Exploring Forward Osmosis Systems for Recovery of Nutrients and Water
| dc.contributor.author | Wu, Zhenyu | en |
| dc.contributor.committeechair | He, Zhen | en |
| dc.contributor.committeemember | Wang, Zhiwu | en |
| dc.contributor.committeemember | Dietrich, Andrea M. | en |
| dc.contributor.department | Environmental Sciences and Engineering | en |
| dc.date.accessioned | 2018-01-20T09:00:34Z | en |
| dc.date.available | 2018-01-20T09:00:34Z | en |
| dc.date.issued | 2018-01-19 | en |
| dc.description.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 reversed-fluxed Mg^{2+} for struvite precipitation, thereby accomplishing recovery of both water and nutrient. With 0.5 M MgCl2 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, >99% phosphate recovery (given sufficient magnesium supply), and >93% ammonium nitrogen removal from the digested swine wastewater. 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 facilitated by FO treatment. | en |
| dc.description.degree | Master of Science | en |
| dc.format.medium | ETD | en |
| dc.identifier.other | vt_gsexam:14295 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/81881 | en |
| dc.publisher | Virginia Tech | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | Forward osmosis | en |
| dc.subject | Swine wastewater | en |
| dc.subject | Struvite | en |
| dc.subject | Nutrient recovery | en |
| dc.subject | Water recovery | en |
| dc.title | Exploring Forward Osmosis Systems for Recovery of Nutrients and Water | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Environmental Engineering | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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