谷氨酸发酵废水电渗析脱盐

Desalination of Glutamate Fermentation Wastewater by Electrodialysis

采用普通电渗析脱除谷氨酸发酵废水中的无机盐,用活性炭对废水进行预处理,考察了预处理前后废水的电渗析性能.结果表明,活性炭用量为100和200g/L时,在60℃下处理30min,废水的脱色率分别达61%和75%.预处理前及100和200g/L活性炭预处理后乳酸迁移量依次降低,谷氨酸迁移率分别为24%,35%和39%,SO42迁移率分别为77%,80%和84%,NH4+迁移率分别为89%,86%和84%,膜堆电阻依次增加,SO42脱除率达85%时,能耗分别为4.88,3.93和3.64kWh'/kg.

Electrodialysis was used to desalinate inorganic salts from a glutamic acid fermentation wastewater, and activated carbon to pretreat the wastewater. The electrodialysis performance of wastewater before and after pretreatment was examined. The results show that when the wastewater was pretreated at 60 ℃ for 30 min at the initial activated carbon concentrations of 100 and 200 g/L respectively, the decolorization rate of wastewater was 61% and 75%. In the electrodialysis process ofwastewater pretreated without and with 100 and 200 g/L of activated carbon, the removal rate of lactic acid was sequentially reduced, glutamic acid removal rate was 24%, 35% and 39%, sulfate ions removal rate 77%, 80% and 84%, and ammonium ions removal rate 89%, 86% and 84%, the resistance of membrane stacks increased as well. When sulfate ion removal rate was 85%, energy consumption was 4.88, 3.93 and 3.64 kW.h/kg, respectively.