Pulp, Paper, & Wood Product Solutions

Water is used in every aspect of paper making, but not all of it is recycled. Wasted water can end up as sludge - and 80% of the suspended solids in that sludge are transferred to sludge during primary treatment. How can businesses reclaim and reuse more pulp instead of losing it to sludge?

Water is used in every aspect of paper making. Once pulp is taken in water and a sheet is made, all that water still needs to be dealt with. Sanitation 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. It is common for pulp and paper mills to produce up to 1.3 yd3 of sludge for each ton of paper produced. 80% of total suspended solids (TSS) in the wastewater treatment process is transferred to wastewater treatment sludge during the primary treatment process.

The Hydro MicroScreen™ Can Help!

The Hydro MicroScreen™ can remove suspended solids before it enters that sludge and help reduce sludge quantities that need to be treated by expensive downstream sludge treatment processes. The system's unparalleled capture performance allows you to reclaim valuable pulp that enters wastewater flow streams and re-pulp. 

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). Hydro MicroScreen™ is the ideal way to protect your DAF process the impacts of excessive solids loading and preserve DAF processing capacity, potentially providing the opportunity to re-rate a DAF system for higher capacity. 

Hydro International's liquid / solids separation technologies can help throughout the entire pulp and paper production process

the Hydro MicroScreen™ ultrafine rotating belt filtration system can help!

  • Primary Clarification Replacement
  • TSS / BOD / COD Reduction 
    • Depending where the Hydro MicroScreen™ is installed at your plant and your site-specific operations the following removal rates may be attainable: 30-80% TSS Removal and 20-60% BOD Removal 
  • Water Recycling / Reuse 
    • Captures reject materials from flow streams allowing water re-use for steam production or plant washwater 
  • Material Recovery 
    • Captures lost pulp & waste scraps and outputs clean dry product that can often be re-pulped while preventing these materials from entering sludge processes. 
  • Liquid Solids Separation & Dewatering in a Single System 
    • Outputs materials with 2-4% Total Solids (TS) directly off the screen and 30-50% TS when used with the integral dewatering auger 

To learn more about how the Hydro MicroScreen™ can help your business to boost efficiency and make savings check out these case studies:

THe Hydro-Sludge® Screen coarse material separator can help! 

The Hydro-Sludge® Screen removes materials such as rejects, scrap material and stringy trash, sending higher quality sludge to digestion systems preserving sludge treatment capacity. 

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