Pulp & Paper

Recovery and reuse of pulp & paper wastewaters and chemicals

Saltworks’ wastewater treatment team helps with wastewater challenges such as biochemical oxygen demand, total suspended solids, residual bleaching agents, sodium sulfate recovery, and more.
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Pulp & Paper Wastewater

Water is an essential ingredient to the pulp and paper industries. Wastewater from pulp and paper processes may face regulatory scrutiny due to risks to aquatic life.


Wastewater concerns may include:

  • residual bleaching agents, such as hydrogen peroxide
  • reducing consumption by increasing water reuse
  • total suspended solids (TSS) and turbidity
  • biochemical oxygen demand (BOD/COD)
  • organics (especially organochlorides)
  • ammonia/nitrogen
  • sodium sulfate.
Pulp and paper mill manufacturing
Photo of XtremeRO pilot onsite in SEA

Expertly Optimized RO 

Reverse osmosis (RO) concentrates waste streams for disposal and recovers fresh water for processing. We can help you get the most out of RO with a suite of products that maximize performance, cost-effectiveness, and longevity:

  • BrineRefine scaling ion removal with precision automated chemical dosing
  • Highly robust XtremeUF ceramic ultrafiltration for organics and particulate removal
  • XtremeRO brine concentration systems available in three pressure classes to meet your recovery needs
  • Dynamic recovery control with our ScaleSense sensors to optimize recovery in real time as water conditions change
  • Our SaltMaker evaporator crystallizer range further concentrates brine to minimal or zero liquid discharge (MLD or ZLD)
  • SaltMaker ChilledCrys withdraws dissolved sodium sulfate as a solid, suitable for reuse. 

Saltworks Can Help

Saltworks’ experts can help you to understand your options, including treatment, discharge regulations, and economics.


To decide on an appropriate and cost-effective treatment process, it is critical to know the wastewater chemistry in detail and understand the treatment goals and capacity needs.


Saltworks can review water chemistry and specific project requirements so that a treatment process is chosen that balances simplicity, cost-effectiveness, and reliability. Contact us for project reviews, water testing, pilots, and more.

Pulp and Paper Industrial Wastewater

Pulp & Paper Related Products

BrineRefine Chemical Softening System

Smart, compact, modular chemical system that reduces costs with precise dosing and built-in solids management. Improves recovery & minimizes fouling risk with intelligent controls that communicate with downstream assets, like RO or evaporators. More ...

SaltMaker MultiEffect Evaporator Crystallizer

Modern, modular, and intelligently automated evaporator-crystallizer that concentrates brine or produces low volume solids for zero liquid discharge. More ...

XtremeRO Brine Concentrator

Next-generation water-maker and brine-concentrator based on reverse osmosis that achieves extreme freshwater recoveries, enabling cost-effective brine management and treatment of challenging organic-laden waters including oil & gas produced waters. More ...

XtremeUF Ceramic Ultrafiltration System

An ultra-robust ceramic based ultrafilter that can remove suspended solids, oils, and grease from the most challenging slurries & impacted wastewaters. XtremeUF cleans as it operates, to ensure your membranes maintain performance. More ...

Pulp & Paper Related Resources

Sulfates Selective Removal

Sulfate Discharge: Measurement and Cost-Optimized Removal

There are many sulfate treatments available, with different advantages and disadvantages. Factors for consideration include capital and operational costs, solid vs. liquid brine reject for disposal, if the need is seasonal or year-round, and suitability for adverse operating conditions.

More ...

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