The Pearl® SystemSee All Digestor Components
Ostara’s Pearl® system offered by Evoqua Water Technologies is a fluidized bed reactor that harvests nutrients from wastewater and transforms them into an eco-friendly fertilizer. This cost-effective nutrient recovery solution converts wastewater treatment plants into true resource recovery facilities.
The Pearl system is a fully customizable and modular treatment solution designed to recover phosphorus from pre-and post-digestion liquors, as well as industrial streams, through the controlled precipitation of crystalline struvite. Within the Pearl system reactor, the growth of struvite (magnesium ammonium phosphate) is facilitated by the addition of magnesium in a controlled pH setting. This allows nutrients to crystallize into highly pure fertilizer granules, which are harvested, dried and bagged – then distributed and sold by Ostara as Crystal Green® Fertilizer. Treated effluent is then discharged from the top of the reactor and returned to the plant with significantly reduced nutrient content.
Complementing the Pearl system is the WASSTRIP® system, providing critical benefits to facilities that use anaerobic digestion. Releasing phosphorus and magnesium upstream before reaching the digester. The WASSTRIP system turbo-charges nutrient removal and recovery. Plus, the system protects digesters and equipment from struvite scale formation, improves dewaterability, and reduces biosolids volumes.
Pearl, Crystal Green and WASSTRIP are trademarks of Ostara Nutrient Recovery Technologies Inc. used under license.
Optimize Plant Operations and Achieve Cost Savings
- Reduce phosphorus recycle
- Reduce struvite maintenance costs
- Mitigate digester struvite buildup
- Improve dewaterability
- Reduce polymer demand
- Reduce sludge production
- Commercial fertilizer production
- Guaranteed fertilizer buyer and revenue
- Reduced chemical purchase costs
- Reduced sludge disposal costs
- Full cycle resource recovery
- Reduce carbon footprint
- Reduce chemical demand