Biological and Chemical Phosphorus Elimination

Phosphorus removal using ferric–calcium complex as precipitant: Parameters optimization and phosphorus-recycling potential

“…Phosphorus removal using ferric salt is an efficient method, but it has some drawbacks such as high treatment cost, low effluent pH and difficult recycling of phosphorus from precipitates [14,15]. In contrast, phosphorus removal using calcium salt is a cost-effective option for phosphorus recycling from precipitates, but it leads to an unacceptably high effluent pH of over 10 [16,17]. Based on the properties of two precipitants, the phosphorus removal using ferric-calcium complex was hypothesized to be a good technology.…”