Paper and pulp mills generate significant wastewater with high BOD, COD, color, and chlorinated compounds from bleaching processes.

Pulp Mill Wastewater Characteristics

• High BOD: 200-2,000 mg/L
• High COD: 500-5,000 mg/L
• Color from lignin compounds
• Chlorinated organic compounds from bleaching
• High temperature (thermo-mechanical processes)

Regulatory Drivers

Environmental regulations require significant pollutant reduction. Water reuse is increasingly important for cost reduction.

Treatment Technologies

Primary Treatment

Screening, flotation, and clarification for suspended solids and fiber recovery.

Biological Treatment

Activated sludge, sequential batch reactors, or biofilm systems for organic removal. Anaerobic treatment can reduce capital costs and generate biogas.

Color Removal

Coagulation-flocculation, membrane filtration, or advanced oxidation for persistent color compounds.

Water Reuse in Pulp Mills

• Countercurrent washing
• Closed-loop systems in some areas
• Treated effluent for irrigation or cooling

Feiran EP Pulp and Paper Solutions

We supply complete wastewater treatment systems for paper and pulp industry applications.

Email: sale@yixingenviroequipment.com