Wastewater project in Durham turning out environmentally friendly fertilizer
By Jill Rehkopf Smith
Six months after Clean Water Services began using Canadian technology to remove certain nutrients from wastewater, the partnership is selling small quantities of environmentally friendly fertilizer, with more plants scheduled to open and international interest.
In addition, the sewerage agency recently patented a process that removes phosphorus and magnesium from wastewater, which could lead to more environmental and financial benefits.
In mid-May, the sewerage agency’s Durham treatment plant joined with Ostara Nutrient Recovery Technologies in British Columbia to remove phosphorus and ammonia from wastewater and turn it into Crystal Green, a slow-release fertilizer.
Ostara backers hope the result will be cleaner sewage plants and “greener” fertilizer across the country.
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