摘要
为提高双阴极MFC的脱氮性能,构建了分段进水的双阴极微生物燃料电池系统,以考察了厌氧室和缺氧室分段进水的进水分配比MFC脱氮产电性能的影响。通过监测实验过程中各极室NO3--N、NO2--N、NH4+-N、COD的去除情况以及MFC各项产电指标的变化情况,分析进水分配比对电池性能的影响。结果表明:采用分段进水的MFC能有效提高MFC对总氮的去除效果,进水配水比为1∶1时对TN的去除效果最好,去除率由49.89%提升至79.94%;缺氧室进水流量越高对NO3--N的去除效果越好,进水配水1∶3时,NO3--N出水浓度由17.28 mg·L-1降至2.93 mg·L-1。分段进水对产电性能的抑制明显,尤其是在缺氧阴极,缺氧室进水流量越高抑制越明显,缺氧阴极的功率密度由100.63 mW·m-3降低至0.03 mW·m-3。本研究探明了进水配水比对分段进水双阴极MFC脱氮产电性能的影响,为进一步提高MFC脱氮产电性能提供依据。
In order to improve the nitrogen removal performance of double cathode MFC, it constructs the double cathode microbial fuel cell system in step-feed, so that it can observe the on the influence of water distribution ratio on staphylococcal typing bacteriophage and oxygen-poor chamber on the electricity generation by MFC nitrogen removal. By means of the supervision on the removal in electrode compartments of NO3--N, NO2--N, NH4+-N, and COD and also the change of electricity generation indicators of MFC, it can analyze the influence of water distribution ratio on the battery performance. The result shows that MFC adopting step-feed can effectively improve the removal of MFC on total nitrogen, when the water distribution ratio is at 1:1, it has the best effect on the removal of TN, and the removal rate is improved from 49.89 % to 79.94 %;the higher of the water flow is in oxygen-poor chamber, the best removal effect is on NO3--N;while when the water distribution ratio is at 1:3, the effluent’s concentration of NO3--N is reduced from 17.28 mg·L-1 to 2.93 mg·L-1. The method of step-feed has obvious inhibiting effect on electricity generation performance, especially in the cathode of oxygen-poor, the higher of the water flow in oxygen-poor chamber is, the more obvious of the inhibiting effect is, and the power density in the cathode of oxygen-poor is reduced from 100.63 mW·m-3 to 0.03 mW·m-3. This research explores the influence of water distribution ratio on double cathode electricity generation by MFC nitrogen removal, which can provide reference for further improving electricity generation by MFC nitrogen removal.
作者
李哲远
崔心水
李亚妮
Li Zheyuan;Cui Xinshui;Li Ya’ni(School of Urban Planning and Municipal Engineering,Xi′an Polytechnic University,Xi′an 710048,China)
出处
《广东化工》
CAS
2020年第4期12-14,共3页
Guangdong Chemical Industry
基金
大学生创新创业训练计划项目(201910709015)。
关键词
双阴极
微生物燃料电池
分段进水
脱氮
产电
microbial fuel cells
dual-cathode
external resistor
nitrogen removal
electricity production
作者简介
李哲远(1994-),男,山西人,硕士研究生,主要研究方向水处理及其资源化。
