WANGXiao-bing,LINYue.Optimization and Practice of Wastewater Zero Discharge Process in a Circular Economy Industrial Park[J].China Water & Wastewater,2022,38(22):116-122.
循环经济产业园废水零排放的工艺优选与实践
- Title:
- Optimization and Practice of Wastewater Zero Discharge Process in a Circular Economy Industrial Park
- Keywords:
- circular economy industrial park; zero discharge; external MBR; advanced treatment; Fenton oxidation
- 摘要:
- 循环经济产业园区主要包括生活垃圾焚烧、餐厨垃圾处理、粪便处理、市政污泥处置等产业，生产过程中会产生大量高浓度、高氨氮有机废水，且园区一般较为偏远，基础设施不完善，环境容量有限，对废水处理会提出严格的排放标准，具体项目甚至会要求处理后尾水零排放。某循环经济产业园的高、低浓度废水分别经过UASB厌氧+外置式MBR+反渗透、生化+沉淀+过滤+反渗透处理后，尾水全部回用于园区。RO浓缩液采用膜减量+芬顿高级氧化+混凝沉淀工艺处理，产生的清液回用，剩余浓缩液作为灰渣冷却水回用。该项目处理规模为3 250 m3/d，投资约95 400元/m3，占地面积为8.45 m2/m3。
- Abstract:
- Circular economy industrial park mainly includes municipal solid waste incineration, food waste treatment, feces disposal and municipal sludge disposal, and etc., which produces much high concentration and high ammonia organic wastewater. And circular economy industrial parks are usually far away from urban area that might have imperfect infrastructures and limited environmental capacity. Thus strict discharge standard is required for wastewater treatment and zero discharge of tail water is even required for specific project. The high concentration wastewater of a circular economy industrial park is treated by UASB, external MBR and RO process, while its low concentration wastewater is treated by biochemical treatment, sedimentation, filter and RO. All the effluent after treatment is recycled totally. RO concentrate is treated by membrane reduction, Fenton advanced oxidation, coagulation and sedimentation. The clear liquor after concentrate treatment is recycled. The residual concentrate is used as slag’s cooling water. The capacity of this plant is 3 250 m3/d. The investment is about 95 400 yuan/m3, and occupied area per unit are 8.45 m2/m3.
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