2026-04-14T04:28:53Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/34712025-10-22T11:29:42Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
Magrí, Albert
author
Company, Emma
author
Farrès, Moises
author
Ferrer, Jordi
author
González Llinàs, Elena
author
Domingo Olivé, Francesc
author
Colprim, Jesús
other
Producció Vegetal
group
Cultius Extensius Sostenibles
2025-10-22T11:29:42Z
2025-10-22T11:29:42Z
2024-11-23
Magrí, Albert, Emma Company, Moises Farrès, Jordi Ferrer, Elena González, Francesc Domingo, and Jesús Colprim. 2024. “Recovery of Potassium-Rich Struvite in a Pig Farm Downstream a Nitrogen Removal Treatment Plant: Technological, Agricultural and Economic Assessment.” Waste and Biomass Valorization, November. https://doi.org/10.1007/s12649-024-02812-w.
1877-265X
http://hdl.handle.net/20.500.12327/3471
https://doi.org/10.1007/s12649-024-02812-w
Simultaneous recovery of phosphorus (P), potassium (K), and magnesium (Mg) as precipitated phosphate salt (PPS) was assessed (K-struvite and hazenite included) in a pig farm downstream a nitrification-denitrification unit. The precipitation process was addressed using denitrified effluent (DE) and waste sludge (WS) purged from the bioreactor. For DE, the inherent unbalanced Mg:K:P molar ratio (1.4:9.5:1.0; 1.6 g K/L) led to poor K recovery (≤ 15%) if considering P as the limiting element. By considering K as limiting, the supply of external sources of Mg and P (final Mg:K:P as 1.0:0.5:1.0) allowed the recovery of most of the K available. For WS, a selective pretreatment with oxalic acid resulted in an available Mg:K:P ratio of 0.8:1.2:1.0. Risk of interference by free calcium will exist if the operational parameters are not optimized, thus constraining the recovery of K (≤ 51%). A fertilization field trial demonstrated the fertilizing value of the recovered PPS with respect to a mineral fertilizer, and the increased risk of soil salinization under a reiterative application of processed DE. Scenarios without extra addition of nutrients will introduce an enhanced handling in the current nutrient management planning of the pig farm. On the contrary, the trade of the PPS formed becomes essential when external sources of Mg and P were added.
eng
Recovery of Potassium-Rich Struvite in a Pig Farm Downstream a Nitrogen Removal Treatment Plant: Technological, Agricultural and Economic Assessment
info:eu-repo/semantics/article