Application of FeCl3 to Adjust Urban Sewage-Dewatered Sludge (UDSS) Containing Cationic Polyacrylamide (CPAM) for Further Dewatering

被引：10

作者：

Zhang, Jingzhen ^{[1
]}

Xia, Chao ^{[1
]}

Yue, Qinyan ^{[1
]}

Gao, Baoyu ^{[1
]}

Yang, Kunlun ^{[1
]}

Wu, Suqing ^{[1
]}

Kan, Yujiao ^{[1
]}

机构：

[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Prov Key Lab Water Pollut Control & Reso, Jinan 250100, Peoples R China

来源：

WATER AIR AND SOIL POLLUTION | 2017年 / 228卷 / 06期

关键词：

Dewatered sludge; Dewatering; FeCl3; Internal structure; Physicochemical properties; ACTIVATED-SLUDGE; DEWATERABILITY;

D O I：

10.1007/s11270-017-3377-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The urban sewage-dewatered sludge (UDSS) containing cationic polyacrylamide is difficult to dewater. FeCl3 was used as conditioner to adjust the UDSS. To investigate the effect and principle, the physicochemical properties of UDSS were evaluated in terms of dewatering equipment, micro electrophoresis, Malvern laser particle size analyzer, nuclear magnetic resonance analyzer, and scanning electron microscopy. Results showed that the network structure of UDSS produced by CPAM still had high negative charge, which locked much water in the flocs and resulted in the poor dewaterability of UDSS. When Fe3+ was added into the UDSS, the inner structure of sludge was destroyed by the charge neutralism and releasing more water. At the same time, because the function of precipitate produced by the hydrolytic action, the inner structure of the sludge was solidified; therefore, the compressibility of UDSS decreased. Finally, the dewaterability of UDSS was improved and the moisture content of filter cakes can be decreased to 55%.

引用

页数：9

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