Nutrient Recovery Solutions
Our nutrient recovery solutions reclaim phosphorus and nitrogen from waste waters to both improve water quality and produce a sustainable fertilizer, Crystal Green Pearl®.


The Challenge with Nutrients
When nutrients aren’t managed properly and enter local water ways they can feed algae blooms that harm the environment and upset communities.
Turning Nutrient Challenges into Opportunities
We view the nutrients in wastewater as a valuable source of renewable phosphorus and nitrogen that are just waiting to be beneficially recovered. That’s why we've developed our nutrient recovery solutions to sustainably recover these nutrients for use as high-value granular fertilizers while also removing the nutrients from where we don’t want them - water discharges.

Efficiently recover
renewable phosphorus
Conserve and protect water resources
Cost-effectively solve operational challenges
Create a revenue stream
How Ostara’s Nutrient Recovery Solutions Work
PEARL®
TRANSFORMS NUTRIENTS INTO FERTILIZER
The core of Ostara’s comprehensive nutrient management solution is the Pearl system, a fluid bed reactor designed for efficient removal of phosphorus and recovery of a high-purity fertilizer product.
HOW IT WORKS:
- Nutrients crystallize into highly pure fertilizer granules, in a controlled pH environment.
- Granules are harvested, dried and shipped offsite.
- Fertilizer is marketed and distributed as Crystal Green Pearl®.


WASSTRIP
SUPPORTS FACILITIES USING ANAEROBIC DIGESTION
WASSTRIP (Waste Activated Sludge Stripping to Remove Internal Phosphorus) is a value-add option for Pearl systems, providing critical benefits to facilities operating anaerobic digestion.
HOW IT WORKS:
- Phosphorus is released and bypassed upstream before entering the digester.
- Nutrient recovery is turbocharged, increasing recovered fertilizer production by controlling struvite in the Pearl reactor and not in the digesters.
- Digesters and equipment are protected from unwanted struvite formation.
- Dewaterability is improved and biosolids volume is reduced.
23
Commercial installations worldwide

Join the Growing Nutrient Recovery Movement
When using Ostara solutions to recover a valuable resource, you partner with your community and farmers to support our collective future. The phosphorus we recover into sustainable Crystal Green Pearl fertilizer provides a guaranteed revenue stream while improving your environmental footprint.
Featured News

Evoqua Water Technologies Partners with Ostara to Expand Access to Nutrient Recovery Systems
In September 2021, Ostara and Evoqua announced a new partnership to share nutrient recovery technology through Evoqua’s marketing, sales, and project delivery resources. In this partnership with Ostara, Evoqua gains access to the most established technologies in the rapidly growing nutrient recovery market, while also enhancing many of the established Evoqua technologies that complement Ostara solutions.
Through this license agreement, Evoqua will sell and deliver nutrient management systems using Ostara’s Pearl® and WASSTRIP®wastewater treatment technologies across North America and Europe.
Explore how Ostara and Evoqua will be implementing this technology in a community near you.
Read more
