Highly effective in-depth dewatering of excess sludge using methanol

doi:10.1039/c4ra08628g

	Highly effective in-depth dewatering of excess sludge using methanol
	Yang, Xue 1; Wang, Li1 ; Zhang, Chen 2; Zou, Weiguo 2; Tan, Xuejun 2; Liu, Xiang 1; Wan, Chunli 1,3; Wang, XingZu3
刊名	RSC ADVANCES
	2014
卷号	4 期号:90 页码:48952-48958
ISSN号	2046-2069
DOI	10.1039/c4ra08628g
英文摘要	In-depth dewatering of excess sludge facilitates cost reduction of wastewater treatment plants, and makes final disposal of sludge more economically feasible. In this study, contact with methanol was selected as an improved method to achieve in-depth sludge dewatering. After 30 min methanol contact and subsequent natural drying at ambient temperature for 6 h, the water content of the sludge was reduced to 13.4%. The thermogravimetric analysis showed that the organic substance content (per unit weight) of the dewatered sludge was 3-fold higher than untreated sludge. The results suggested that methanol-aided dewatering did not influence the availability of sludge for subsequent utilization or energy recovery. The microorganisms that were retained in dewatered sludge were found to be Gram-negative bacteria, whose adaptive phospholipid composition possibly improved their tolerance to methanol. Hence, the methanol-aided dewatering mechanism can be concluded as (1) disruption of EPS structure and damage of cell membrane and (2) release and re-distribution of interstitial water. Furthermore, the optimal dewatering efficiency and operation parameters were predicted using response surface methodology, which could act as reference values for engineering application.
资助项目	Shanghai International Science and Technology Cooperation Fund[14230700400] ; State Key Laboratory of Pollution Control and Resource Reuse Foundation[PCRRF13009] ; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Science[RAE2014CB05B] ; National Science Foundation of China[51108093]
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000343711000025
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/1111]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Liu, Xiang
作者单位	1.Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China 2.Shanghai Municipal Engn Design Gen Inst, Shanghai 200092, Peoples R China 3.Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xue,Wang, Li,Zhang, Chen,et al. Highly effective in-depth dewatering of excess sludge using methanol[J]. RSC ADVANCES,2014,4(90):48952-48958.
APA	Yang, Xue.,Wang, Li.,Zhang, Chen.,Zou, Weiguo.,Tan, Xuejun.,...&Wang, XingZu.(2014).Highly effective in-depth dewatering of excess sludge using methanol.RSC ADVANCES,4(90),48952-48958.
MLA	Yang, Xue,et al."Highly effective in-depth dewatering of excess sludge using methanol".RSC ADVANCES 4.90(2014):48952-48958.