Effect of sludge conditioning by microbial fuel cell on electro-dewatering performance

被引:5
作者
Shen, Jiuqi [1 ]
Zhou, Xingqiu [1 ,2 ]
Zhou, Lang [3 ]
Huang, Zhongjun [4 ]
Huang, Shufeng [1 ]
机构
[1] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China
[2] Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clus, Guangzhou 510006, Peoples R China
[3] Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
[4] Shenzhen Shenshui Longgang Sewage Treatment Co Ltd, Shenzhen 518000, Peoples R China
关键词
Electro-dewatering; Sludge; Microbial fuel cell; Sludge conditioning; WASTE-WATER SLUDGE; ACTIVATED-SLUDGE; SEWAGE-SLUDGE; ORGANIC-MATTER; DEWATERABILITY; CONFIGURATION; MIGRATION; CASCADE;
D O I
10.1016/j.jwpe.2023.104137
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Electro-dewatering (EDW) is an efficient and energy-saving technology for deep dewatering of sludge. It is significantly influenced by the physicochemical properties (e.g., conductivity, pH and zeta potential) of sludge, which can be altered by conditioning. In this study, sludge conditioning by microbial fuel cell (MFC) was innovatively coupled with EDW. In a single-chamber MFC filled with municipal sludge, a maximum power density of 436 mW/m(3) was achieved after a 5-day operation. Substantial changes in the physicochemical properties of the sludge were observed. Compared with raw sludge, the sludge subjected to 7-day MFC conditioning had higher liquid-phase conductivity (425 mu S/cm vs. 301 mu S/cm), higher pH (6.8 vs. 6.3) and a more negative zeta potential (-16.0 mV vs. -12.8 mV). These changes facilitated EDW. Generally, longer MFC conditioning time led to higher electric current, higher filtrate flow rate and less final moisture content during a 12-min constant-voltage (25 V) EDW process. The final sludge moisture content after EDW was 64.0 % without conditioning and 54.8 % with 7-day MFC conditioning. Although sludge EDW with longer MFC conditioning time required more energy, the dewatering efficiency was noticeably higher, making the process more economically beneficial. Seven days of MFC conditioning is the recommended scheme in this study due to its low Ksi (1.6 kWh.h/kg(DS)(2)) and the potential to generate similar to 0.0336 USD/ton dry solids as green energy revenue. The study has newly developed an MFC-EDW coupled process that recovers bioresources through electricity generation while MFC conditions the sludge to facilitate EDW simultaneously.
引用
收藏
页数:9
相关论文
共 50 条
[41]   Insight to peroxone-Fe(III) joint conditioning-horizontal electro-dewatering process on water reduction in activated sludge: Performance and mechanisms [J].
Gao, Shihui ;
Wang, Yili ;
Zhang, Daxin ;
Fan, Xiaoyang ;
Guo, Yajie ;
Li, Enrui ;
Zheng, Huaili .
JOURNAL OF HAZARDOUS MATERIALS, 2021, 402
[42]   Electro-dewatering of sludge using tip electrodes: Influence of operating conditions and mechanism of dewatering [J].
Peng, Chao ;
Shi, Mingzhu ;
He, Shilong ;
Dai, Guofu ;
Shen, Guohua ;
Yao, Guanwei ;
Yang, Jiahao ;
Duan, Chenlong ;
Li, Peng .
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 2025, 13 (03)
[43]   Effect of electric field strength on electro-dewatering efficiency for river sediments by horizontal electric field [J].
Wu, Pan ;
Shi, Yafei ;
Wang, Zheng ;
Xiong, Ziming ;
Liu, Defu ;
Gerson, Andrea R. ;
Pi, Kewu .
SCIENCE OF THE TOTAL ENVIRONMENT, 2019, 647 :1333-1343
[44]   Effect of Sludge Conditioning Temperature on the Thickening and Dewatering Performance of Polymers [J].
Yan, Ze ;
Ormeci, Banu ;
Zhang, Jinli .
JOURNAL OF RESIDUALS SCIENCE & TECHNOLOGY, 2016, 13 (03) :215-224
[45]   Migration of ions and organic matter during electro-dewatering of anaerobic sludge [J].
Tuan, Pham-Anh ;
Sillanpaa, Mika .
JOURNAL OF HAZARDOUS MATERIALS, 2010, 173 (1-3) :54-61
[46]   Insights into the mechanism of sludge-based biochar in electro-dewatering and energy consumption optimization [J].
Yang, Yahong ;
Ma, Pengjin ;
Li, Yangying ;
Chen, Yirong ;
Zhang, Huining .
JOURNAL OF WATER PROCESS ENGINEERING, 2024, 68
[47]   Inactivation mechanisms of bacterial pathogen indicators during electro-dewatering of activated sludge biosolids [J].
Daneshmand, Tala Navab ;
Beton, Raphael ;
Hill, Reghan J. ;
Gehr, Ronald ;
Frigon, Dominic .
WATER RESEARCH, 2012, 46 (13) :3999-4008
[48]   Migration and distribution of water and organic matter for activated sludge during coupling magnetic conditioning horizontal electro-dewatering (CM-HED) [J].
Qian, Xu ;
Wang, Yili ;
Zheng, Huaili .
WATER RESEARCH, 2016, 88 :93-103
[49]   Variations of moisture and organics in activated sludge during Fe0/S2O82- conditioning-horizontal electro-dewatering process [J].
Li, Haoxuan ;
Wang, Yili ;
Zheng, Huaili .
WATER RESEARCH, 2018, 129 :83-93
[50]   Effect of charge neutralization on the dewatering performance of alum sludge by polymer conditioning [J].
Wu, CC ;
Wu, JJ .
WATER SCIENCE AND TECHNOLOGY, 2001, 44 (10) :315-319