[1]罗嘉豪,金鑫,唐茂森,等.基于电絮凝工艺的洗衣废水深度处理与再生利用[J].中国给水排水,2024,40(23):84-90.
　LUOJia-hao,JINXin,TANGMao-sen,et al.Advanced Treatment and Recycling of Laundry Wastewater Utilizing Electrocoagulation Process[J].China Water & Wastewater,2024,40(23):84-90.
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基于电絮凝工艺的洗衣废水深度处理与再生利用

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第23期 页码: 84-90 栏目: 出版日期: 2024-12-01
Title:
Advanced Treatment and Recycling of Laundry Wastewater Utilizing Electrocoagulation Process
作者:
罗嘉豪1,2， 金鑫1， 唐茂森2， 许路1， 商亚博1， 金鹏康1,2
（1.西安交通大学 人居环境与建筑工程学院，陕西 西安 710049；2.西安建筑科技大学 环境与市政工程学院，陕西 西安 710055）
Author(s):
LUO　Jia-hao1，2， JIN　Xin1， TANG　Mao-sen2， XU　Lu1， SHANG　Ya-bo1， JIN　Peng-kang1，2
（1. School of Human Settlements and Civil Engineering， Xi’an Jiaotong University， Xi’an 710049， China； 2. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
关键词:
洗衣废水;  电凝聚臭氧氧化耦合工艺;  电絮凝;  微塑料
Keywords:
laundry wastewater;  electro-hybrid ozonation-coagulation electrocoagulation;  microplastics
摘要:
以洗衣废水的深度处理与再生利用为目的，通过多种工艺比选，发现以电絮凝（EC）为核心的工艺对COD的去除效果显著优于其他工艺；在以EC为核心的耦合工艺及串联工艺的基础上，进一步优选出了以碳纤维极板为阴极、铝极板为阳极的电凝聚臭氧氧化耦合工艺（C-E-HOC），探究了该工艺对洗衣废水中COD、浊度及阴离子表面活性剂（LAS）的去除效果及最佳运行条件。结果表明，在电流密度为15 mA/cm2、臭氧流量为400 mL/min的最佳条件下，C-E-HOC工艺对洗衣废水中COD、浊度及LAS的去除率分别可达到97.6%、99.9%和99.6%，出水水质满足《城市污水再生利用 城市杂用水水质》（GB/T 18920—2020）和《城市污水再生利用 工业用水水质》（GB/T 19923—2005）标准要求。同时，分析了C-E-HOC工艺去除COD与LAS的反应动力学特性。另外，考察了洗衣废水中微塑料的排放情况，结果显示，在家庭日常洗涤过程中，每100 L水向环境中排放的微塑料数量为（40~150）×104 个，C-E-HOC工艺对微塑料的去除率可达到94.2%。
Abstract:
In the context of advanced treatment and recycling of laundry wastewater, it was observed that electrocoagulation (EC) served as the core process with a significantly superior COD removal efficiency compared to alternative methods. Building upon the coupling and series processes centered around EC, this paper further optimized the electro-hybrid ozonation-coagulation (C-E-HOC) that utilized a carbon fiber electrode plate as the cathode and an aluminum electrode plate as the anode, and investigated the process’s efficacy in removing COD, turbidity, and anionic surfactants (LAS) from laundry wastewater, while also exploring its optimal operating conditions. Under the optimal conditions characterized by the current density of 15 mA/cm2 and the ozone flow rate of 400 mL/min, the C-E-HOC process demonstrated removal efficiencies for COD, turbidity and LAS in laundry wastewater reaching 97.6%, 99.9%, and 99.6%, respectively. The effluent quality complied with the limits specified in The Reuse of Urban Recycling Water—Water Quality Standard for Urban Miscellaneous Use (GB/T 18920-2020) as well as The Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses (GB/T 19923-2005). Meanwhile, the reaction kinetics characteristics of COD and LAS removal in the C-E-HOC process were analyzed. Furthermore, the release of microplastics in laundry wastewater was investigated. The findings indicated that the quantity of microplastics discharged into the environment during a typical household washing process amounted to (40-150)×104 per 100 liters of water, while the C-E-HOC process demonstrated a removal efficiency for microplastics reaching up to 94.2%.
更新日期/Last Update: 2024-12-01