Reactor system transforms nutrient excess to eco-friendly fertilizer

摘要

The City of Saskatoon, Saskatchewan, Canada, has turned a problem of excess phosphorus accumulating in its wastewater treatment system into a slow-release, environmentally friendly fertilizer. The Ostara Pearl~® 2000 reactor system operating at the City of Saskatoon Wastewater Treatment Plant transforms excess phosphorus and nitrogen from the wastewater into fertilizer pellets. In the final steps of the process, a Kason single deck circular vibratory screener dewaters the pellets, and a five-deck Kason classifier separates the final dried pellets into four commercial sizes sold as Crystal Green~® fertilizer.