| 城市污泥微波干化及污染物析出特性研究 |
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| 引用本文： | 刘念汝,王光华,李文兵,陈彪,吕立君,卢露露,刘贝.城市污泥微波干化及污染物析出特性研究[J].工业安全与环保,2016(7):80-83. |
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| 作者姓名： | 刘念汝 王光华 李文兵 陈彪 吕立君 卢露露 刘贝 |
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| 作者单位： | 武汉科技大学化学工程与技术学院 武汉430081 |
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| 摘 要： | 采用直接热干化和微波两种方法对3种城市污泥进行了研究,分别考察了温度、污泥厚度、微波功率对干化过程的影响,并研究了干化气体的二次污染问题。研究表明,直接热干化耗时长,温度和污泥厚度是影响干化过程的主要因素;微波干化耗时短,效率高;厚度为4 mm的污泥在微波功率为1 200 W时,仅需3min含水率降至10%以下。微波干化气体的冷凝液COD,NH_4~+-N指标明显低于直接热干化。
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| 关 键 词： | 污泥 微波干化 污染物 |
Study on Microwave Drying and Pollution Emission Characteristics of Municipal Sewage Sludge |
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| Abstract: | The direct thermal drying (DTD ) and microwave drying (MWD ) are adopted to study 3 kinds of municipal sewage sludges ,the effects of temperature ,thickness of sludge cake ,microwave power on drying process are researched and the col-lateral pollution during drying process is also studied .The results show that DTD takes long time and temperature and thick-ness of sludge cake are the main factors for DTD ,MWD takes shorter time with high efficiency and as for sludge with thick-ness of 4 mm ,it only takes 3 minutes to reach a water content under 10% when the microwave power is 1200 W .The values of COD and NH4+ -N by MWD are obviously lower than that of DTD . |
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| Keywords: | sewage sludge microwave drying pollutant |
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