[1]王帆,李军,艾胜书,等.HRT对多级A/O耦合流离生化工艺低温脱氮的影响[J].中国给水排水,2022,38(17):74-80.
　WANGFan,LIJun,AISheng-shu,et al.Effect of Hydraulic Retention Time on Multistage A/O Coupled with Flow-separated Biochemical Process for Nitrogen Removal from Wastewater at Low Temperature[J].China Water & Wastewater,2022,38(17):74-80.
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HRT对多级A/O耦合流离生化工艺低温脱氮的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期数: 2022年第17期 页码: 74-80 栏目: 出版日期: 2022-09-01
Title:
Effect of Hydraulic Retention Time on Multistage A/O Coupled with Flow-separated Biochemical Process for Nitrogen Removal from Wastewater at Low Temperature
作者:
王帆1， 李军2， 艾胜书1， 康华1， 聂泽兵1,3， 边德军1,3
（1.长春工程学院 吉林省城市污水处理重点实验室，吉林 长春 130012；2.北京工业大学 建筑工程学院，北京 100124；3.东北师范大学 吉林省城市污水处理与水质保障科技创新中心，吉林 长春 130117）
Author(s):
WANG　Fan1， LI　Jun2， AI　Sheng-shu1， KANG　Hua1， NIE　Ze-bing1，3， BIAN　De-jun1，3
（1. Jilin Key Laboratory of Urban Sewage Treatment， Changchun Institute of Technology， Changchun 130012， China； 2. College of Architecture and Civil Engineering， Beijing University of Technology， Beijing 100124， China； 3. Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection， Northeast Normal University， Changchun 130117， China）
关键词:
水力停留时间;  多级A/O工艺;  低温;  脱氮;  同步硝化反硝化;  生物膜
Keywords:
HRT;  multistage A/O process;  low temperature;  nitrogen removal;  simultaneous nitrification and denitrification;  biofilm
摘要:
为探究低温下水力停留时间（HRT）对三级A/O耦合流离生化工艺脱氮的影响，选用流离球作为生物膜载体，控制温度为（10±1） ℃、进水流量分配比为25∶15∶6、总曝气量为6 L/min、污泥龄为43 d、污泥回流比为50%，考察HRT分别为12、8、6 h时的运行效果。结果表明，HRT为8 h时脱氮效果最好，COD、NH4+-N和TN平均去除率分别为84.98%、92.03%和68.52%。分析生化系统各级脱氮效果可知，HRT为6 h时，硝化反应是制约耦合工艺低温高效脱氮的关键因素；HRT为12 h时不利于提高微生物活性，TN去除率较低且去除效果不稳定。研究结果丰富了多级A/O耦合工艺低温脱氮理论，同时可为工程设计应用提供参考。
Abstract:
The effect of hydraulic retention time (HRT) on three-stage A/O coupled with flow-separated biochemical process for nitrogen removal at low temperature was explored. The performances of the process operated with HRT of 12 h, 8 h and 6 h were investigated respectively, and other operational conditions were as follows: flow-separated ball as the biofilm carrier, temperature of (10±1) ℃, influent flow distribution ratio of 25∶15∶6, total aeration rate of 6 L/min, sludge retention time of 43 days and sludge reflux ratio of 50%. When HRT was 8 h, the denitrification performance was the best, and the average removal rates of COD, NH4+-N and TN were 84.98%, 92.03% and 68.52%, respectively. The denitrification performances of different stage biochemical systems indicated that nitrification was the key factor restricting high-efficiency denitrification of the coupling process at low-temperature when HRT was 6 h. HRT of 12 h was not conducive to the improvement of microbial activity, and the TN removal rate was low and unstable. The paper enriches the theory of nitrogen removal in multistage A/O coupling processes at low temperature, and can provide reference for engineering design and application.

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更新日期/Last Update: 2022-09-01