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Reduction of methane and nitrous oxide emissions from stormwater bioretention cells through microbial electrolytic cells
Bioresource Technology ( IF 9.7 ) Pub Date : 2024-09-04 , DOI: 10.1016/j.biortech.2024.131444
FangYue Cai 1 , XiaoJun Zuo 2 , Jie Xiong 1 , WeiLi Jiang 3
Affiliation  

This study investigated the reduction of methane (CH4) and nitrous oxide (N2O) emissions from stormwater bioretention cells through microbial electrolytic cell (MEC), showing the largest reduction of 32.21 % (CH4) at 9.2 μA/m2 of current density and 56.16 % (N2O) at 3.5 μA/m2 of current density, compared with the corresponding in the control (0 μA/m2 of current density). Kinetic of CH4 and N2O emissions could be well fitted by Logistic model with high correlation coefficient (R2 > 0.9500) and model efficiency (ME > 0.95) but low relative root mean square error (RRMSE < 7.88). The increase of pmoA and polysaccharide (PS) were responsible for CH4 reduction, while N2O reduction was attributed to the decrease of nirS and the increase for nosZ and protein (PN), which could explain the lowest GWPd (10.67 mgCO2-eq/m2/h) at 3.5 μA/m2 of current density, suggesting that MEC could be promising for the reduction of CH4 and N2O emissions from bioretention cells.

中文翻译:


通过微生物电解槽减少雨水生物滞留池的甲烷和一氧化二氮排放



本研究调查了通过微生物电解槽 (MEC) 减少雨水生物滞留池的甲烷 (CH4) 和一氧化二氮 (N2O) 排放,结果显示,与对照组中的相应值(电流密度 0 μA/m2)相比,电流密度为 9.2 μA/m2 时最大减少 32.21 % (CH4) 和 56.16 % (N2O) 电流密度为 3.5 μA/m2。CH4 和 N2O 发射的动力学可以用高相关系数 (R2 > 0.9500) 和模型效率 (ME > 0.95) 但相对均方根误差低 (RRMSE < 7.88) 的 Logistic 模型很好地拟合。pmoA 和多糖 (PS) 的增加是 CH4 降低的原因,而 N2O 的降低归因于 nirS 的降低以及 nosZ 和蛋白质 (PN) 的增加,这可以解释在 3.5 μA/m2 电流密度下最低的 GWPd (10.67 mgCO2-eq/m2/h),表明 MEC 可能有望减少生物滞留细胞的 CH4 和 N2O 排放。
更新日期:2024-09-04
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