Treatment for thermomechanical (TMP) and groundwood pulping effluents with high solids and organic content.
Pulp and paper wastewater treatment for paper & board mills. Fibre recovery, whitening and effluent management.
Pulp and paper wastewater treatment for Fibre recovery. Fibre recovery, whitening and effluent management.
Treat paper machine white water for Fibre recovery and suspended solids reduction.
Redirecting to our Pulp & Paper Mills industry page with effluent treatment, Fibre recovery, and whitewater solutions.
Mechanical pulp mills generate wastewater with high suspended solids, organic content, and temperature from the refining
Every system is designed for your specific wastewater characteristics, flow profile, and effluent targets. No off-the-shelf assumptions — just validated process engineering.
Equipment selected from manufacturers with proven field performance in similar applications. Duty/standby arrangements and robust construction minimise unplanned downtime.
Design targets are set at 50-70% of consent limits, providing a safety margin for process variation. Continuous monitoring and automated reporting demonstrate compliance.
Intuitive controls, clear instrumentation, and accessible maintenance points reduce training requirements. Standard operating procedures written in plain language.
Direct access to our process engineers for operational advice, troubleshooting, and optimisation. Remote diagnostics and rapid on-site response keep your plant running.
Materials certified to EN 10204 3.1, welding procedures qualified to ISO 9606, and pressure testing to 1.5x design pressure. Full traceability from mill to commissioning.
Our mechanical pulp treatment systems include clarification for solids removal, cooling systems for temperature reductio
Comprehensive analysis of wastewater volume, quality, temperature, and variability informs process selection and equipment sizing for optimal performance.
Treatment train selected from screening, DAF, biological, filtration, and disinfection options based on effluent targets, footprint, and Capital expenditure constraints.
Materials, pumps, blowers, and instruments specified for the specific duty conditions, chemical environment, and operational maintenance capabilities.
PLC-based control with online monitoring automates chemical dosing, aeration, and sludge withdrawal. Remote access provides 24/7 oversight.
Site acceptance testing verifies mechanical, electrical, and process performance. Operator training ensures confident day-to-day management.
Contractual effluent targets with financial backing demonstrate our confidence. Monthly reporting proves continuous compliance for regulators and stakeholders.
Treatment systems achieve 90%+ suspended solids removal and 85%+ BOD reduction, ensuring compliance with discharge requi
Achieves 85-98% COD reduction depending on process selection and influent characteristics. Anaerobic pre-treatment followed by aerobic polishing delivers the highest removal rates.
Total suspended solids reduced to below 10-30 mg/L through coagulation, flocculation, and physical separation. Lamella and DAF clarification provide consistent solids removal.
Fat, oil, and grease reduced to below 5-15 mg/L using CPI separators, DAF, and biological degradation. Pre-treatment protects downstream processes from fouling.
Ammonia-N below 5-10 mg/L and total phosphorus below 1-2 mg/L achieved through biological nitrification-denitrification and chemical precipitation with ferric salts.
Effluent pH maintained within 6.5-8.5 through automated acid/alkali dosing with inline probe control. Buffer tanks prevent pH shock to receiving waters.
Systems designed for peak flows of 1.5-3x average daily flow with hydraulic capacity to handle diurnal variation without bypass or loss of treatment quality.
Pulp and paper mill effluent contains lignin, cellulose fibres, extractives, bleaching chemicals, and high COD loads. Treatment must address colour, toxicity from chlorinated organics (AOX), and high solids content while enabling water recycling to reduce freshwater intake. Our integrated solutions combine primary fibre recovery, biological treatment, and advanced oxidation for colour and AOX removal.
Save-all systems and DAF units recover valuable fibre for return to the paper machine.
Closed-loop water circuits reduce freshwater consumption by 60-90% in modern mills.
Advanced oxidation and anaerobic biological processes reduce chlorinated organics below discharge limits.
Specialised coagulants and ozone treatment decolourise effluent for receiving water protection.
| COD Range | 1,500 – 15,000 mg/L (kraft bleaching at higher end) |
| BOD Loading | 300 – 2,500 mg/L |
| TSS Loading | 100 – 1,500 mg/L (fibre loss dependent) |
| AOX Loading | Up to 15 kg AOX/tonne pulp (ECF bleaching) |
| pH Range | 6.0 – 10.0 (alkaline extraction stage influence) |
| Temperature | 30 – 60°C (hot process water) |
| Water Reuse Target | 10 – 50 m³/tonne paper (modern closed circuits) |
| Sludge Yield | 0.3 – 0.6 kg DS/kg COD removed |
EU BREF for pulp and paper production guides Best Available Technique selection.
Effluent quality supports good ecological status of receiving waters.
Evaporation and crystallisation options for mills targeting complete water recycling.
Our experts can design a system tailored to your specific requirements.
Our expertise spans multiple industries with sector-specific water treatment solutions.