Chemical wastewater refers to the wastewater produced in the process of producing products in chemical plants, such as the oily wastewater produced in the production of ethylene, polyethylene, rubber, polyester, methanol, ethylene glycol, oil tank farms, air separation air compressor stations and other devices.

The direction of industrial wastewater recycling standard improvement

l Commonality: technical specifications for deep purification and nanofiltration of industrial wastewater, technical specifications for qualitative water and cascade water, technical specifications for comprehensive reuse of reverse osmosis wastewater, reclaimed water technology for ultrafiltration systems, enterprise water balance test methods, performance evaluation guidelines for water reuse in industrial parks, evaluation methods for urban reclaimed water treatment technology for industrial use, etc. 

l Petrochemical industry: technical guidelines and guidelines for wastewater reuse in chemical enterprises, technical specifications for deep reuse of chemical wastewater by double membrane method, technical requirements for advanced treatment and reuse of oil refining wastewater, etc. 

l Iron and steel industry: implementation guide for advanced treatment and reuse of wastewater in iron and steel enterprises, technical specifications for the treatment and reuse of sintering flue gas wet desulfurization wastewater, technical specifications for concentrated brine treatment and reuse in the iron and steel industry, technical specifications for the advanced treatment and reuse of comprehensive wastewater in iron and steel enterprises, technical requirements for the water quality of comprehensive wastewater reuse in iron and steel enterprises, sintering desulfurization wastewater circulation system, coking phenol cyanide wastewater treatment and reuse system, cold rolling wastewater treatment and reuse system, and technical requirements for the operation of comprehensive wastewater reuse facilities in iron and steel enterprises. 

l Textile industry: water balance test guidelines for textile enterprises, water quality requirements for water reuse in water jet weaving process, technical guidelines for advanced treatment and reuse of printing and dyeing wastewater, etc. 

l Food industry: water balance test guidelines for food enterprises, water footprint accounting and evaluation, etc

The six departments jointly issued the "Implementation Plan for Industrial Wastewater Recycling"

In order to implement the "Guiding Opinions on Promoting the Resource Utilization of Wastewater" (Fagai Huan Zi [2021] No. 13) issued with the consent of the State Council, build a "1+N" policy system for the utilization of sewage resources, and actively promote the resource utilization of industrial wastewater, recently, the Ministry of Industry and Information Technology, the National Development and Reform Commission and other six departments jointly issued the "Implementation Plan for Industrial Wastewater Recycling" (hereinafter referred to as the "Implementation Plan"), proposing to strive for the reuse rate of industrial water above designated size to reach about 94% by 2025. The reuse rate of industrial water above designated size in steel, petrochemical and nonferrous metals industries has been further improved, the reuse rate of industrial water above designated size in textile, papermaking, food and other industries has increased by more than 5 percentage points compared with 2020, the municipal reclaimed water for industrial use has increased significantly, and the water consumption per 10,000 yuan of industrial added value has decreased by 16% compared with 2020, basically forming a new pattern of efficient recycling of wastewater in major water-using industries.

The "Implementation Plan" puts forward specific tasks in seven aspects. The first is to focus on key industries and implement actions to improve wastewater recycling. Promote the transformation and upgrading of wastewater recycling technology in petrochemical, steel, nonferrous metals, papermaking, textile, food and other industries. Compile a roadmap for wastewater recycling in typical industries to improve the reuse rate of industrial water. The second is to adhere to innovation-driven and tackle a number of key core equipment technologies. Deployers