[1]吴玉梁,侯明秀,陈俣良,等.微膨胀活性污泥法处理低碳氮比生活污水效能[J].中国给水排水,2025,41(9):73-80.
　WUYu-liang,HOUMing-xiu,CHENYu-liang,et al.Treatment Efficiency for Domestic Sewage with Low Carbon to Nitrogen Ratio Using Micro-expanded Activated Sludge Process[J].China Water & Wastewater,2025,41(9):73-80.
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微膨胀活性污泥法处理低碳氮比生活污水效能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第9期 页码: 73-80 栏目: 出版日期: 2025-05-01
Title:
Treatment Efficiency for Domestic Sewage with Low Carbon to Nitrogen Ratio Using Micro-expanded Activated Sludge Process
作者:
吴玉梁1， 侯明秀2， 陈俣良1， 巴立波1， 刘一江1， 赵方波3， 衣雪松1
（1.海南大学 环境科学与工程学院，海南 海口 570228；2.上海交通大学 环境科学与工程学院，上海 200240；3.哈尔滨工程大学 材料科学与化学工程学院，黑龙江 哈尔滨 150001）
Author(s):
WU　Yu-liang1， HOU　Ming-xiu2， CHEN　Yu-liang1， BA　Li-bo1， LIU　Yi-jiang1， ZHAO　Fang-bo3， YI　Xue-song1
（1. School of Environmental Science and Engineering， Hainan University， Hainan 570228， China； 2. School of Environmental Science and Engineering， Shanghai Jiao Tong University， Shanghai 200240， China； 3. College of Materials Science and Chemical Engineering， Harbin Engineering University， Harbin 150001， China）
关键词:
微膨胀活性污泥;  低碳氮比污水;  序批式反应器;  丝状菌
Keywords:
micro-expanded activated sludge;  sewage with low carbon to nitrogen ratio;  sequencing batch reactor;  filamentous bacteria
摘要:
以低碳氮比（C/N）污水为研究对象，采用序批式反应器（SBR）启动微膨胀活性污泥工艺，探究降低污水C/N对微膨胀活性污泥特征、污染物去除效果及微生物群落结构的影响。将污水的C/N依次设定为6、3、1，污泥的SV和SVI平均值在C/N=3时达到最大，分别为47%和255 mL/g；降低C/N对COD去除效果的影响较小，3种C/N条件下COD平均去除率分别为94.6%、89.1%、86.5%；降低C/N对NH4+-N的去除效果无影响，其去除率均在99%以上；降低C/N对系统脱氮除磷效果的影响较大，随着C/N的降低，TN去除率由65%降至45%，TP去除率由50%降至34%；不同C/N条件下微生物群落结构存在一定差异，丝状菌Thiothrix（发硫菌属）的相对丰度在C/N=3时达到最大值32%。单个运行周期内（8 h），污染物在前4 h内去除速率较快，4 h后去除曲线变得平缓。
Abstract:
A sequencing batch reactor (SBR) was employed to implement the micro?expanded activated sludge process for the treatment of domestic sewage with low carbon to nitrogen ratio (C/N). The impact of reduced C/N ratios on the characteristics of micro-expanded activated sludge, pollutants removal efficiency, and microbial community composition was investigated. The C/N ratios of the sewage were established at 6, 3 and 1. The average SV and SVI values of the sludge reached their peak when the C/N ratio was 3, with respective values of 47% and 255 mL/g. Reducing the C/N ratio had a minimal impact on COD removal efficiency. The average COD removal efficiencies at the three different C/N ratios were 94.6%, 89.1%, and 86.5%, respectively. The reduction in C/N ratio did not influence NH4+-N removal efficiency, which consistently achieved a removal efficiency exceeding 99%. As the C/N ratio decreased, the TN removal efficiency dropped from 65% to 45%, and the TP removal efficiency declined from 50% to 34%. Significant variations were observed in the composition of microbial communities under different C/N ratios. Notably, the relative abundance of Thiothrix (Thiobacillus) peaked at 32% when the C/N ratio was 3. In a single operational cycle （8 hours）, the removal efficiencies of pollutants such as COD, NH4+-N, TN, and TP could achieve an optimal level within approximately 4 hours. Prolonging the cyclic time beyond this point had minimal impact on further improving the removal efficiency.
更新日期/Last Update: 2025-05-01