Desalination of Glutamate Fermentation Wastewater by Electrodialysis
YANG Wen-long WANG Qian YANG Peng-bo CONG Wei
State Key Lab. Biochem. Eng., Institute of Process Engineering, Chinese Academy of Sciences State Key Lab. Biochem. Eng., Institute of Process Engineering, Chinese Academy of Science State Key Lab of Biochemical Engineering，Institute of Process Engineering，Chinese Academy of Sciences State Key Lab. Biochem. Eng., Inst. Process Eng., CAS
Abstract：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 of wastewater 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.
2013, Vol. 13 
