The Pearl® SystemSee All Digestor Components
Ostara’s Pearl® system from 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 helping create a circular economy.
The Pearl system is 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 eco-friendly fertilizer granules, which are harvested, dried and then distributed and sold by Ostara as Crystal Green® Fertilizer. The 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 designed to remove internal phosphorus providing critical benefits to plant operations, turbo-charging nutrient removal and recovery in a controlled environment. The process tackles struvite issues, improves dewaterability and reduces biosolids production.
Crystal Green, Pearl, and WASSTRIP are trademarks licensed by or through Ostara Nutrient Recovery Technologies Inc.
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