Preparation of spherical nano-CaO2 and its application in sludge deep-dewatering coupled with electro-osmotic

被引：0

作者：

Li Y. ^{[1
]}

Liu L. ^{[1
]}

Li K. ^{[1
]}

Lin K. ^{[2
]}

Dou X. ^{[1
]}

Bi Y. ^{[1
]}

机构：

[1] Department of Resources and Environment, Henan Institute of Engineering, Zhengzhou

[2] College of Resources and Environment, Yangtze University, Wuhan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 07期

关键词：

Calcium peroxide; Dewatering; Electro-osmotic; Oxidation; Sewage sludge; Waste treatment;

D O I：

10.16085/j.issn.1000-6613.2020-1552

中图分类号：

学科分类号：

摘要：

In order to investigate the feasibility of sewage sludge deep-dewatering by coordination of nano-CaO2 and electro-osmotic, the nano-CaO2 was fabricated by calcium salt method under optimized parameters firstly, and then the prepared nano-CaO2 coupled with electro-osmotic were used to investigate the deep-dewatering of sewage sludge. The results showed that the purity, yield and morphology of CaO2 would be affected by dispersant dosage, stirring speed, the dosage and drip rate of H2O2.The purity and yield of CaO2 could reach 79.13% and 74.62% with dispersant dosage of 100mL, stirring speed of 500r/min, drip rate of 0.75mL/min and H2O2 dosage of 22.5mL respectively. Homemade nano-CaO2 was spherical or ellipsoidal, with a particle size within 45-300nm. The water content of dewatered sludge could be reduced to 67.52% with self-made nano-CaO2 dosage of 100mg/g DS, voltage of 50V, initial sludge dosage of 705g. Compared to commercially available CaO2 under the same conditions, the water content of dewatered sludge was reduced by 10.91%. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：4047 / 4054

页数：7

共 25 条

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