玉米秸秆生物炭电极用于微生物燃料电池脱硫反硝化性能  

Desulfurization and denitrification performance of corn straw biochar electrode for microbial fuel cell

作　　者：闫佳丽 张铭川[1] 陈熙[1] 陈传杰 徐新阳[1] 蒋绍妍 YAN Jiali;ZHANG Mingchuan;CHEN Xi;CHEN Chuanjie;XU Xinyang;JIANG Shaoyan(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;College of Forestry,Liaoning Vocational College of Ecological Engineering,Shenyang 110101,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]辽宁生态工程职业学院林学院,沈阳110101

出　　处：《环境工程学报》2024年第3期718-726,共9页Chinese Journal of Environmental Engineering

基　　金：钢铁焦化联合企业场地复合污染综合治理技术研发与工程示范项目(2019YFC1803804);中央高校基本科研业务费专项资金(N2301021)。

摘　　要：研究了玉米秸秆生物炭作为微生物燃料电池电极的性能。阳极以S2-为单一电子供体,阴极以NO3-为电子受体,以碳毡为对照电极,考察玉米秸秆生物炭电极用于生物燃料电池同步脱硫反硝化的电化学性能、产电性能以及污染物去除能力,分析了不同硫氮质量浓度比对生物炭电极微生物燃料电池脱氮除硫效率以及输出电能的影响。结果表明,玉米秸秆生物炭电极微生物燃料电池实现了更高的交换电流密度(22.42×10^(-3)A·cm^(-2))和更低的电荷转移电阻(4.24Ω)。与碳毡电极相比,玉米秸秆生物炭电极微生物燃料电池最大输出电压和最大功率密度分别提升了18.91%和16.67%。当硫氮比为5:4时,反应器脱硫反硝化和产电能力最佳。阳极室S2-出水质量浓度由120 mg·L^(-1)降至1.08 mg·L^(-1),去除率为99.1%,其中76.52%转化为SO_(4)^(2-)-S,阴极室NO_(3)^(-)-N去除率为94.5%。此时反应器输出电压和功率密度也达到最大值,分别为450.68 mV和1.03 W·m^(-2)。In this study,the performance of corn straw biochar as the electrode of microbial fuel cell was investigated.The anode and cathode were configured with S^(2−)as the exclusive electron donor,and with NO_(3)^(−)as the electron acceptor,respectively,and carbon felt was employed as the reference electrode to assess the electrochemical performance,power generation capability,and pollutant removal capacity of the corn stalk biochar electrodes in the simultaneous desulfurization-denitrification microbial fuel cells.Furthermore,the influences of different sulfur-to-nitrogen concentration ratios on the denitrification and desulfurization efficiency and the electrical energy output of the biochar electrode microbial fuel cells were explored.The experimental results show that the corn straw biochar microbial fuel cell achieved higher exchange current density(22.42×10^(−3)A·cm^(-2))and lower charge transfer resistance(4.24Ω).Compared with carbon felt electrode,the maximum output voltage and power density of microbial fuel cell with corn straw biochar electrode increased by 18.91%and 16.67%,respectively.When the ratio of sulfur to nitrogen was 5:4,the best desulfurization,denitrification and electricity generation capacity occurred for the reactor.The effluent concentration of S^(2-)in anode chamber decreased from 120 mg·L^(-1)to 1.08 mg·L^(-1),and the removal rate was 99.1%,of which 76.52%converted to SO_(4)^(2−)-S,and the removal rate of NO_(3)^(-)-N in cathode chamber was 94.5%.At this time,the output voltage and power density of the reactor reached the maximum values,which were 450.68 mV and 1.03 W·m^(-2),respectively.

关 键 词：微生物燃料电池 生物炭 脱硫反硝化 电催化 

分 类 号：X703[环境科学与工程—环境工程]