Pulp & Paper Industry Wastewater Treatment
The pulp and paper industry is water intensive. Once pulp is taken in water and a sheet of paper is made, all that water still needs to be dealt with. Equipment cleaning and steam also contribute to wastewater load.
While much of this water can be recycled, some of it is wasted and ends up as sludge - pulp and paper mills can produce up to one cubic metre of sludge for each ton of paper produced.
80% of total suspended solids (TSS) in the water treatment process is transferred to wastewater treatment sludge during the primary treatment process, and as sludge treatment, handling, and disposal costs money these wasted solids represent a cost to the business.
Our pulp and paper processing water treatment systems can improve your profitability by helping you capture and remove suspended solids before they reach downstream treatment systems, cutting the costs of sludge processing and handling, providing options for recycling and reuse of both water and pulp, and improving downstream treatment capacity and efficiency.
Your water could help save you money. Talk to our experts to find out how.
Our experts recommend: remove suspended solids to protect and enhance downstream processes
Most plants use Dissolved Air Flotation (DAF) for wastewater treatment, and many plants are moving to much more capital-intensive treatments such as activated sludge to further reduce TSS and Biological Oxygen Demand (BOD).
Improved upstream solid-liquid separation is an ideal way to protect your DAF process from the impacts of excessive solids loading and preserve DAF processing capacity, preventing operational and energy cost increases and potentially providing the opportunity to re-rate a DAF system for higher capacity.
Our experts recommend: capture and reuse both water and solid by-products
Fine and ultrafine screening can capture pulp and paper waste scraps from flow streams, allowing water to be reused for activities such as steam production or plant washwater.
The right screening system can output clean, dry product (with some delivering 2-4% total solids directly, and up to 50% total solids) that can often be re-pulped while preventing these materials from entering sludge processes.
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