CONVERSION OF HEAVY METAL FRACTIONS IN WASTE-ACTIVATED SLUDGE DURING ANAEROBIC DIGESTION

被引：0
|
作者：
Liu, Xiaoguang [1 ]
Dong, Bin [1 ]
Dai, Lingling [1 ]
Dai, Xiaohu [1 ]
机构：
[1] Tongji Univ, Coll Environm Sci & Engn, Natl Engn Res Ctr Urban Pollut Control, Shanghai 200092, Peoples R China
来源：
FRESENIUS ENVIRONMENTAL BULLETIN | 2012年 / 21卷 / 10期
关键词：
chemical speciation analysis; heavy metals; waste activated sludge; anaerobic digestion; SEQUENTIAL EXTRACTION PROCEDURE; SEWAGE-SLUDGE; SPECIATION; SAMPLES;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The conversion of chemical fraction with typical heavy metals was investigated, and feasibility for agricultural use of sludge samples was accessed in this work. Anaerobic digestion experiment was conducted on waste-activated sludge from a wastewater treatment plant. Typical heavy metals in sewage sludge were extracted by Tessier step extraction method, and the content of each form as well as total concentration of heavy metals was determined by ICP-OES. The results showed that the heavy metal forms changed obviously during anaerobic digestion, from unstable form to organic matter-bound and residual form, which are relatively stable. Anaerobic digestion can effectively decrease heavy metals mobility and bioavailability of sludge. Sludge after anaerobic digestion can be better for land-use.
引用
收藏
页码：2896 / 2900
页数：5
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