General Approach

Industrial wastewater treatment standard upgrade follows a four-step progressive strategy: “Current Situation Diagnosis → Problem Identification → Process Optimization → Advanced Enhancement.” Targeting the challenge of existing treatment facilities failing to meet new discharge standards, stable compliance is achieved through process upgrades, equipment renewal, and operational optimization.

Core Technical Routes

① Site Investigation + Comprehensive Water Quality Analysis: Conduct thorough investigation of actual influent water quality, flow fluctuations, and operational parameters of existing facilities to identify major exceedance factors and their sources. Applicable to feasibility studies and scheme design during the preliminary phase of upgrade projects.

② Biological System Enhancement (MBR / MBBR / Magnetic Loaded Flocculation): Upgrade conventional activated sludge processes to MBR membrane bioreactors, MBBR suspended carrier fluidized beds, or magnetic loaded flocculation systems to improve biological treatment efficiency and sludge concentration. Applicable to upgrade projects targeting COD, ammonia nitrogen, and total nitrogen compliance.

③ Advanced Treatment Upgrade (Ozone Catalytic Oxidation + BAF / Activated Carbon): Ozone catalytic oxidation degrades recalcitrant organic compounds. Biological aerated filters or activated carbon provide further removal. Applicable to scenarios where discharge standards impose strict requirements on COD, color, and micropollutants.

④ Membrane-Based Advanced Treatment (UF + RO / NF): Ultrafiltration removes suspended solids and colloids. Reverse osmosis or nanofiltration retains dissolved salts and trace pollutants. Applicable to upgrading high-salinity wastewater treatment to meet Class IV surface water standards or as pretreatment for zero liquid discharge.

⑤ Specialized Phosphorus and Nitrogen Removal Enhancement: External carbon source addition (sodium acetate / methanol / acetic acid) improves denitrification efficiency. Chemical phosphorus removal with PAC is integrated with advanced treatment. Applicable to upgrade projects targeting total nitrogen or total phosphorus compliance.

⑥ Automation Control + Smart Water System Upgrade: PLC and DCS control system upgrades with comprehensive online instrumentation coverage. Smart platforms enable remote monitoring and automated chemical dosing. Applicable to intelligent upgrades aimed at improving operational management and reducing manual intervention.

Key Considerations

The core principle of industrial wastewater treatment standard upgrade is “Identifying Bottlenecks and Applying Targeted Solutions.” Bench-scale or pilot testing must be conducted prior to upgrade implementation to verify the effectiveness of new processes on target pollutants, avoiding investment waste from indiscriminate adoption of new technologies. Comprehensive economic benefit assessment should also be integrated into decision-making.