摘要
我国市政污水厂尾水排放量大、回用率低、氮磷浓度较高,是造成水体富营养化的主要原因。尾水中较高浓度的氮磷易导致水中藻类等浮游生物大量繁殖,破坏水体耗氧和复氧平衡,使水质恶化。尾水总氮中主要以硝氮为主,其去除需要有机物作为电子供体,而尾水C/N较低,常规工艺往往难以有效净化,需要进一步的深度处理。因此,该文围绕城市污水厂尾水特点,通过文献归纳法,总结强化人工湿地深度处理市政尾水效能的途径,并从优化基质、外加缓释碳源、优化工艺3个方面来主要分析其强化机理,提出了人工湿地深度净化市政尾水的研究重点和难点问题,为提高市政尾水水质和保护水生态环境提供一些途径。
Large discharge of tail water from municipal wastewater treatment plants at home,low reuse rate and high concentration of nitrogen and phosphorus are the main causes of water eutrophication.High concentration of nitrogen and phosphorus in tail water can easily lead to the proliferation of plankton such as algae in water,which can destroy the balance of oxygen consumption and reoxygenation and worsen the water quality.Nitrate nitrogen is the main nitrogen in tail water,and its removal needs organic matter as electron donor,while the C/N of tail water is low,which makes it difficult to purify effectively by conventional process and needs further advanced treatment.Therefore,based on the characteristics of municipal wastewater treatment plant tail water,this paper summarizes the ways to strengthen the efficiency of advanced treatment of municipal tail water by constructed wetland through literature induction,and mainly analyzes its strengthening mechanism from three aspects:substrate optimization,adding slow-release carbon source and process optimization,and puts forward the key and difficult problems in the research of advanced purification of municipal tail water by constructed wetland,which provides some ways to improve the quality of municipal tail water and protect the water ecological environment.
作者
纪伟
朱洺娴
张舒
王文杰
范秀磊
JI Wei;ZHU Mingxian;ZHANG Shu;WANG Wenjie;FAN Xiuei(Xuzhou Water Conservancy Building Design and Research Institute Co.,Ltd.,Xuzhou221000,China;School of Environmental Engineering,Xuzhou University of Technology,Xuzhou221018,China)
出处
《净水技术》
CAS
2024年第6期9-19,共11页
Water Purification Technology
基金
国家自然科学基金青年项目(52000153)
江苏省高等学校基础科学(自然科学)研究重大项目(22KJA610005)
江苏省水利科技项目(2021077)。
关键词
人工湿地
市政尾水
氮磷
低C/N比
深度处理
强化途径
constructed wetland
municipal tailwater
nitrogen and phosphorus
low ratio of C/N
advanced treatment
enhancement approach
