期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 93, 期 9, 页码 2758-2765出版社
WILEY
DOI: 10.1002/jctb.5651
关键词
manure; organic matter; particle size; phosphorus recovery; suspended solids
类别
资金
- European Community's Framework Programme, within the Manure EcoMine project [603744]
- University of Girona [MPCUdG2016/137]
- Fondazione Cariplo (project 'Power') [2014-1276]
- Catalan Government [2014FI_B 00264]
- consolidated research group by the Catalan Government [2017-SGR-1552]
- Management Committee of the COST [ES1202]
- Catalan Government
BACKGROUNDPhosphorus (P) resources are limited, and to assure its supply, efforts must be focused on P-recovery rather than its removal. In this sense, manure is a mining opportunity for nutrient recovery, for example, when recovered as struvite. However, manure treatment is challenging due to its characteristics, such as the solids content, one of the main hindrances to struvite formation. Many researchers have setablished a limit value of 1g of total suspended solids (TSS)L-1 to avoid interferences with struvite precipitation. Despite this, few studies have focused on the effect of solids on struvite formation. RESULTSThis study identified the role of solids in struvite nucleation and growth, and its interaction. The viability of struvite recovery from digested manure is ensured, even at high concentrations of solids (from 1 to 3gTSSL(-1)), recovering more than 95% of the phosphorus as struvite. The results showed that solids not only did not interfere on struvite formation, but also played an important role during struvite crystallization, acting as nuclei favoring heterogeneous nucleation. CONCLUSIONSSuspended particles favored the aggregation and/or agglomeration of struvite crystals, forming crystal nets and recovering bigger crystalline structures. The presence of solids on the recovered product might be beneficial for meeting crop demands and maintaining or restoring soil fertility, while applying an excellent slow-release fertilizer. (c) 2018 Society of Chemical Industry
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