title: A ten liter stacked microbial desalination cell packed with mixed ion-exchange resins for secondary effluent desalination.
abstract: The architecture and performance of microbial desalination cell (MDC) have been significantly improved in the past few years. However, the application of MDC is still limited in a scope of small-scale (milliliter) reactors and high-salinity-water desalination. In this study, a large-scale (>10 L) stacked MDC packed with mixed ion-exchange resins was fabricated and operated in the batch mode with a salt concentration of 0.5 g/L NaCl, a typical level of domestic wastewater. With circulation flow rate of 80 mL/min, the stacked resin-packed MDC (SR-MDC) achieved a desalination efficiency of 95.8% and a final effluent concentration of 0.02 g/L in 12 h, which is comparable with the effluent quality of reverse osmosis in terms of salinity. Moreover, the SR-MDC kept a stable desalination performance (>93%) when concentrate volume decreased from 2.4 to 0.1 L (diluate/concentrate volume ratio increased from 1:1 to 1:0.04), where only 0.875 L of nonfresh water was consumed to desalinate 1 L of saline water. In addition, the SR-MDC achieved a considerable desalination rate (95.4 mg/h), suggesting a promising application for secondary effluent desalination through deriving biochemical electricity from wastewater.
authors: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University , Beijing, 100084, P.R. China.
authors: Kuichang
authors: K
authors: Zuo
authors: Jiaxiang
authors: J
authors: Cai
authors: Shuai
authors: S
authors: Liang
authors: Shijia
authors: S
authors: Wu
authors: Changyong
authors: C
authors: Zhang
authors: Peng
authors: P
authors: Liang
authors: Xia
authors: X
authors: Huang
mesh_terms: D001674:Bioelectric Energy Sources; D004560:Electricity; D007475:Ion Exchange Resins / Q000737:chemistry*; D012212:Rheology; D054712:Salinity; D012965:Sodium Chloride / Q000302:isolation & purification*; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D007475:Ion Exchange Resins; D012965:Sodium Chloride; D062065:Wastewater