Project Overview
This integrated water treatment project was installed at the manufacturing facility of Chengdu Xinhai Gongcheng Technology and consists of two independent systems:
- Semiconductor wastewater treatment system: 2 m³/h
- Industrial pure water production system: 32 m³/h
The wastewater treatment system complies with the Indirect Discharge Requirements of GB 39731-2020 – Discharge Standard of Water Pollutants for Electronic Industry, allowing compliant discharge to the municipal wastewater network.
Wastewater Treatment Process
Wastewater Equalization → pH Neutralization → Coagulation → Clarification → Multimedia Filtration → Activated Carbon Filtration → Precision Cartridge Filtration → Compliant Discharge
Pure Water Production Process
Raw Water Pretreatment → Multi-stage Purification → Industrial Pure Water Supply
The integrated solution simultaneously guarantees high-quality production water and compliant wastewater discharge for semiconductor manufacturing operations.
Automation Features
The system is equipped with a fully automated PLC control platform featuring:
- Online water quality monitoring
- Automatic chemical dosing
- Intelligent equipment start/stop
- Continuous 24-hour operation
- Stable performance under varying operating conditions
- Low maintenance requirements
Designed for continuous semiconductor manufacturing, the system provides reliable operation with minimal operator intervention.
Applications
This integrated water treatment solution is specifically designed for:
- Semiconductor manufacturing
- IC packaging and testing facilities
- Microelectronics production
- Precision electronic component manufacturing
- Semiconductor R&D laboratories
Suitable wastewater sources include:
- Chip etching wastewater
- Wafer cleaning wastewater
- Grinding and polishing wastewater
- Mild organic process wastewater
- Acidic and alkaline cleaning wastewater
The accompanying pure water system supplies high-quality process water required for semiconductor production, enabling manufacturers to achieve both production water quality and environmental compliance.
The solution is particularly suitable for:
- New semiconductor manufacturing facilities
- Water treatment system upgrades
- Integrated pure water and wastewater treatment projects
- Compliance projects meeting GB 39731-2020
- Semiconductor facilities throughout Southwest China
Project Description
Chengdu Xinhai Gongcheng Technology specializes in semiconductor chip research, packaging, and precision manufacturing. Its production processes require a continuous supply of high-purity process water while simultaneously generating semiconductor process wastewater from equipment cleaning and manufacturing operations.
Following the implementation of GB 39731-2020 – Discharge Standard of Water Pollutants for Electronic Industry, the customer's existing treatment facilities were no longer capable of consistently meeting the new indirect discharge requirements. To ensure regulatory compliance while maintaining reliable production water supply, the company required a fully integrated solution combining wastewater treatment and industrial pure water production.
Based on the plant's operating conditions and the latest regulatory requirements, BHP designed a comprehensive water treatment system consisting of a 2 m³/h wastewater treatment facility integrated with a 32 m³/h industrial pure water production system.
The wastewater treatment process begins with an equalization tank that balances flow and wastewater characteristics, minimizing hydraulic and pollutant fluctuations. The wastewater then undergoes precise pH adjustment and neutralization, followed by the addition of specialized coagulants to remove suspended solids, fine organic contaminants, and colloidal particles through coagulation and clarification.
After clarification, the treated water passes through a series of multimedia filters, activated carbon filters, and precision cartridge filters, providing advanced polishing and ensuring consistent compliance with the indirect discharge requirements specified by GB 39731-2020.
The accompanying 32 m³/h industrial pure water system supplies high-quality process water for semiconductor manufacturing, precision cleaning, and related production processes, helping maintain product quality and manufacturing yield.
Both systems are integrated into a compact, fully automated platform featuring PLC-based intelligent controls, automatic process management, and unattended operation. The integrated design minimizes operating costs while providing reliable long-term performance.
Since commissioning, the project has consistently achieved stable wastewater discharge fully compliant with GB 39731-2020, while continuously supplying high-quality industrial pure water for production. The integrated solution has enabled the customer to successfully meet environmental inspection requirements, improve production reliability, and achieve simultaneous compliance in both water supply and wastewater management.
Today, the project serves as an excellent reference for integrated wastewater treatment and pure water systems for small and medium-sized semiconductor manufacturers in Chengdu and throughout Southwest China.
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