Abstract:The performance of electro-osmotic method for dewatering municipal sludge was investig. The effect of sludge conductivity on dewatering efficiency and energy consumption was evaluated via adding Na2SO4 and washing by deionized water to adjust the conductivity. The results showed that with increase in Na2SO4 dosage, the sludge moisture decreased from 51.2% to 45.7% after 20min of electro-dewatering. However, the energy consumption increased by 23.3%~69.2% with increasing conductivity. Decreasing the sludge conductivity by deionized water washing resulted in a slight increase in the final moisture of sludge from 52.3% to 53.1% after 20 min of electro-dewatering. However, the energy consumption decreased considerably by 15%~24%. The results indicate that electro-dewatering is a suitable dewatering method for sludges of low conductivity.
董立文, 汪诚文, 张鹤清, 王玉珏. 电导率对城镇污泥电渗透脱水效果的影响[J]. 中国环境科学, 2013, 33(2): 209-214.
DONG Li-Wen, WANG Cheng-Wen, ZHANG He-Qing, WANG Yu-Jue. Effect of conductivity on the performance of electro-dewatering of municipal sludge. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(2): 209-214.