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Forward osmosis promoted in-situ formation of struvite with simultaneous water recovery from digested swine wastewater.
- Source :
-
Chemical Engineering Journal . Jun2018, Vol. 342, p274-280. 7p. - Publication Year :
- 2018
-
Abstract
- Livestock wastewater contains a large amount of nutrients that are available for recovery. In this study, a proof of concept process based on forward osmosis (FO) was proposed and investigated for in situ formation of struvite from digested swine wastewater. This FO system took advantage of a drawback – reverse solute flux (RSF) and used the reverse-fluxed Mg 2+ for struvite precipitation, thereby accomplishing recovery of both water and nutrient. With 0.5 M MgCl 2 as a draw solution, high-purity struvite formed spontaneously in the feed solution and the water flux through the FO membrane reached 3.12 LMH. The precipitated struvite was characterized and exhibited a similar composition to that of commercial struvite. The FO system achieve >50% water recovery and >93% ammonium nitrogen removal from the digested swine wastewater; in particular, it obtained >99% phosphate recovery, much higher than 60.7% removal via direct MgCl 2 addition (without FO treatment). The recovered products (both struvite and water) could potentially generate a value of 1.35 $ m −3 . The results of this study have demonstrated the feasibility of nutrient recovery from livestock wastewater promoted by FO treatment. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SWINE
*OSMOSIS
*DENITRIFICATION of petroleum
*FLUX (Energy)
*WATER reuse
Subjects
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 342
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 131006470
- Full Text :
- https://doi.org/10.1016/j.cej.2018.02.082