摘要
温州某皮革厂针对生产用水消耗大、重复利用率要求高的问题,采用水解酸化+两级AO+MBR工艺处理经过精馏/脱酸处理后的冷凝水(含有N,N-二甲基甲酰胺,即DMF),平均出水COD为56 mg/L、氨氮为0.5 mg/L、TN为3.5 mg/L、悬浮物为0.5 mg/L、色度为8倍,满足皮革厂对回用水水质的要求。将该工艺产水回用至生产车间凝固槽作为补充水,实现对冷凝水的100%重复利用率。整个项目自建成运营以来,废水处理效果稳定,实际处理水量为360 m^(3)/d,工程建设费用为950万元,处理费用为9.05元/m^(3),具有一定的环境效益和经济效益。
In response to the high water consumption and high requirements for water reuse in leather factory production,we use the hydrolysis acidification+two‑stage AO+MBR process to treat the condensed water containing DMF after distillation/deacidification treatment from a leather factory in Wenzhou.The average concentration of pollutants in the process water is:COD 56 mg/L,NH3-N 0.5 mg/L,TN 3.5 mg/L,SS 0.5 mg/L,and the chromaticity of 8 times.The effluent quality meets the requirements of the leather factory owner for recycled water quality.Reusing the process water to the solidification tank in the production workshop as supplementary water achieved a 100%reuse rate of condensed water.Since the completion and operation of the project,the wastewater treatment effect has been stable,with a actual processing water volume of 360 m^(3)/d,the construction cost is 9.5 million yuan,and the water treatment cost is 9.05 yuan/m^(3),which has certain economic value and environmental benefits.
作者
杨青
任昆鹏
杨辉
赵刚强
赵舒琪
张龙飞
YANG Qing;REN Kun‑peng;YANG Hui;ZHAO Gang‑qiang;ZHAO Shu‑qi;ZHANG Long‑fei(Zhejiang Hi‑tech Environmental Technology Co.Ltd.,Hangzhou 311100,China;Shenergy Environmental Technologies Co.Ltd.,Hangzhou 311100,China)
出处
《中国给水排水》
北大核心
2025年第18期126-131,共6页
China Water & Wastewater
