低溶解氧条件下分段进水对SBR工艺脱氮除磷效果的影响研究  

Effects of Step-feed on the Removal of Nitrogen and Phosphorus in SBR Process under the Condition of Low Dissolved Oxygen

作　　者：王珍宝 施春红 黄晓龙[1,2] 姜凯 WANG Zhenbao;SHI Chunhong;HUANG Xiaolong;JIANG Kai(College of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Industrial Typical Pollutant Waste Recycling,Beijing University of Science and Technology,Beijing 100083,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]北京科技大学工业典型污染物废物资源化处理北京市重点实验室,北京100083

出　　处：《安全与环境工程》2018年第2期95-100,共6页Safety and Environmental Engineering

基　　金：国家海洋公益专项项目(201405035;09100122;20150006)

摘　　要：针对传统生物法处理低C/N生活污水存在曝气量过饱和、有机碳源不足和脱碳效率低等问题,开展了低溶解氧(DO)条件下分段进水SBR运行模式的试验研究,对比分析4种低DO条件下传统SBR工艺与分段进水SBR运行模式的脱氮除磷效果。结果表明:传统SBR工艺中,CODCr去除率达到90%以上,而二段进水方式下其去降率下降了20%;采用4种不同DO条件下,一段进水方式下SBR反应器的脱氮效率较低,出水中TN分别为17.4mg/L、19.5mg/L、18.6mg/L、21.6mg/L,其中当DO为1.0mg/L时SBR反应器的脱氮效率最高,TN去除率达到45%,而TP去除率分别为19%、25%、22%、21%;对于二段进水,同样的DO条件下,其中当DO为1.0mg/L时SBR反应器的脱氮除磷效果最佳,脱氮除磷去除率分别提高了17%、20%。通过分段进水,提高了进水中反硝化细菌和聚磷菌对原有有机物的利用率,从而提高了SBR反应器的脱氮除磷效率。To address the problems of the traditional biological method in treatment of low C/N sewage,covering supersaturation of aeration,deficiency of organic carbon source and low efficiency of decarburization,this paper researches on the step-feed SBR operation mode under low dissolved oxygen(DO)condition.The paper compares the removal of nitrogen and phosphorus by four kinds of conventional SBR process and step-feed SBR operation mode under low DO condition.The results show that removal rate of COD is over 90%by conventional SBR process,while that of two-step-feed decreases by 20%.By using one-step feed,the denitrification efficiency are low under four different DO values,as the effluent TN is 17.4 mg/L,19.5 mg/L,18.6 mg/L,21.6 mg/L respectively,with the highest removal rate of TN being 45%when DO is 1.0 mg/L;and the removal rate of TP is 19%,25%,22%and 25%respectively.By using two-step feed,the removal rate of nitrogen and phosphorus is the best when DO is 1.0 mg/L,increased by 17%and 20%respectively compared with those by using one-step feed.By means of step-feed,the utilization ratio of the original organics by anti-nitrification bacteria and phosphorus-accumulating bacteria are enhanced,thus the efficiency of denitrification and phosphorus removal is improved.

关 键 词：分段进水 SBR工艺 低C/N生活污水 脱氮除磷 污泥微膨胀 低溶解氧 

分 类 号：X703[环境科学与工程—环境工程]