Abstract

This article discusses the decline in phosphorus resources due to its over‐production as a fertilizer. and as a result of phosphorus‐mining, the threat it poses as it enters the ecosystem as waste, thus leading to excessive nutrient levels in waterways. Pearl®, a nutrient recovery process technology developed by Ostara, a Vancouver, B.C., company, is presented as being effective at removing up to 20% of the phosphorus load to wastewater treatment plants. The Pearl process is based on a proprietary fluidized bed reactor in which magnesium is added to sludge dewatering liquor to precipitate struvite under a controlled chemical reaction.

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