Sewage sludge drying method combining pressurized electro-osmotic dewatering with subsequent bio-drying

被引：29

作者：

Li, Qian ^{[1
]}

Lu, Xuebin ^{[1
]}

Guo, Haigang ^{[2
]}

Yang, Zengjun ^{[1
]}

Li, Yingte ^{[1
]}

Zhi, Suli ^{[3
]}

Zhang, Keqiang ^{[3
]}

机构：

[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300354, Peoples R China

[2] Hebei Univ Engn, Handan 056038, Peoples R China

[3] Minist Agr, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2018年 / 263卷

关键词：

Sewage sludge; Dewatering; Pressurized electro-osmotic dewatering; Bio-drying; WASTE-WATER SLUDGE; AGENT PARTICLE-SIZE; BULKING AGENT; ACTIVATED-SLUDGE; PILOT-SCALE; INOCULATION; BACTERIAL; MATURITY; TRANSFORMATION; COMMUNITIES;

D O I：

10.1016/j.biortech.2018.04.110

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, pressurized electro-osmotic dewatering (PEOD) as a pretreatment process, instead of the conventional practice of adding bulking agents, for sewage sludge bio-drying was proposed. Initially, various parameters were optimized for obtaining dewatered sewage sludge (DSS), treated by an efficient, quick, and energy-saving PEOD process. The results show that the moisture content (MC) of sewage sludge could decrease from 83.41% to 60.0% within 7.5 min in the optimum conditions of the PEOD process. Subsequently, two DSS bio-drying tests were carried out to investigate the effects of inoculation. The highest temperature (68.1 degrees C) was obtained for T2 (inoculation), which was 3.6 degrees C higher than that for T1 (non-inoculation). The MC accumulative removal rate for T1 (41.49%) was slightly less than that for T2 (44.60%). Lastly, the volatile solid degradation dynamics model parameters were measured. The degradation rate constants (k) for T1 and T2 were 0.00501 and 0.00498, respectively.

引用

页码：94 / 102

页数：9

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