One industry’s waste is transformed into value for another industry

Ostara Nutrient Recovery Technologies is a clean water firm that extracts phosphorous, nitrogen, and other nutrients from wastewater and then recycles it into fertilizer.

The firm just completed a $14.5 million VC round led by VantagePoint Capital Partners, along with Frog Capital and a team of new investors including Waste Resources Fund L.P. VantagePoint venture partner Robert Kennedy, Jr. is on Ostara's board of directors.

Ostara's equipment can extract more than 90 percent of the phosphorus and 40 percent of the ammonia load from a sewage sludge stream of 500,000 liters per day, according to the firm. The resulting mixture is used to make roughly 500 kilograms of what the company calls Crystal Green, a slow-release fertilizer.

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