Pulp and paper mills are among the largest industrial water users. Learn about effective wastewater treatment and water reuse solutions for the paper industry.

Paper Mill Wastewater Characteristics

• High BOD/COD: 200-2000/400-4000 mg/L
• Lignin compounds: Dark color, slow to degrade
• Fiber and suspended solids: 200-1500 mg/L
• Chlorinated compounds: From bleaching
• Variable flow: Batch operations

Treatment Process Flow

Primary Treatment

• Screen and dewater fiber recovery
• Sedimentation/flotation for solids
• Equalization tank for flow balancing

Biological Treatment

• Activated sludge – BOD removal
• Sequencing batch reactor (SBR)
• Anaerobic treatment – energy recovery
• Combined aerobic/anaerobic systems

Tertiary Treatment

• Filtration for color removal
• Activated carbon for organics
• Ultrafiltration for reuse

Water Reuse Opportunities

• Shower screens and seal water
• Stock preparation
• Cooling tower makeup
• High-pressure washer makeup

Environmental Benefits

• Reduce fresh water consumption by 50-80%
• Meet discharge permit limits
• Reduce treatment costs

Pulp and paper wastewater solutions? Contact us for custom treatment systems.

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