Abstract:With the characteristics of highly clay content and weakly alkaline, dredged sludge was mixed with the sludge from domestic wastewater treatment plant to domesticate for sulfur bacteria liquid. The effects of bioleaching test on the cadmium removal rates, dewatering and sediment properties were demonstrated. The results revealed that Cd could be effectively removed by cooperation of substrate sulfur powder and FeSO4?7H2O, and the sludge properties of dewatering and sediment were significantly improved. The removal rate of Cd was 88.68 % when the concentration of sulfur powder and FeSO4?7H2O were 5 g/L and 15 g/L and the inoculation was 20%. The centrifugal dewatering rate and moisture content of the sludge cake were 75% and 33.47%, respectively. Under the same condition, sludge had the maximum sediment distance.
张铮, 吴燕, 刘禹杨, 刘银. 生物淋滤法对疏浚淤泥中镉去除率及性质的影响[J]. 中国环境科学, 2013, 33(4): 685-690.
ZHANG Zheng, WU Yan, LIU Yu-Yang, LIU Yin. Effects of bioleaching on removal rate of cadmium and dewatering property from dredged sludge. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(4): 685-690.