生活污水有机负荷率对连续流单室无膜微生物电解池性能的影响

发布时间：2018-07-10 17:03

本文选题：连续流微生物电解池 + 有机负荷率　；参考：《应用与环境生物学报》2017年03期

【摘要】：连续流微生物电解池能有效应用于污水处理中,为了解不同有机负荷率(OLR)对单室微生物电解池(MEC)性能的影响,采用连续流方式,以生活污水为基质,研究恒定外加电压0.6 V、不同OLR(810、920、1 080、1 484、1 680、2 531、2 780 mg L~(-1) d~(-1))情形下化学需氧量(COD)去除率、甲烷(CH4)产率及能耗等.结果表明,随着OLR增加,COD去除率和能量消耗呈降低趋势,而CH4产率呈增加趋势.实验初期,外加电压为0.6 V,进水COD浓度为200 mg/L,MEC对COD去除率达到70%,而厌氧消化(AD)只能达到41%,此时MEC中CH4含量为8.39%,而AD只有6.44%.实验过程中,外加电压为0.6 V,OLR为2 780 mg L~(-1) d~(-1)时,CH4产率达到了(126.72±0.30)m L L~(-1) d~(-1),而能量消耗为(0.032 0±0.0052)k W h/kg COD.菌群高通量分析结果显示,MEC阳极碳毡的优势菌群为Methanothrix sp.和Geobacter sp.,其丰度分别为39.05%和21.83%,而AD组相应丰度只占2.00%和11.76%.综上,MEC可以在低能耗下有效处理低浓度生活污水并同步产CH4,这为生活污水处理提供了新的思路.
[Abstract]:Continuous flow microbial electrolysis cell can be used in wastewater treatment effectively. In order to understand the effect of different organic loading rate (OLR) on the performance of single chamber microbial electrolytic cell (MEC), a continuous flow method with domestic sewage as the matrix is adopted. Chemical oxygen demand (COD) removal rate, methane (CH4) yield and energy consumption were studied under constant applied voltage of 0.6 V, different OLR (810 ~ 920 ~ 1 080,1 484) ~ 1 680,2531 ~ (-1) ~ (2 780) mg / L ~ (-1) d ~ (-1). The results showed that with the increase of OLR, the removal rate of COD and energy consumption decreased, while the yield of CH4 increased. At the beginning of the experiment, the applied voltage was 0.6 V, the influent COD concentration was 200 mg / L MEC and the COD removal rate was 70%, while the anaerobic digestion (AD) could only reach 41%. At this time, the CH4 content in MEC was 8.39 and AD was 6.44%. In the experiment, the yield of CH4 reached (126.72 卤0.30) mL L ~ (-1) d ~ (-1) and the energy consumption was (0.032 0 卤0.0052) kW h/kg COD when the applied voltage was 0.60 mg / L ~ (-1) d ~ (-1) and the applied voltage was 2.780 mg / L ~ (-1) d ~ (-1). The results of high throughput analysis showed that the dominant flora of MEC anodic carbon felt was Methanothrix sp. And Geobacter sp., their abundance was 39.05% and 21.83%, respectively, while the corresponding abundance in AD group was 2.00% and 11.76%, respectively. MEC can effectively treat low concentration domestic sewage and produce CH4 simultaneously under low energy consumption, which provides a new idea for domestic sewage treatment.
【作者单位】：四川大学生命科学学院;中国科学院成都生物研究所;
【基金】：国家自然科学基金项目(31270166)资助~~
【分类号】：TM911.45;X799.3

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