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In order to implement the decisions and deployments of the Central Committee of the Communist Party of China and the State Council regarding the utilization of wastewater resources, promote the recycling of industrial wastewater, enhance the level of intensive and economical utilization of industrial water resources, and facilitate the comprehensive and green transformation of the economy, in accordance with the "Guiding Opinions on Promoting the Utilization of Wastewater Resources" (Revised by the National Development and Reform Commission and the Ministry of Ecology and Environment, Document No. 13 of 2021), this implementation plan is hereby formulated.

 

I. Main Objectives.

 

By 2025, it is expected that the reuse rate of industrial water for large-scale enterprises will reach approximately 94%, with further improvement in the reuse rate of industrial water in industries such as steel, petrochemicals and chemicals, non-ferrous metals, papermaking, textile and food. The reuse rate of industrial water in these industries will increase by more than 5 percentage points compared to 2020. The municipal recycled water volume for industrial use will increase significantly, and the water consumption per unit of industrial output value will decrease by 16% compared to 2020. A new pattern of efficient wastewater recycling in major water-consuming industries will be basically formed.

 

II. Key Tasks

 

(1) Focus on key industries and implement the action for improving wastewater recycling. Focus on industries such as petrochemicals, steel, non-ferrous metals, papermaking, textile and food, which have large wastewater discharge volumes, relatively mature renovation conditions and significant demonstration and leading roles. Steadily promote the technological transformation and upgrading of wastewater recycling. Prepare typical industry wastewater recycling route maps, implement comprehensive measures and industry-specific promotion to increase water reuse rates and reduce wastewater discharge volumes.

 

Petrochemical industry: Strengthen water consumption intensity control and carry out water audits, water balance tests, and water-saving diagnosis in key water-consuming sub-sectors such as refining, modern coal chemical industry, olefin, aromatic hydrocarbon, methanol, fertilizer, chlorine, soda ash, sulfuric acid, and coatings. Release water efficiency "leadership" indicators for key products and promote water efficiency benchmarking and water-saving technological transformation for key water-consuming enterprises. Encourage qualified parks to implement wastewater "classification collection, quality treatment, one enterprise one pipeline, clear pipeline transportation, real-time monitoring" for chemical enterprises. Vigorously promote advanced equipment and technology for wastewater recycling such as electrochemical circulating water treatment, high-concentration organic wastewater treatment reuse, water pipe leakage detection, and smart water usage control systems, and reduce wastewater discharge volumes. By 2025, the reuse rate of industrial water in the petrochemical industry for large-scale enterprises will be >94%.

 

Steel industry: Strengthen industry water-saving management and assessment, strengthen water consumption intensity control, and actively promote water efficiency benchmarking and water-saving technological transformation. Promote advanced equipment and technology for wastewater recycling such as efficient circulating water treatment, dry and semi-dry cooling or washing of production processes, high-concentration organic wastewater reuse, reduction of high-salt wastewater, and intelligent water usage. Implement rainwater and sewage separation technology transformation for drainage networks. Create a model of integrated production and city, and encourage steel enterprises to increase the use of urban recycled water. By 2025, the reuse rate of industrial water in the steel industry for large-scale enterprises will be >97%.

 

Non-ferrous metals industry: Strengthen water consumption intensity control and formulate policies to encourage efficient use of water resources. Actively promote water-saving technological transformation and improve the networked and intelligent allocation system for parallel water use and wastewater subgrade and quality reuse. Promote advanced equipment and technology for wastewater recycling such as deep treatment and reuse of non-ferrous metal smelting heavy metal wastewater, and resource utilization of high-salt wastewater. By 2025, the reuse rate of industrial water in the non-ferrous metals industry for large-scale enterprises will be >94%.

 

Textile industry: Strengthen the construction of wastewater recycling capacity, encourage enterprises such as chemical fiber manufacturing, jet weaving, and textile dyeing and finishing to implement water-saving enterprises and water efficiency leading action, and conduct water balance tests and water efficiency benchmarking. Vigorously promote advanced equipment and technology for wastewater recycling such as stepwise utilization of washing water, efficient utilization of chemical fiber filament weaving wastewater, and membrane-based deep treatment of printing and dyeing wastewater. Encourage textile enterprises to increase the development of unconventional water resources such as reclaimed water, and strictly control new water intake. Carry out water quality monitoring and evaluation for wastewater recycling and water usage management, and promote key water-consuming enterprises to build intelligent management platforms for wastewater recycling. By 2025, the reuse rate of industrial water in the textile industry will be >78%.

 

Paper industry: Increase the promotion and application of advanced and applicable technologies and equipment for wastewater recycling. Vigorously promote technologies such as alkali recovery and the分级 and reuse of cold condensate water from evaporation stations， the recycling of pulping water from chemical mechanical pulp or waste paper pulp， and the staged and closed screening of water use in pulping and papermaking production. Promote technologies such as wastewater recycling for raw material preparation， low-karbon value cooking， multi-stage counter-flow washing and closed screening， oxygen removal lignin， no-element chlorine or fully chlorine-free bleaching， and closed circulation utilization of paper machine water. Promote equipment and technology processes such as efficient sedimentation and filtration white water recovery， the reverse use of bleaching wash liquor， high-pressure spraying， turbine fans， and high-concentration technologies and process intelligent control in the production process. By 2025， the reuse rate of industrial water in the paper industry will be >87%.

 

Food industry： Vigorously promote the treatment of high-concentration organic wastewater， high-salt wastewater， and fermentation high-concentration wastewater for use in boiler water (softened water， slag washing)， ground flushing， and factory greening， reducing organic matter emissions and improving industry water efficiency. By 2025， the reuse rate of industrial water in the food industry will be >65%.

 

(II) Persist in innovation-driven development， tackle a number of key core equipment and technology processes.

 

Deploy key research on industrial wastewater recycling technologies， incorporating them into the national medium- and long-term science and technology development plan， the "14th Five-Year" industrial scientific and technological innovation development plan， and the scientific and technological innovation plan in the field of environmental protection. Support enterprises and research institutions to break through a number of key core materials and process technologies such as industrial high-performance membranes and components， green water treatment agents， and the recycling of high-concentration difficult-to-degrade organic wastewater. Select representative parks to carry out comprehensive technology integration and demonstrations， and develop integrated low-cost and high-performance industrial wastewater recycling equipment and technology processes to create a demonstration model where the technology， engineering， management， and policies of industrial wastewater recycling work together to exert their effects.

 

Key core technology research directions

 

Petrochemical and chemical industry： Break through key core technologies such as deep oil removal and pre-treatment of phenol and ammonia wastewater in coal chemical industry， synchronous oil and turbidity removal and reuse treatment of coal chemical production wastewater， turbidity circulation in modern coal chemical industry， spiral/centrifugal separation-crystallization purification wastewater resource utilization， single-element salt separation from high-salt wastewater， desalination and concentration evaporation of high-salt organic wastewater， catalytic wet oxidation treatment of containing salt wastewater， efficient steam and resource utilization of ammonia wastewater， low-energy consumption biofilm treatment， membrane-based low-concentration industrial wastewater resource utilization， and deep anaerobic biological treatment of wastewater.

 

Steel industry： Break through key core technologies such as deep treatment and reuse of coke oven wastewater， deep treatment and reuse of cold rolling wastewater， efficient cooling of circulating water， high-concentration multiple-stage circulating water treatment， online monitoring of water quality stability in the circulating water system， deep treatment and reuse of desulfurization wastewater， single-element salt separation from high-salt wastewater， desalination and concentration evaporation of high-chlorine wastewater， catalytic wet oxidation treatment of wastewater with ammonia， and zero discharge and resource utilization of wastewater.

 

Non-ferrous metals industry： Break through key core technologies such as deep treatment and reuse of heavy metal wastewater in non-ferrous smelting， recovery and resource utilization of high-salt wastewater in wet metallurgy， resource utilization and treatment of heavy metal metallurgical acid wastewater， and low-energy consumption biofilm treatment.

 

Textile industry： Break through key core technologies such as catalytic oxidation and efficient treatment and reuse of dyeing wastewater， deep treatment and reuse of long-staple fabric weaving wastewater， and efficient reverse osmosis treatment of reclaimed water.

 

Paper industry： Break through key core technologies such as multi-stage purification and deep recycling of new paper wastewater.

 

Food industry： Break through key core technologies such as high-concentration evaporation and dehydration drying of food with ultra-low VOCs emissions. The organization selects and releases a directory of industrial water-saving processes, technologies and equipment that are encouraged by the state, as well as a directory of major environmental protection technologies and equipment. It formulates promotion plans for industrial wastewater recycling technologies and guidelines for supply-demand matching. Focusing on water-deficient areas such as the Beijing-Tianjin-Hebei region, the Yellow River Basin, and the Yangtze River Economic Belt, as well as water-sensitive areas, it vigorously promotes a number of advanced and applicable wastewater recycling technologies and equipment in key water-consuming industries. It encourages localities and industries to explore new mechanisms for promoting the promotion of industrial wastewater recycling technologies, and vigorously promotes industrial wastewater recycling technologies. By 2025, 100 advanced and applicable industrial wastewater recycling technologies and equipment will be promoted.