厌氧池-表流湿地处理污水厂尾水的实验研究  

Experimental study on anaerobic tank surface flow wetlandfor treatment of wastewater from wastewater treatment plant

作　　者：何艳芸 冯民权[1] 王毅博[2] HE Yan-yun;FENG Min-quan;WANG Yi-bo(State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;College of Environment and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,陕西西安710048 [2]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《应用化工》2023年第4期1033-1037,1042,共6页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51679191);陕西省自然科学基础研究计划重点项目(2019JZ-42);山西省水利科学技术研究与推广项目(2022GM037)。

摘　　要：为探究人工湿地处理效果受水力停留时间(HRT)的影响,利用厌氧池-表流人工湿地(AT-SFCW)系统处理污水厂尾水,探讨COD_(cr)、NH_(4)^(+)-N、NO_(3)^(-)-N和TP污染物在系统内的去除规律。结果表明,AT-SFCW系统COD_(cr)、NH_(4)^(+)N、NO_(3)^(-)-N和TP去除效果随HRT的延长都呈现先增后减的趋势,系统最佳HRT为5 d,对各污染物去除率最高分别为83.68%,86.22%,88.99%,69.87%。HRT=5 d时各污染物浓度变化显示,污染物沿各处理单元明显降低,在厌氧池中COD_(cr)、NO_(3)^(-)-N大部分得到去除,分别降至18.19 mg/L和0.29 mg/L;NH_(4)^(+)N、TP的去除过程主要发生在表流湿地中,分别降至1.50,0.55 mg/L。为人工湿地最佳HRT的选择、脱氮规律的明确及氮磷去除率的提高具有重要的指导意义。In order to explore the effect of hydraulic retention time(HRT)on the treatment effect of constructed wetland,the anaerobic tank surface flow constructed wetland(AT-SFCW)system was used to treat the tail water of sewage plant.The removal rules of COD_(cr),NH_(4)^(+)N,NO_(3)^(-)-N and TP pollutants in the system were discussed by investigating the effect of HRT change on the removal effect of pollutants.The results show that the removal efficiency of COD_(cr),NH_(4)^(+)N,NO_(3)^(-)-N and TP in AT-SFCW system increases first and then decreases with the extension of HRT.The optimal HRT of the system is 5 d,and the highest removal efficiency of each pollutant is 83.68%,86.22%,88.99%and 69.87%respectively.When HRT=5 d,the concentration change of each pollutant shows that the pollutants are significantly reduced along each treatment unit,and most of COD cr and NO_(3)^(-)-N are removed in the anaerobic tank,which are reduced to 18.19 mg/L and 0.29 mg/L respectively;The removal of NH_(4)^(+)N and TP mainly occurred in the surface flow wetland,decreasing to 1.50 mg/L and 0.55 mg/L respectively.This study provides a theoretical basis for the selection of the best HRT for the combined constructed wetland.The quantitative analysis of nitrogen and phosphorus removal pathways has important guiding significance for the in-depth understanding of the law of nitrogen removal in the constructed wetland and the improvement of the removal rate of nitrogen and phosphorus.

关 键 词：表流湿地 水力停留时间 污水厂尾水 

分 类 号：TQ110.9[化学工程—无机化工] X52[环境科学与工程—环境工程]