Improvement of acidification on dewaterability of oily sludge from flotation
文献类型：期刊论文
| 作者 | Guo, Shuhai1; Li, Gang1; Qu, Jiuhui3; Liu, Xilin2 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 168期号:2页码:746-751 |
| 关键词 | Oily Sludge Acidification Floc Breakage Dewaterability |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2011.01.070 |
| 英文摘要 | This paper presents the improvement of acidification on the dewaterability of oily sludge from a flotation process. Various parameters, including the volume of supernatant water, capillary suction time (CST), and specific resistance to filtration (SRF) were used to evaluate the dewaterability of oily sludge. In addition, floc size distribution and release rates of Al(III) were used to explain skeleton breakage as a result of the acidification treatment. Results show that dewaterability increased obviously as the sludge pH decreased. After 120 min of settling, the volume of supernatant water reached 77% at pH 4.0. Maximum reductions in CST and SRF were 93.1% and 89.2%, respectively. Following acidification, the flocs in the oily sludge achieved a broader particle size distribution and a smaller median diameter [d (0.5)] of 36.0 mu m (cf. 74.4 mu m for the raw sample). In addition, lower pH led to a greater rate of release of AI(III). This study verifies that the floc skeleton of oily sludge can be broken through the dissolution of aluminum hydroxide; i.e., acidification enhances the dewaterability of oily sludge by changing the floc structure. All results indicate that acidification is advisable as a pretreatment of oily sludge. (C) 2011 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000290133700030 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://210.72.129.5/handle/321005/121705]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Guo, Shuhai |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China 2.CNPC, Liaohe Co Oilfield, Panjin 124010, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Shuhai,Li, Gang,Qu, Jiuhui,et al. Improvement of acidification on dewaterability of oily sludge from flotation[J]. CHEMICAL ENGINEERING JOURNAL,2011,168(2):746-751. |
| APA | Guo, Shuhai,Li, Gang,Qu, Jiuhui,&Liu, Xilin.(2011).Improvement of acidification on dewaterability of oily sludge from flotation.CHEMICAL ENGINEERING JOURNAL,168(2),746-751. |
| MLA | Guo, Shuhai,et al."Improvement of acidification on dewaterability of oily sludge from flotation".CHEMICAL ENGINEERING JOURNAL 168.2(2011):746-751. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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