Modification of the condensed sludge from the woolscouring wastewater distilling tower and its effect on the sludge dewaterability
Received date: 2004-09-24
Revised date: 2004-09-24
Online published: 2010-10-01
The woolscouring condensed sludge derived from the woolscouring wastewater-distilling tower is charac-terized by a higher amount of organic matter and plant nutrients, having heating value. But it is difficult to dispose and reutilize the sludge properly because it contains a great deal of lanoline, alkalinity, and viscidity. In the light of the principles of the surfactant emulsification and demulsification, the combined approaches to treat the woolsouring condensed sludge, including the addition of chemical acid, flocculant, and demulsifier under optimum reaction temperature have been used. The results show that the stability and emulsification of the sludge are destroyed effectively through the above approach. The resistance rate of the sludge is decreased from 9.81 × 1013 m/kg to 2.48 × 1011 m/kg. Consequently, the mechanical dewatering of the sludge could be performed easily, provides a brand new pretreatment process for the reutilization of woolscouring sludge.
Key words: woolscouring wastewater; sludge modification; dewaterability
He Feng, Zhou Lixiang . Modification of the condensed sludge from the woolscouring wastewater distilling tower and its effect on the sludge dewaterability[J]. Industrial Water Treatment, 2005 , 25(1) : 25 -28 . DOI: 10.11894/1005-829x.2005.25(1).25
[1] 王杰,肖锦,詹怀宇.两性高分子絮凝剂在污泥脱水上的应用研究[J].工业水处理,2000,20(8):28-30
[2] 赵庆祥.污泥资源化技术[M].北京:化学工业出版社,2002.7-8
[3] 蒋木庚,杨红.有机分析[M].南京:南京大学出版社,1996.20~25
[4] 杜仰民,马华继,张建民,等.洗毛废水处理与资源回收利用[J].工业水处理,2000,20(7):16-18
[5] William Jones F, Westmoreland David J. Degradation of nonylphenol ethoxylates during the composting of sludge from woolscour effluent[J]. Environ. Sci. Technol., 1998, 32(17): 2 623-2 627
[6] Maheswaran Jay, et al. Potential for agri-industry wastes as soil ameliorants[R]. Progress report RIRDC project No RMI-10A, Melbourne, Austrilia, 1998
[7] Stokes Josephine, Justine Cody, Jay Maheswaran. A long-term study into compost applications for broadacre cropping[J]. Geelong,Victoria. Australian Society of Agronomy, 2003,2 (1): 2 - 6
[8] Williamson H W M, Greenfield L G, Beare M H. Biodegradation assessment of woolscour sludge and fellmongery sludge[J]. J. Environ. Qual., 2000,29(6): 1 998-2 006
[9] 许闽明.厌氧-气浮-A/O接触氧化工艺处理洗毛废水[J].工业水处理,2003,23(2):56-58
[10] 张国浦.生物接触氧化法处理洗毛废水[J].湿法冶金,2001,20(2):96-99
[11] 鲁玉龙.洗毛废水处理工艺现状及技术探讨[J].环境保护,2002,(2):20-21
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