The optimization direction of environmental protection measures of the finished product cleaning system can focus on eight core areas: etching solution recycling, wastewater treatment and reuse, waste gas treatment, solid waste resource utilization, clean production and process improvement, construction of environmental protection management system, green supply chain management, policy compliance and technological innovation. The specific optimization directions are as follows

I. Recycling and Reduction of Etching Solution

Etching solution reuse system: Introduce etching solution regeneration and circulation equipment, and through methods such as extracting copper ions and replenishing the solution, achieve multiple reuses of the etching solution.

Automatic addition and concentration control: An automatic addition device is adopted to precisely control the concentration of the etching solution, avoiding concentration fluctuations caused by manual operation and reducing the amount of solution carried out.

New etching agent substitution: Develop environmentally friendly etching agents to reduce the use of heavy metals (such as chromium and iron) and chelates in traditional acid-base etching agents, and lower the difficulty and cost of waste liquid treatment.

Ii. Wastewater Treatment and Reuse

Classified collection and quality-based treatment: Copper-containing wastewater, organic wastewater, high-concentration wastewater, etc. are collected separately, and targeted treatment is carried out using technologies such as chemical precipitation, ion exchange, and membrane separation to enhance treatment efficiency.

Reclaimed water reuse system: Build reclaimed water reuse facilities to reuse the treated wastewater for non-production processes such as workshop cleaning and green irrigation, with a reuse rate of over 70%.

Online monitoring and compliance with discharge standards: Install online wastewater monitoring equipment to monitor indicators such as pH value, COD, and copper ion concentration in real time, ensuring that wastewater is discharged up to standard.

Iii. Waste Gas Treatment and Emission Reduction

Waste gas collection and treatment: Waste gas generated from processes such as etching and electroplating is collected in a closed manner and treated with technologies like adsorption, catalytic oxidation, and dust removal to reduce the emission of smoke and harmful gases.

Sound insulation and noise reduction equipment: Install sound insulation covers or mufflers on high-noise equipment such as etching machines and fans to reduce noise pollution and improve the working environment.

Iv. Resource Utilization and Harmless Treatment of Solid Waste

Solid waste classification collection: Classify and collect solid waste such as waste etching solution, waste packaging materials, and waste oil, and establish ledgers to record the generation volume, treatment methods, and destinations.

Resource utilization: Cooperate with qualified units to recover and refine valuable metals such as copper from waste etching solutions, achieving resource recycling and reuse.

Harmless treatment: Entrust professional institutions to carry out harmless treatment for non-recyclable solid waste to avoid secondary pollution to the environment.

V. Clean Production and Process Improvement

Dry etching technology: Dry etching is adopted to replace traditional wet etching, reducing the use of chemicals and wastewater discharge, while improving etching accuracy and efficiency.

Water-saving and energy-saving processes: Optimize the process parameters of etching, cleaning and other procedures to reduce water and energy consumption.

Paperless office and energy-saving equipment: Promote paperless office to reduce paper waste; Energy-saving equipment should be selected in areas such as production workshops and staff dormitories to reduce energy consumption.

Vi. Construction of Environmental Protection Management System

Environmental protection goals and assessment: Establish clear environmental protection goals and management measures, incorporate environmental protection indicators into the employee performance assessment system, and ensure the effective implementation of environmental protection measures.

Environmental monitoring and emergency management: Regularly monitor pollutants such as wastewater, waste gas, and noise, establish environmental emergency response plans, and enhance the capacity to deal with sudden environmental incidents.

Vii. Green Supply Chain Management

Supplier environmental protection requirements: Sign environmental protection agreements with suppliers, requiring them to provide environmentally friendly raw materials and auxiliary materials to reduce environmental impact in the supply chain.

Green procurement and logistics: Prioritize the purchase of recyclable and degradable packaging materials, optimize logistics routes and transportation methods, and reduce carbon emissions.

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