Centrisys CNP

BioSolids Process

Pondus

Thermal Hydrolysis Process

As a Cost-Effective Choice, PONDUS™ Requires Little Day-To-Day Plant Supervision.  PONDUS, a thermal/alkaline hydrolysis process, is designed for solids from 4% to 12% and uses a combination of caustic soda (NaOH) and low grade heated water (140 °F to 160 °F) to break down the cell walls.

PONDUS Simple and Effective without a Pressure VesselPondus Centrisys CNP

  • Reduce Viscosity of Thickened WAS up to 80%
  • Reduce Anaerobic Digestion Volume up to 50%
  • Reduce Biosolids Disposal Costs up to 30%
  • Increase Biogas Production up to 35%
  • Reduce Polymer Consumption at Dewatering up to 20%
  • Reduce Digester Foaming

Unlock the full potential of phosphorus recovery with CalPrex & MagPrex.

This powerful duo captures over 50% of total phosphorus entering your treatment plant while minimizing chemical usage. By integrating these innovative solutions, you not only enhance operational efficiency but also contribute to environmental sustainability by reducing nutrient pollution. Discover how this combination can optimize your facility’s performance and create valuable resources from waste.

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Mag Prex

Biological Phosphorus Removal for Wastewater

The Affordable Option Giving All Plant Sizes the Ability to Control Struvite and Recover Phosphorus.MagPrex Centrisys CMP Product Before and After

MagPrex turns struvite into an opportunity for resource recovery. In wastewater reclamation plants with Biological Phosphorus Removal (BPR), phosphorus accumulates in sludge and releases soluble phosphorus (PO4-P) in an anaerobic condition. Elevated soluble phosphorus levels in sludge causes operational challenges.

Form struvite by stripping out CO2, elevates the pH and adds MgCl2 to augment Mg2+.

Install between the anaerobic digester and the dewatering equipment.

Convert the orthophosphate into struvite crystals with two recovery options:

  • Harvesting: struvite crystals are removed from the digested sludge and used as a beneficial fertilizer
  • Sequestration: leave the struvite crystals in the sludge

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Cal Prex

High-Efficiency P-Recovery and Digester Protection

Fermentation: the Biological Solution for Phosphorus Solubilization

CalPrex works with high concentrations of soluble phosphorus and is a viable solution for utilities seeking to mitigate operations and maintenance issues related to struvite scaling and poor sludge dewaterability.  The end recovered product, brushite, is a fertilizer comparable to leading phosphate fertilizers on the market today.

This high-value solution is for facilities needing phosphorus removal and recovery:

  • Prior to thermal hydrolysis
  • From waste activated sludge and/or primary sludge prior to anaerobic digestion
  • From aerobic or post-aerobic digestion (PAD)

CalPrex reactor sits between the fermentation tank and gas phase digesters.

Fermentation for 12-36 hours prior to the anaerobic digester provides a low oxygen environment.

  • Facilitates the rapid release of soluble phosphorus in Bio-P sludge along with the dissolution of crystalized and organically-bound phosphorus
  • Over 60% solubilization of P can occur in the fermentation without using any additional chemicals
  • In non-Bio-P plants, up to 40% of the phosphorus solubilizes using a fermentation step
Fermented sludge is dewatered.

Centrate is sent to the CalPrex reactor.

  • Centrate precipitates the dissolved phosphorus with the addition of calcium hydroxide
  • Maintains the solution around 6.5 pH
  • Recovers phosphorus as a brushite crystal (CaHPO4•2H2O)

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