文章基本信息

标题：OPTIMIZATION OF SLUDGE DEWATERING PERFORMANCE THROUGH RESPONSE SURFACE METHODOLOGY COMBINED WITH ULTRASONIC AND CALCIUM OXIDE
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作者：Wen-Jun Liang ; Xiu-JuanShi ; Yi-LiLi 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：7
页码：4495-4503
语种：English
出版社：PSP Publishing
摘要：The high moisture content of sludge is harmful to the environment during the process of disposal such as water pollution or the large area. Therefore, sludge pretreatment is very important before the mechanical dewatering. In this paper, sludge specific resistance (SRF) and moisture content of the cake were regarded as the evaluation parameters of sludge dewatering. Optimum range of the effect factors was obtained through single factor experiment. The effect of ultrasonic and Calcium oxide on sludge dewatering performance was investigated. Multiple quadratic regression equation models of SRF and moisture content of sludge cake were established by Box-Behnken experimental design. The optimum parameters of co-conditioning demonstrated that ultrasonic combined with Calcium oxide could significantly improve sludge dewatering performance. The optimum conditions for ultrasonic time, ultrasonic density and Calcium oxide dosage were 2.53 min, 0.33 W/mL and 0.97 g/100mL, respectively. Calibration experiment was conducted under the optimal conditions, SRF being of (2.33士0.37)xl〇12m/kg and moisture content of the cake being of (65.07士 0.57)% could be achieved, which coincided with model predictions.
关键词：Calcium oxide;Parameters optimization;Response surface methodology;Sludge dewatering;Ultrasonic