城镇面源污染控制典型案例研究:以东江沙河流域茶亭生态调蓄塘湿地为例
A CASE STUDY ON URBAN NON-POINT SOURCE POLLUTION CONTROL:THE HUIZHOU CHATING ECOLOGICAL REGULATION POND IN THE SHAHE RIVER BASIN OF THE DONGJIANG RIVER
李登辉 1黄邦杰 2张宗尧 2刘小尘 3杜宏伟 2孙洪伟 4房怀阳 2方晓航2
作者信息
- 1. 生态环境部华南环境科学研究所,广东省水与大气污染防治重点实验室,国家水环境模拟与污染控制重点实验室,广州 510535;兰州交通大学环境与市政工程学院,兰州 730070
- 2. 生态环境部华南环境科学研究所,广东省水与大气污染防治重点实验室,国家水环境模拟与污染控制重点实验室,广州 510535
- 3. 暨南大学环境学院,广州 510630
- 4. 烟台大学环境与材料工程学院,山东烟台 264000
- 折叠
摘要
为探究华南城镇面源污染的季节性效能,应对下游感潮河段低溶解氧问题,以东江支流沙河流域惠州茶亭生态调蓄塘(ERP)为对象进行监测,分析污染物沿程的迁移转化过程和处理效能.结果表明:ERP中有机物和磷主要通过沉降、过滤、截留等物理过程去除,而氮主要通过生物硝化反硝化作用去除.此外,塘内局部DO浓度较高,反硝化过程被抑制,产生了NO3--N积累.整体而言,在湿地/集水区面积比率为0.9％的条件下,ERP系统处理效能稳定,旱、雨两季 COD、NH4+-N、TP、TN 的平均削减率分别为 8.4％、59.3％、66.7％、31.8％和 23.2％、52.9％、51.5％、23.4％,除了TN和NO3--N的去除能力受到限制外,其余指标旱季和雨季出水均优于GB 3838-2002《地表水环境质量标准》中V类标准.研究结果可为周边城镇面源污染控制提供技术支撑.
Abstract
To explore the seasonal efficiency of non-point source pollution in towns in South China,and deal with the low dissolved oxygen problem in the downstream tidal reach,this study took Huizhou Chating Ecological Regulation Pond(ERP)in Shahe River Basin,a tributary of Dongjiang River,as the monitoring object,and analyzed the migration and transformation process and treatment efficiency of pollutants along the river.The results showed that organic matter and phosphorus in ERP are mainly removed by sedimentation,filtration and retention,while nitrogen is mainly removed by biological nitrification and denitrification.In addition,the concentration of local dissolved oxygen in the pond is high,and the denitrification process is inhibited,resulting in NO3--N accumulation.On the whole,under the condition of 0.9％wetland/catchment area ratio,the treatment efficiency of the ERP system was stable,and the average reduction rates of COD,NH4+-N,TP and TN were 8.4％,59.3％,66.7％and 31.8％and 23.2％,52.9％,51.5％and 23.4％,respectively,in drought and rain seasons.Except for the limited removal capacity of TN and NO3--N,the other water quality indexes in the effluent complies with the Category V standard in the Environmental Quality Standard for Surface Water(GB 3838-2002),and the study can provide technical support for the control of non-point source pollution in surrounding towns.
关键词
生态调蓄塘湿地/面源污染削减技术/城镇面源/处理效能Key words
ecological regulation pond wetland/non-point source pollution reduction technology/urban non-point source/treatment efficiency引用本文复制引用
基金项目
广东省重点领域研发计划项目(2020B1111350001)
国家重点研发计划项目(2022YFC3202202)
出版年
2024
NETL
NSTL
万方数据