T/GXDSL 058-2025 The acceptance standard for zero discharge technology of industrial wastewater

Scope

Main Technical Content: This standard comprehensively stipulates the acceptance technical requirements and evaluation criteria for zero-discharge technology of industrial wastewater, and is applicable to the design, construction, commissioning, and operation of all types of zero-discharge projects for industrial wastewater. In terms of industry applicability, this standard focuses on wastewater zero-discharge projects in high-water-consumption industries such as chemical (COD≤50mg/L), pharmaceutical (TN≤15mg/L), dyeing (colority≤30 times), electroplating (heavy metals≤0.5mg/L), steel (total cyanide≤0.5mg/L), and papermaking (AOX≤0.5mg/L), with a treatment scale of ≥100m3/d and an annual system operation time of ≥8000h. In terms of technical system, this standard specifies the acceptance indicators for key process units such as pretreatment (SS removal rate≥95%), membrane integration (desalination rate≥98%), evaporation crystallization (crystallization rate≥90%), and sludge dewatering (water content≤60%), as well as overall performance requirements such as system integration (water reuse rate≥95%), energy consumption (comprehensive energy consumption≤2.5kWh/t water), and environmental management (pollutant compliance rate100%). The acceptance process should include a 72-hour continuous operation test (water quality compliance rate≥99%), a 30-day stability assessment (equipment failure rate≤0.5%), and an annual performance evaluation (membrane element replacement cycle≥3 years). In terms of special circumstances, for industrial wastewater containing radioactive substances (total α≤0.1Bq/L, total β≤1Bq/L), supplementary acceptance clauses may be formulated in accordance with the Radioactive Pollution Prevention and Control Law on the basis of meeting the basic requirements of this standard; for high-concentration organic wastewater (COD≥5000mg/L), specialized acceptance clauses for process units such as advanced oxidation (COD

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