Ostara Nutrient Recovery Technologies, Inc. is a Vancouver-based company that developed the proprietary wastewater treatment technology, called the Pearl® Nutrient Recovery Process. This recovers phosphorus and other nutrients from sludge liquids preventing the buildup of struvite scale in plant infrastructure and converting the recovered nutrients into the premium commercial fertilizer Crystal Green®. Crystal Green® is commercially available through Nutrients PLUS for the exclusive use in blends with organic matter for lawn & garden centers under the brand name Clarus® and professional under the brand name Clarus Pro®.

Once integrated into the wastewater treatment system, the Ostara reactor initiates a chemical reaction that processes the sludge liquids and recovers phosphorus and other nutrients, dramatically reducing the phosphorus and ammonia load returned to the liquid treatment train by 90% and 20% respectively. The recovered nutrient stream is mixed with appropriate doses of magnesium chloride and caustic to precipitate struvite pellets. The pellets are then harvested from the reactor and formulated to become Crystal Green®, a high-quality environmentally friendly, slow-release, commercial fertilizer that provides revenue for the system’s operator.