Efficient recovery of valuable fibres from white water and process streams, reducing raw material costs and improving sustainability.
Pulp and paper wastewater treatment for paper & board mills. 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.
Pulp and paper wastewater treatment for recycled paper mills.
Paper mills lose significant fibre in white water and process streams, representing lost product and increased raw mater
Wastewater streams frequently carry organic loads 5-50x higher than domestic sewage, demanding robust biological or physical-chemical treatment capacity.
Temperature, pH, flow, and concentration swings between production shifts create treatment instability without proper equalisation and buffering.
Shock loads, toxins, or pH extremes can kill beneficial biomass. Protection mechanisms like equalisation and pH correction are essential.
High FOG content causes pipe blockage, flotation cell failure, and membrane fouling. Effective pre-treatment prevents downstream operational issues.
Variable chemical composition from cleaning agents, process chemicals, and raw materials requires adaptable treatment chemistry and dosing control.
Discharge consents are tightening continuously. Treatment must not only meet current limits but accommodate future reductions without major rebuild.
Our fibre recovery systems include savealls, disc filters, and flotation units that efficiently separate and concentrate
Tertiary-treated effluent suitable for cooling towers, washdown, irrigation, and process make-up. Reduces freshwater consumption by 30-70% with appropriate treatment.
Anaerobic treatment of high-COD waste produces 0.35-0.45 m³ biogas per kg COD removed. Can displace 15-30% of natural gas in boilers or generate electricity via CHP.
Concentrated protein streams from rendering and processing can be recovered for animal feed or fertiliser. Screening and DAF concentrate solids for valorisation.
CPI and DAF separators recover valuable fats and oils from wastewater. Recovered tallow and grease have commercial value for biofuel and oleochemical industries.
Treated effluent with controlled nutrient content can be applied to agricultural land as fertiliser. Requires nitrogen and phosphorus balancing to prevent over-application.
Resource recovery outputs and reduced disposal requirements can reduce treatment overheads by 10-30%. Detailed feasibility studies quantify performance targets before investment.
Fibre recovery systems typically deliver value within 1-2 years through raw material benefits. Recovery rates of 80-
Efficient process design, energy optimisation, and automated chemical dosing cut power and reagent bills by 20-40% compared to conventional plants.
Consistently meets discharge consent limits, avoiding fines, prosecutions, and reputational damage. Monthly compliance reports satisfy regulators.
High-quality effluent suitable for non-potable applications — cooling tower make-up, washdown, and irrigation — reducing freshwater consumption.
Duty/standby equipment, automated controls, and predictive maintenance minimise downtime. 95-98% availability targets with rapid response support.
Modular design with spare connection points and over-sized aeration capacity allows 30-50% flow increase with minimal additional Capital expenditure.
Energy-efficient design, biogas recovery, and water reuse support BREEAM, LEED, and corporate ESG targets. Demonstrable carbon footprint reduction.
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.