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Dissolution of particulate phosphorus in pig slurry through biological acidification: A critical step for maximum phosphorus recovery as struvite

Abstract : Recycling phosphorus as struvite from pig slurry requires an acidification step to dissolve the inorganic solids containing most of the phosphorus. This study focused on the biological acidification of several pig slurries using sucrose as a model organic co-substrate. Lactic acid fermentation occurred systematically, dissolving 60'90% of TP (total phosphorus) and T-Mg (total magnesium) at pH 6 or lower. Optimal pH range for maximum P dissolution aimed at struvite recovery was 5.5'6. A simple model was developed correlating pH, sucrose and buffer capacity to optimize P dissolution and future recovery using real organic waste. © 2017 Elsevier Ltd
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https://hal.inrae.fr/hal-02606510
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 12:39:05 PM
Last modification on : Friday, November 27, 2020 - 3:54:03 PM

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Simon Piveteau, S. Picard, P. Dabert, M.L. Daumer. Dissolution of particulate phosphorus in pig slurry through biological acidification: A critical step for maximum phosphorus recovery as struvite. Water Research, IWA Publishing, 2017, 124, pp.693-701. ⟨10.1016/j.watres.2017.08.017⟩. ⟨hal-02606510⟩

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