Recover Ammonia from Low Ammonia Wastewater by a Novel Combined Membrane Capacitive Deionization (MCDI) and Ion Exchange (Ⅸ) Process
In this study, a novel method of ion-exchange resin ammonia recovery with pretreatment by membrane capacitive deionization (MCDI+Ⅸ process) was proposed.As pretreatment, MCDI was selected for its selective ion removal which could eliminate prior cations” (Ca2+, Mg2+and so on) negative effects on Ⅸ absorb-desorb process.Lab-scale experiments were carried out.With the selective removal of prior cations in MCDI cell, ammonia concentration reduced slightly from 1.40mmol/L to 0.88mol/L while prior cations reduced from 8.06mmol/L to 2.36mmol/L (Converted into monovalent ions for calculation).Comparing to single Ⅸ process, MCDI+Ⅸ process could make use of additional 1.4× 10-3 kWh energy to produce additional 80% NH4and 189% water in a resin regeneration cycle.
membrane capacitive deionization ion exchange recovery of nitrogen ammonia
Wang Zhijie Gong Hui Li Chuanzhu Li Zheng Wang Kaijun
School of Environment, Tsinghua University, Beijing, 100084, China
国内会议
青岛
英文
232-236
2016-06-27（万方平台首次上网日期，不代表论文的发表时间）