操作条件对吸附分离辅助电渗透脱水特性的影响Influence of Operation Conditions on Electroosmotic Dewatering Performance Assisted by Absorptive Separation
郑磊;于晓艳;张书廷;吕学斌;马德刚;
摘要(Abstract):
[目的]考察不同操作条件对吸附分离辅助电渗透脱水特性的影响。[方法]以经重力浓缩、絮凝和离心脱水后的污泥为试材,研究初始电压梯度对电渗透脱水效果、对电渗透脱水能耗的影响以及对电渗透脱水最大电流密度的影响,探讨电渗透脱水时间的优化方法。[结果]在12~24 V/cm电压梯度作用下,脱水10 min时,污泥含水率由79.9%脱水至64.7%~52.5%,同时污泥电渗透脱水能耗随脱水时间呈指数型增长。通过优化得到,在污泥电渗透脱水电压梯度为16 V/cm,脱水8 min时,污泥含水率从79.9%降到61.8%,脱水能耗为0.076 kWh/kg.H2O。[结论]增加电压梯度有利于污泥电渗透脱水,但电压梯度越高脱水能耗及极板所承受的电流密度越大。综合考虑,电压梯度应选择16 V/cm,污泥电渗透脱水时间以8 min为最佳。
关键词(KeyWords): 渗透脱水;污泥;电压梯度;能耗
基金项目(Foundation): 天津市自然科学基金项目(09JCYBJC08200)
作者(Author): 郑磊;于晓艳;张书廷;吕学斌;马德刚;
Email:
DOI: 10.13989/j.cnki.0517-6611.2011.34.061
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