Concentration of biogas slurry with forward osmosis technology

Bio-gas slurry is the residue after the anaerobic fermentation of excrements from breeding industries. Bio-gas slurry is already known to be a valuable resource as a liquid fertilizer that increases crop yields and improves soil quality. Forward osmosis (FO) is an isolation technology based on the n...

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Veröffentlicht in:Nong ye gong cheng xue bao 2014-01, Vol.30 (24), p.240-245
Hauptverfasser: Li, Hongna, Shi, Zhiwei, Zhu, Changxiong
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Sprache:chi
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Zusammenfassung:Bio-gas slurry is the residue after the anaerobic fermentation of excrements from breeding industries. Bio-gas slurry is already known to be a valuable resource as a liquid fertilizer that increases crop yields and improves soil quality. Forward osmosis (FO) is an isolation technology based on the natural phenomenon of osmosis with the transportation of water across a semi-permeable membrane. This paper reported on the application of the FO technology to the concentration of the bio-gas slurry, so as to improve its practical value, at a seashore pig farm in Shandong Province, using seawater as the draw solution. Considering that the driving force of FO membrane technology is the concentration difference, variations in the FO membrane flux were determined at different draw solution fluxes, so as to investigate the effect of draw solution flux on the membrane flux. In summary, it is feasible and effective to concentrate bio-gas slurry with FO technology, which not only alleviates the wastage of nutrients in the
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2014.24.029