Pulp and Paper
Water treatment, wastewater and reuse for the pulp and paper industry.
Technologies for fiber separation, organic load treatment and sludge management. Solutions adapted to pulp production, papermaking and recovered paper processing.
Water and wastewater treatment in the pulp and paper industry
Water carries fibers, takes part in stock preparation and is used for washing and utilities in pulp and paper mills. The water profile varies between integrated mills, paper mills and recycled-fiber operations.
Wastewater may contain fibers, fines, mineral fillers, organic matter and additives. In pulp production, compounds derived from wood and processing stages can add color and hard-to-biodegrade fractions.
A pulp and paper WWTP must consider the raw material, the type of paper, bleaching stages where present and the level of circuit recirculation.
Pulp and Paper.
Main challenges in this segment
Solutions to optimize industrial processes, reduce water consumption and increase efficiency in wastewater treatment.
Fibers, fines and mineral fillers
A high solids content calls for proper separation to avoid losses and overloading of subsequent stages.
Color and dissolved organic matter
Wastewater composition may require treatment beyond fiber removal, especially in pulp operations.
Build-up in water circuits
Increased recirculation can concentrate salts and dissolved contaminants, limiting circuit closure.
Sludge with variable composition
Fibers, mineral fillers and biomass affect sludge thickening, dewatering and disposal.
Different processes call for different treatment lines
Manufacturing with virgin pulp, the use of recovered paper and integrated production generate different streams. Flow, fiber content, mineral solids, dissolved load and additives should guide the treatment strategy.
Screening, equalization and solid-liquid separation may come before the biological stage. Flotation or settling is selected according to how the solids behave and the conditioning required.
Biological treatment handles the biodegradable portion; color and persistent compounds may require additional stages. The sludge line should consider conditioning and dewatering tests, especially for mixtures of fibers and minerals.
Integrated water, wastewater and reuse
Intake water treatment and the recovery of internal streams should consider the quality required at different points in the mill.
Water reuse in the pulp and paper industry can be studied based on the circuits and the contaminant balance. Filtration and ultrafiltration help control particles but do not replace the assessment of salts and dissolved compounds that build up in recirculation.
Technologies for pulp and paper
Linsul offers technologies to treat industrial water, separate solids and handle the biological and sludge stages. The selection takes into account the manufacturing process and the conditions of the water circuits.
Wastewater Treatment Plant (WWTP)
Water Treatment Plant (WTP)
Rotary Screen
Dissolved Air Flotator
Lamella Clarifier
MBBR System
Diffused Air Aeration System
Sludge Thickener
Sludge Thickening Table
Sludge Dewatering Press
Pressure Filter
Ultrafiltration System
More efficiency for
your operation.
Integrated treatment of the water circuits and the WWTP helps manage solids, dissolved loads and production residues.
Explore our other segments:
The experience gained across different industries allows us to understand the specific challenges of each segment and develop solutions adapted to the needs of each operation.
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Technologies for treating effluents with high organic load, contributing to safer and more sustainable operations.
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Solutions for treating effluents rich in sugars and organic matter, ensuring compliance and production efficiency.
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Treatment of oily and metal-bearing effluents from machining and parts finishing processes.
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Systems to treat effluents containing surfactants and oils, typical of cosmetics and personal care production.
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Robust solutions for complex effluents with hydrocarbons and high chemical oxygen demand.
Chemical industry
Specialized treatment for effluents of variable composition, ensuring operational and environmental safety.
Tannery
Systems for effluents with high organic load and chromium, reducing the environmental impact of the tanning process.
Agribusiness
Solutions for effluent from the processing of grains, fruit, milk and other farm products, with high organic load and suspended solids.
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