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Sea salt bittern-driven forward osmosis for nutrient recovery from black water: A dual waste-to-resource innovation via the osmotic membrane process

引用

Frontiers of Environmental Science & Engineering 2020年第2期14卷 197-206页

作者： Wenchao Xue May Zaw Xiaochan An Yunxia Hu allan sriratana tabucanon Department of Energy Environment and Climate ChangeSchool of EnvironmentResources and DevelopmentAsian Institute of TechnologyP.O.Box 4Klong LuangPathumthani 12120Thailand State Key Laboratory of Separation Membranes and Membrane Processes School of Materials Science and EngineeringTianjin Polytechnic UniversityTianjin 300387China Faculty of Environment and Resource Studies Mahidol UniversityNakhon Pathom 71370Thailand

A dual“waste-to-resource”innovation in nutrient enrichment and recovery from domestic black water using a sea salt bittern(SSB)-driven forward osmosis(FO)process is proposed and *** performance of SSB as a“waste-to-resource”draw solution for FO was first evaluated.A synthetic SSB-driven FO provided a water flux of25.67±3.36 L/m2 h,which was 1.5-1.7 times compared with synthetic seawater,1 M NaCl,and 1M *** compromised performance regarding reverse solute selectivity was *** compensation,the enhanced reverse diffusion of Mg+suggested superior potential in terms of recovering nutrients in the form of struvite *** nutrient enrichment was performed using both the pre-filtered influent and effluent of a domestic septic *** 80%of phosphate-P recovery was achieved from both low-and high-strength black water at a feed volume reduction up to 80%^90%.With an elevated feed pH(~9),approximately 60%-85%enriched phosphate-P was able to be recovered in the form of precipitated *** the enrichment performance of total Kjeldahl nitrogen(TKN)largely differed depending on the strength of black *** concentration factor(i.e.,3-folds)and retention(>60%)of TKN was obtained in the high-nutrient-strength black water at a feed volume reduction of 80%,in comparison with a weak TKN enrichment observed in low-strength black *** results suggested a good potential for nutrient recovery based on this dual“waste-to-resource”FO system with proper management of membrane cleaning.

关键词： Forward osmosis Sea salt bittern Black water Nutrient recovery pH

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