Enhanced efficiency of the simultaneous treatment of sewage sludge and Cr(VI)-containing wastewater by CaO2 in microbial fuel cell
DONG Quan-sheng1, ZHAO Qing-liang1,2, YU Hang1,3, LIANG Zhu-yuan1, WANG Shu-tian1, WANG Kun1,2
1. School of Environment, Harbin Institute of Technology, Harbin 150090, China;
2. State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;
3. Institute of Environmental Pollution Control, Dalian Maritime University, Dalian 116026, China
To increase the efficiencies of sewage sludge degradation and hexavalent chromium reduction, the effect of CaO2 dosage on simultaneous treatment of sewage sludge and hexavalent chromium wastewater in microbial fuel cell (MFC) was studied. Specifically, the effect of different CaO2 dosage on the degradation of sewage sludge in the anodic chamber, reduction of hexavalent chromium in the cathodic chamber, and promotion of electricity generation in the MFC were also investigated. Results showed that when the CaO2 dosage were 0, 0.1, 0.2, 0.4, 0.6, 0.8gCaO2/gVSS, respectively, the hexavalent chromium reduction efficiencies were 73.38%, 78.91%, 99.47%, 97.70%, 97.04%, 96.37% after operating for 120h, and TCOD degradation efficiencies of sludge in anodic chamber were 72.4%, 76.9%, 81.0%, 78.2%, 75.7% and 74.2% after operating for 30days, demonstrating the enhanced effectiveness through CaO2 dosage. The optimal dosage was 0.2gCaO2/gVSS with voltage output of 1.15V. The reduction efficiency of hexavalent chromium was increased by 36.08% and the degradation efficiency of TCOD by 11.88%. In addition, the electrochemical activity of the MFC increased after the addition of CaO2, indicating that it can also enhance the efficiencies of sewage sludge degradation and hexavalent chromium reduction as well as accelerate the electron transfer process of the MFC.
董全胜, 赵庆良, 于航, 梁柱元, 王淑恬, 王琨. CaO2促进MFC同步处理剩余污泥和六价铬废水的效能[J]. 中国环境科学, 2019, 39(6): 2387-2394.
DONG Quan-sheng, ZHAO Qing-liang, YU Hang, LIANG Zhu-yuan, WANG Shu-tian, WANG Kun. Enhanced efficiency of the simultaneous treatment of sewage sludge and Cr(VI)-containing wastewater by CaO2 in microbial fuel cell. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2387-2394.
中华人民共和国环境保护部.2015年中国环境统计年报[M]. 北京:中国环境出版社, 2016.Ministry of environmental protection of the People's Republic of China.2015 China environmental statistics annual report[M]. Beijing:China Environment Press, 2016.
[2]
谢文强.六价铬对人体急性与慢性危害探究[J]. 资源节约与环保, 2016,(7):131+135.Xie W Q. Study on the effects of hexavalent chromium on human acute and chronic diseases[J]. Resource Conservation and Environmental Protection, 2016,(7):131+135.
[3]
Zhao Y X, Kang D J, Chen Z, et al. Removal of Chromium Using Electrochemical Approaches:A Review[J]. International Journal of Electrochemical Science, 2018,13(2):1250-1259.
[4]
Kim C M, Lee, C R, Song Y E, et al. Hexavalent chromium as a cathodic electron acceptor in a bipolar membrane microbial fuel cell with the simultaneous treatment of electroplating wastewater[J]. Chemical Engineering Journal, 2017,328:703-707.
[5]
Gupta S, Yadav A, Verma N. Simultaneous Cr(VI) reduction and bioelectricity generation using microbial fuel cell based on alumina-nickel nanoparticles-dispersed carbon nanofiber electrode[J]. Chemical Engineering Journal, 2017,307:729-738.
[6]
周秀秀,顾早立,郝小旋,等.剩余污泥燃料电池处理含铬废水的效能及机理[J]. 中国环境科学, 2014,34(9):2245-2251.Zhou X X, Gu Z L, Hao X X, et al. Efficacy and mechanism of microbial fuel cell treating Cr(VI)-containing wastewater with excess sludge as substrate[J]. China Environmental Science, 2014,34(9):2245-2251.
[7]
郝小旋,周秀秀,张姣,等.厌氧发酵污泥燃料电池处理含铬废水的效能及机理[J]. 中国环境科学, 2014,34(10):2581-2587.Hao X X, Zhou X X, Zhang J, et al. Efficacy and mechanism of microbial fuel cell treating Cr(VI)-containing wastewater with anaerobically fermented sludge as substrate[J]. China Environmental Science, 2014,34(10):2581-2587.
[8]
Yu H, Zhao Q L, Dong Q S, et al. Electronic and metagenomic insights into the performance of bioelectrochemical reactor simultaneously treating sewage sludge and Cr(VI)-laden wastewater[J]. Chemical Engineering Journal, 2018,341:495-504.
[9]
王晓燕.CaO2对污泥厌氧发酵水解过程的强化及其机理[J]. 江苏农业科学, 2017,45(16):247-249,254.Wang X Y. Strengthening and mechanism of CaO2 on hydrolysis process of sludge anaerobic fermentation[J]. Jiangsu Agricultural Science, 2017,45(16):247-249,254.
[10]
Li Y M, Wang J, Zhang A, et al. Enhancing the quantity and quality of short-chain fatty acids production from waste activated sludge using CaO2 as an additive[J]. Water Research, 2015,83:84-93.
[11]
GB 7467-87水质-六价铬的测定-二苯碳酰二肼分光光度法[S].GB 7467-87 Water quality-determination of hexavalent chromium-spectrophotometric method of diphenylcarbazide[S].
[12]
GB 11914-89水质-化学需氧量的测定-重铬酸盐法[S].GB 11914-89 Water quality-Determination of chemical oxygen demand-dichromate method[S].
[13]
国家环境保护总局.水和废水监测分析方法[M]. 4版.北京:中国环境科学出版社, 2002.The state environmental protection administration. Methods for monitoring and analyzing water and wastewater (fourth edition)[M]. Beijing:China Environmental Science, 2002.
[14]
Jain M S, Kalamdhad A S. Efficacy of batch mode rotary drum composter for management of aquatic weed (Hydrilla verticillata (L.f.) Royle)[J]. Journal of Environmental Management, 2018,221:20-27.
[15]
Xiao B Y, Yang F, Liu J X. Enhancing simultaneous electricity production and reduction of sewage sludge in two-chamber MFC by aerobic sludge digestion and sludge pretreatments[J]. Journal of Hazardous Materials, 2011,189(1/2):444-449.
[16]
Wang J, Li Y M. Synergistic pretreatment of waste activated sludge using CaO2 in combination with microwave irradiation to enhance methane production during anaerobic digestion[J]. Applied Energy, 2016,18(1):1123-1132.
[17]
崔玥,曾海祥,张凯.水产养殖中氧化还原电位的监测与调控技术[J]. 河北渔业, 2017,(4):54-55.Cui Y, Zeng H X, Zhang K. Monitoring and regulating technology of Redox potential in aquaculture[J]. Hebei Fisheries, 2017,(4):54-55.
[18]
曹楚南,张鉴清.电化学阻抗谱导论[M]. 北京:科学出版社, 2002.Cao C N, Zhang J Q. Introduction to electrochemical impedance spectroscopy[M]. Beijing:Science Press, 2002.
[19]
Adachi M, Sakamoto M, Jiu J T, et al. Determination of parameters of electron transport in dye-sensitized solar cells using electrochemical impedance spectroscopy[J]. The Journal of Physical Chemistry B, 2006,110(28):13872-13880.
[20]
He Z, Mansfeld, F. Exploring the use of electrochemical impedance spectroscopy (EIS) in microbial fuel cell studies[J]. Energy & Environmental Science, 2009,2(2):215-219.
[21]
Lu Z H, Girguis P, Liang P. Biological capacitance studies of anodes in microbial fuel cells using electrochemical impedance spectroscopy[J]. Bioprocess and Biosystems Engineering, 2015,38(7):1325-1333.
