It is widely acknowledged that the wastewater treatment facilities of numerous small-scale paper-making mills deliver unsatisfactory treatment performance. What are the root causes? Primarily, these plants suffer from high operating costs coupled with unstable effluent water quality. As industry specialists in this field, what effective measures can be adopted to boost paper-making wastewater treatment efficiency?

The aforementioned problems mainly stem from three factors: flawed engineering design, improper operational practices, and a failure to integrate wastewater management with cleaner production processes. Nevertheless, there are successful reference cases with stable and effective treatment results. A case study of a paper-making mill in Henan Province is briefly outlined below.

This mill independently constructed a complete wastewater treatment system with a daily processing capacity of 3,000 cubic meters. The system adopts the widely recognized activated sludge biological treatment process, which features a straightforward process layout and convenient daily operation. After more than one year of continuous operation, the chemical oxygen demand (CODCr) of its effluent has remained consistently below 80 mg/L, fully complying with official acceptance discharge standards.

So what concrete steps can be taken to enhance papermaking wastewater treatment performance? First and foremost, a comprehensive and standardized management system for the wastewater station must be established. Wastewater treatment should be regarded as an indispensable segment of the entire papermaking production workflow. Operators with solid educational backgrounds and professional technical expertise shall be assigned to oversee daily operation and management, with rigorous oversight of every operational detail to guarantee stable and consistent operation of the wastewater treatment system.

Simply put, achieving optimal wastewater treatment outcomes hinges on three core pillars: sound and rational process design, deep integration with cleaner production to minimize pollutant inflow and maximize pollutant removal, and stringent, meticulous scientific management.

In addition, disinfection and sterilization procedures are essential for treated wastewater. How can we evaluate whether these disinfection measures work as intended? Reliable water quality monitoring is indispensable. Specialized Water Quality Monitoring Equipment is deployed to test all key indicators of papermaking wastewater. Data generated through continuous monitoring serves as the basis for verifying whether the treated wastewater meets discharge standards. Discharge is only permitted after full compliance is confirmed.