludge was evaluated. The EPS constituent in the A/O mode was slightly higher than the O/A mode. The operating mode had no effect on the contents of PN, PS, and DNA in tightly bound EPS (TB-EPS) and TB-EPS. However, PN and PS in loosely bound EPS (LB-EPS) and LB-EPS in the A/O mode were 1.38 to 1.56 times those of the O/A mode. In the two operating modes, PSs were the main constituents in the TB-EPS and EPS, while PNs were the main constituents in LB-EPS. The EPS content had a good linear correlation with the sludge settling performance.

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