Enhancing desalination and wastewater treatment by coupling microbial desalination cells with forward osmosis.
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| Title: | Enhancing desalination and wastewater treatment by coupling microbial desalination cells with forward osmosis. |
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| Authors: | Yuan, Heyang1, Abu-Reesh, Ibrahim M.2, He, Zhen1 zhenhe@vt.edu |
| Source: | Chemical Engineering Journal. Jun2015, Vol. 270, p437-443. 7p. |
| Subjects: | Wastewater treatment, Osmosis, Saline water conversion, Chemical oxygen demand, Brackish waters |
| Abstract: | Both microbial desalination cells (MDCs) and forwards osmosis (FO) are emerging technologies for energy-efficient water/wastewater treatment. However, incomplete treatment/desalination in both technologies creates challenges for further development and also synergy between the two. In this study, an integrated system was developed by coupling MDCs with a FO cell to enhance COD (chemical oxygen demand) removal in synthetic organic solution and desalination of saline water. The organic solution was treated in the MDC anode and its effluent was sent to the FO for water recovery. The diluted draw solution from the FO was desalinated in the MDC. Compared to a standalone MDC, the MDC–FO system reduced the wastewater volume by 64% and improved the conductivity reduction in saline water by two times. The coupled system also achieved higher COD removal than a standalone FO cell. The MDC–FO system was further investigated for the effects of COD, salt concentration and hydraulic retention time (HRT). It was observed that varying COD concentration had little impact on desalination. Lowering the initial NaCl concentration enhanced the COD removal to 93.0% and the conductivity reduction to 99.4%. In addition, the COD removal rate and the conductivity decrease rate were proportionally facilitated with a shortened HRT. These results have collectively demonstrated that the MDC–FO system has improved performance, compared with the standalone process. It holds great promise to either treat brackish water, or serve as pre-desalination of high-salinity water, with simultaneous wastewater treatment. [ABSTRACT FROM AUTHOR] |
| Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 101918244 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Enhancing desalination and wastewater treatment by coupling microbial desalination cells with forward osmosis. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yuan%2C+Heyang%22">Yuan, Heyang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Abu-Reesh%2C+Ibrahim+M%2E%22">Abu-Reesh, Ibrahim M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22He%2C+Zhen%22">He, Zhen</searchLink><relatesTo>1</relatesTo><i> zhenhe@vt.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Journal%22">Chemical Engineering Journal</searchLink>. Jun2015, Vol. 270, p437-443. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Wastewater+treatment%22">Wastewater treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Osmosis%22">Osmosis</searchLink><br /><searchLink fieldCode="DE" term="%22Saline+water+conversion%22">Saline water conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+oxygen+demand%22">Chemical oxygen demand</searchLink><br /><searchLink fieldCode="DE" term="%22Brackish+waters%22">Brackish waters</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Both microbial desalination cells (MDCs) and forwards osmosis (FO) are emerging technologies for energy-efficient water/wastewater treatment. However, incomplete treatment/desalination in both technologies creates challenges for further development and also synergy between the two. In this study, an integrated system was developed by coupling MDCs with a FO cell to enhance COD (chemical oxygen demand) removal in synthetic organic solution and desalination of saline water. The organic solution was treated in the MDC anode and its effluent was sent to the FO for water recovery. The diluted draw solution from the FO was desalinated in the MDC. Compared to a standalone MDC, the MDC–FO system reduced the wastewater volume by 64% and improved the conductivity reduction in saline water by two times. The coupled system also achieved higher COD removal than a standalone FO cell. The MDC–FO system was further investigated for the effects of COD, salt concentration and hydraulic retention time (HRT). It was observed that varying COD concentration had little impact on desalination. Lowering the initial NaCl concentration enhanced the COD removal to 93.0% and the conductivity reduction to 99.4%. In addition, the COD removal rate and the conductivity decrease rate were proportionally facilitated with a shortened HRT. These results have collectively demonstrated that the MDC–FO system has improved performance, compared with the standalone process. It holds great promise to either treat brackish water, or serve as pre-desalination of high-salinity water, with simultaneous wastewater treatment. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Chemical Engineering Journal is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.cej.2015.02.059 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 437 Subjects: – SubjectFull: Wastewater treatment Type: general – SubjectFull: Osmosis Type: general – SubjectFull: Saline water conversion Type: general – SubjectFull: Chemical oxygen demand Type: general – SubjectFull: Brackish waters Type: general Titles: – TitleFull: Enhancing desalination and wastewater treatment by coupling microbial desalination cells with forward osmosis. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yuan, Heyang – PersonEntity: Name: NameFull: Abu-Reesh, Ibrahim M. – PersonEntity: Name: NameFull: He, Zhen IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 06 Text: Jun2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 13858947 Numbering: – Type: volume Value: 270 Titles: – TitleFull: Chemical Engineering Journal Type: main |
| ResultId | 1 |
