木屑对印染污泥过滤脱水的调理作用及其机理研究
PDF下载 (7520)陈 斌,高华生 *,季文杰,朱剑炯,岳 远,姚 敏.木屑对印染污泥过滤脱水的调理作用及其机理研究[J].宁波大学学报(理工版),2018,31(5):109-114.DOI:
CHEN Bin,GAO Hua-sheng *,JI Wen-jie,ZHU Jian-jiong,YUE Yuan,YAO Min.Effect of sawdust and its conditioning mechanism on filtration dewatering of textile wastewater sludge[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(5):109-114.DOI:
| Title: | Effect of sawdust and its conditioning mechanism on filtration dewatering of textile wastewater sludge |
| 作者: | 陈 斌, 高华生 *, 季文杰, 朱剑炯, 岳 远, 姚 敏 |
| Author(s): | CHEN Bin, GAO Hua-sheng *, JI Wen-jie, ZHU Jian-jiong, YUE Yuan, YAO Min |
| 关键词: | 木屑; 印染污泥; 调理; 比阻 |
| Keywords: | sawdust; textile wastewater sludge; conditioning; SRF |
| 分类号: | X796 |
| 文献标识码: | A |
| 摘要: | 通过真空抽滤试验, 研究了木屑对印染污泥脱水的助滤作用及调理机理. 结果表明, 木屑投加量为100%DS(以污泥中干固体计)时, 污泥比阻从2.45×109 s2·g-1降至1.79×109 s2·g-1, 泥饼含水率从85.87%降至74.29%, 泥饼质量增加了28.24%. 木屑与FeCl3或CaO联合调理污泥时, 污泥比阻和泥饼含水率均有所降低, 但泥饼质量均增加. 从结构观察、泥饼可压缩和吸水平衡等方面, 探讨了木屑助滤剂影响污泥脱水过程的机理, 综合评价木屑作为骨架构建剂在污泥调理中具有正反两方面的作用, 即一方面提高污泥脱水的速率, 降低泥饼的含水率, 另一方面会导致泥饼的质量增加. |
| Abstract: | The effect of sawdust conditioner on filterability of textile wastewater sludge is explored through vacuum filtration experiment. The results indicate that when sludge is conditioned by 100%DS (based on dry solid of sludge) sawdust, the specific resistance to filtration (SRF) decreases from initial 2.45×109 s2·g-1 to 1.79×109 s2·g-1, and the sludge cake moisture declines from 85.87% to 74.29%, while the sludge cake mass increases by 28.24%. When sludge is conditioned by sawdust together with FeCl3 or CaO, it is found that the SRF of sludge and the cake moisture both decrease while the sludge cake mass increases. The discussion on the mechanism of sawdust conditioning is conducted based on microstructure observation, cake compressibility and sludge-water equilibrium of sawdust-sludge mixture. It is verified that the roles played by the sawdust as skeleton builder proves controversial in sludge conditioning. On one hand, it may accelerate the sludge dewatering process and decrease the cake moisture, while on the other hand it may also increase the mass output of the sludge cake. |
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| 备注/Memo: | 收稿日期: 2017－12－08. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（21507065）. 第一作者: 陈斌（1991－）, 男, 浙江宁波人, 在读硕士研究生, 主要研究方向: 固体废物处理与资源化. E-mail: 1223039362@qq.com *通信作者: 高华生（1965－）, 男, 安徽安庆人, 博士/副教授, 主要研究方向: 污染控制技术. E-mail: gaohuasheng@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
