CaO和木屑对市政污泥干化过程中黏滞特性的影响

doi:10.16085/j.issn.1000-6613.2017.05.048

化工进展 ›› 2017, Vol. 36 ›› Issue (05): 1933-1939.DOI: 10.16085/j.issn.1000-6613.2017.05.048

CaO和木屑对市政污泥干化过程中黏滞特性的影响

邓文义, 梅静, 刘亚军, 袁旻昊, 苏亚欣

东华大学环境科学与工程学院, 上海 201620

收稿日期:2016-09-19 修回日期:2016-12-18 出版日期:2017-05-05 发布日期:2017-05-05
通讯作者: 邓文义(1982-),男,博士,副教授。
作者简介:邓文义(1982-),男,博士,副教授。E-mail:dengwy@dhu.edu.cn。
基金资助:
国家自然科学基金项目（51408111）

Effect of CaO and sawdust on sticky properties of municipal sewage sludge during drying process

DENG Wenyi, MEI Jing, LIU Yajun, YUAN Minhao, SU Yaxin

College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

Received:2016-09-19 Revised:2016-12-18 Online:2017-05-05 Published:2017-05-05

摘要/Abstract

摘要： 采用Jenike法和搅拌法研究了污泥的黏滞特性，分析了CaO和木屑两种添加剂对污泥黏滞特性的影响。研究结果表明，CaO能够提高污泥的黏附和结团应力。在Jenike法中，当污泥中加入占湿基污泥（WB）质量分数为5%的CaO后，最大黏附应力和结团应力分别上升了58%和28%；木屑能够显著提高污泥的结团应力，但对黏附应力的影响则不显著。在搅拌法测试中，当污泥中加入CaO后，污泥黏滞区向高含水率区间移动。在所研究的CaO质量分数为0~8%（占WB的质量分数，下同），CaO质量分数越高，黏滞区含水率越大；当污泥中加入5%木屑后，污泥黏滞区间明显增大，且搅拌扭矩也有显著上升，当木屑含量增加至10%后，污泥黏滞区向高含水率区间移动，且扭矩下降。

关键词: 氧化钙, 木屑, 污泥, 黏滞, 黏附, 结团

Abstract: The sticky properties of sewage sludge were tested using Jenike method and agitation method. The effects of CaO and sawdust on sticky properties were analysed. The results indicated that CaO can promote the adhesive and cohesive stresses of sewage sludge. In Jenike method,adhesive and cohesive stress increased by 58% and 28%,respectively when 5% (wet basis,WB) of CaO was added. Sawdust could markedly increase the cohesive stress,but it had no obvious effect on the adhesive stress. In agitation tests,lumpy phase of the sludge transferred to high moisture range by CaO addition. The moisture content in lumpy phase increased with the increase of CaO content in the examined 0-8%WB range. After 5%WB of sawdust addition,the range of lumpy phase increased markedly,so did the torque of dryer shaft. However,when sawdust content increased to 10%WB,the moisture content of the lumpy phase was increased,while the torque was decreased.

Key words: calcium oxide, sawdust, sewage sludge, sticky, adhesion, cohesion

中图分类号:

X705

邓文义, 梅静, 刘亚军, 袁旻昊, 苏亚欣. CaO和木屑对市政污泥干化过程中黏滞特性的影响[J]. 化工进展, 2017, 36(05): 1933-1939.

DENG Wenyi, MEI Jing, LIU Yajun, YUAN Minhao, SU Yaxin. Effect of CaO and sawdust on sticky properties of municipal sewage sludge during drying process[J]. Chemical Industry and Engineering Progress, 2017, 36(05): 1933-1939.

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CaO和木屑对市政污泥干化过程中黏滞特性的影响

Effect of CaO and sawdust on sticky properties of municipal sewage sludge during drying process

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