Phosphorus Recovery From Wastewater Through Anaerobic Digestion Under Sub‐Supersaturation Conditions Article Swipe
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· 2025
· Open Access
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· DOI: https://doi.org/10.1002/wer.70161
· OA: W4413148332
Unlike conventional phosphorus (P) recovery methods that rely on high P concentrations and/or chemical additives, this study presents a cost‐effective approach for inducing the precipitation of phosphate salts by utilizing carefully selected feedstocks and optimal operating conditions. To test the feasibility of this approach, three 1.0‐L upflow anaerobic sludge blanket (UASB) reactors were operated, fed with three types of synthetic feeds, consisting of glucose + sodium acetate (NaAc), glucose + bovine serum albumin (BSA), and glucose + urea as the organic matter sources. All the organic compounds, including NaAc, BSA, and urea, which underwent hydrolysis to release hydroxyl ions, successfully created a favorable environment for the precipitation of P products like struvite and calcium phosphate under sub‐supersaturation conditions. This study offers new perspectives on recovering P from waste streams with relatively low P concentrations.
