城市雨水高效截污净化试验研究

李振华

doi:10.13205/j.hjgc.202412014

城市雨水高效截污净化试验研究

doi: 10.13205/j.hjgc.202412014

李振华

厦门大学嘉庚学院河口生态安全与环境健康福建省高校重点实验室, 福建漳州 363105

基金项目:

漳州市自然科学基金项目(ZZ2021J35)

详细信息

作者简介:
李振华(1984-),男,副教授,主要研究方向为水污染控制。1438164@qq.com

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出版历程
- 收稿日期: 2023-05-10
- 网络出版日期: 2025-01-18

AN EXPERIMENTAL STUDY ON HIGH EFFICIENCY INTERCEPTION AND PURIFICATION FOR URBAN RAINWATER

LI Zhenhua

Key Laboratory of Estuarine Ecological Security and Environmental Health, Fujian Province, Tan Kah Kee College, Xiamen University, Zhangzhou 363105, China

摘要

摘要: 针对受污染雨水直排水体造成水环境污染,构建了可无人值守的以物化处理为主的一体化雨水集蓄净化装置。通过雨水集蓄、混凝剂投加、曝气搅拌和静置沉淀等操作,装置对受污雨水进行了强化混凝沉淀处理。结果表明:3种不同浓度受污雨水,分别投加聚合氯化铝150,200,250 mg/L,水力停留时间4.5 h时,SS、COD和TP去除率均分别高于95%、75%和72%,出水SS、COD和TP达到GB 18918—2002《城镇污水处理厂污染物排放标准》一级B标准。同时,对总锌和总铅去除率均在82%以上,对总铝去除率在73%以上,且出水总锌和总铅远低于GB 18918—2002最高允许排放浓度。此外,曝气搅拌时雨水ρ(DO)峰值为9.04 mg/L,处理后出水ρ(DO)为3.75 mg/L。装置处理成本为0.08~0.11 元/m³,实现了混合、反应和分离一体化过程协同,达到了技术上可行和经济上合理的要求。
- 雨水 /
- 截污 /
- 混凝 /
- 曝气搅拌 /
- 溶解氧
Abstract: In response to the water environment pollution caused by direct discharge of polluted rainwater into water bodies, an integrated collection and purification facility of rainwater was developed based on physical-chemical treatment in an unattended manner. The enhanced coagulation and sedimentation had been conducted onto the polluted rainwater by the facility’s operations such as rainwater collection, coagulant addition, aeration stirring and sedimentation. The study results showed that when PAC, with dosages of 150, 200, and 250 mg/L were respectively added to the polluted rainwater of three different concentrations, and the hydraulic retention time was 4.5 hours, the removal efficiencies of SS, COD and TP were more than 95%, 75% and 72%, respectively. The SS, COD and TP in effluent met the Class I-B standard of GB 18918—2002. Meanwhile, over 82% of total zinc and total lead removal rates were achieved by the facility, and the removal efficiency for total aluminum was 73% above. Moreover, the mass concentration of total zinc and total lead in the effluent of the facility was much lower than the maximum allowable emission concentration in GB 18918—2002. Additionally, the peak mass concentration of dissolved oxygen could reach 9.04 mg/L during the aeration stirring phase. The mass concentration of dissolved oxygen in discharged water was 3.75 mg/L. The treatment cost of the facility was RMB 0.08~0.11 yuan/m³ of polluted rainwater. The processes of mixing, reaction and separation were integrated through the facility, which realized the requirements of technical feasibility and economic rationality.
- rainwater /
- interception /
- coagulation /
- aeration stirring /
- dissolved oxygen

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