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Cho, Jaeweon
Sense Laboratory
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dc.citation.startPage 116320 -
dc.citation.title WATER RESEARCH -
dc.citation.volume 186 -
dc.contributor.author Volpin, Federico -
dc.contributor.author Woo, Yun Chul -
dc.contributor.author Kim, Hanki -
dc.contributor.author Freguia, Stefano -
dc.contributor.author Jeong, Namjo -
dc.contributor.author Choi, June-Seok -
dc.contributor.author Cho, Jaeweon -
dc.contributor.author Phuntsho, Sherub -
dc.contributor.author Shon, Ho Kyong -
dc.date.accessioned 2023-12-21T16:41:28Z -
dc.date.available 2023-12-21T16:41:28Z -
dc.date.created 2021-02-03 -
dc.date.issued 2020-11 -
dc.description.abstract Urine dilution is often performed to avoid clogging or scaling of pipes, which occurs due to urine's Ca2+ and Mg2+ precipitating at the alkaline conditions created by ureolysis. The large salinity gradient between urine and flushing water is, theoretically, a source of potential energy which is currently unexploited. As such, this work explored the use of a compact reverse electrodialysis (RED) system to convert the chem-ical potential energy of urine dilution into electric energy. Urine' composition and ureolysis state as well as solution pumping costs were all taken into account. Despite having almost double its electric conductivity, real hydrolysed urine obtained net energy recoveries E-Net of 0.053-0.039 kWh/m(3), which is similar to energy recovered from real fresh urine. The reduced performances of hydrolysed urine were linked to its higher organic fouling potential and possible volatilisation of NH3 due to its high pH. However, the higher-than-expected performance achieved by fresh urine is possibly due to the fast diffusion of uncharged urea to the freshwater side. Real urine was also tested as a novel electrolyte solution and its performance compared with a conventional K4Fe(CN)(6)/K3Fe(CN)(6) couple. While K4Fe(CN)(6)/K3Fe(CN)(6) outperformed urine in terms of power densities and energy recoveries, net chemical reactions seemed to have occurred in urine when used as an electrolyte solution, leading to TOC, ammonia and urea removal of up to 13%, 6% and 4.4%, respectively. Finally, due to the migration of K+, NH4+ and PO43-, the low concentration solution could be utilised for fertigation. Overall, this process has the potential of providing off-grid urine treatment or energy production at a household or building level. (c) 2020 Elsevier Ltd. All rights reserved. -
dc.identifier.bibliographicCitation WATER RESEARCH, v.186, pp.116320 -
dc.identifier.doi 10.1016/j.watres.2020.116320 -
dc.identifier.issn 0043-1354 -
dc.identifier.scopusid 2-s2.0-85089897508 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/49949 -
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0043135420308563?via%3Dihub -
dc.identifier.wosid 000589968500003 -
dc.language 영어 -
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD -
dc.title Energy recovery through reverse electrodialysis: Harnessing the salinity gradient from the flushing of human urine -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Engineering, Environmental; Environmental Sciences; Water Resources -
dc.relation.journalResearchArea Engineering; Environmental Sciences & Ecology; Water Resources -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Reverse electrodialysis -
dc.subject.keywordAuthor Nutrients recovery -
dc.subject.keywordAuthor Power generation -
dc.subject.keywordAuthor Oxidation -
dc.subject.keywordAuthor Human urine -
dc.subject.keywordPlus PRESSURE-RETARDED OSMOSIS -
dc.subject.keywordPlus ELECTROCHEMICAL OXIDATION -
dc.subject.keywordPlus POWER-GENERATION -
dc.subject.keywordPlus WATER -
dc.subject.keywordPlus ELECTROOXIDATION -
dc.subject.keywordPlus ELECTROLYSIS -
dc.subject.keywordPlus PERFORMANCE -
dc.subject.keywordPlus EFFICIENCY -
dc.subject.keywordPlus REDUCTION -
dc.subject.keywordPlus MEMBRANES -

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