Effects of tannery sludge incineration slag pretreatment on sludge dewaterability

被引：58

作者：

Ning, Xun-an ^{[1
]}

Luo, Haijian ^{[1
]}

Liang, Xiujuan ^{[1
]}

Lin, Meiqing ^{[1
]}

Liang, Xin ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2013年 / 221卷

关键词：

Tannery sludge; Sludge incineration slag; Dewaterability; Compressibility; Porosity; MUNICIPAL SOLID-WASTE; MSWI BOTTOM ASH; SEWAGE-SLUDGE; ALUM SLUDGE; SCALE TEST; FLY-ASH; POLYMER; OPTIMIZATION; RESIDUES; GYPSUM;

D O I：

10.1016/j.cej.2013.01.106

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Chemical conditioning pretreatment does not always improve sludge dewaterability sufficiently for flocculated sludges with high compressibilities. In this study, tannery sludge incineration slag (TSIS) was used as a skeleton builder, in combination with cationic polyacrylamide (CPAM), to condition tannery sludge. The results showed that pretreating the sludge with a combination of TSIS and CPAM considerably improved sludge dewaterability over CPAM conditioning alone. The optimum TSIS and CPAM dosages were 150% dry solid (DS) and 10 kg/t DS, respectively, which generated a maximal net sludge solids yield (10.3 kg/m(2) h) and a minimal time to filter (7 s). The negative charge of the sludge particles was neutralized by the positive charge of the dissolved metal ions of the TSIS, resulting in larger floc sizes. Compressibility and porosity measurements and scanning electron microscope (SEM) images indicated that the TSIS formed a porous and incompressible structure during mechanical dewatering. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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