植物阴极-沉积型微生物燃料电池处理含铬废水  

Plant Cathode-Sediment Microbial Fuel Cell for Restoration of Chromium‑containing Wastewater

作　　者：吴卿[1] 马梦醒 李倩男 刘洁琼 彭森[1] WU Qing;MA Meng‑xing;LI Qian‑nan;LIU Jie‑qiong;PENG Sen(School of Environmental Science and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学环境科学与工程学院,天津300350

出　　处：《中国给水排水》2024年第7期27-35,共9页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07203-009)。

摘　　要：应用植物阴极-沉积型微生物燃料电池(PC-SMFC)系统处理含铬废水及沉积物,探究了阴极材料和植物对PC-SMFC系统去除污染物效果及产电性能的影响。结果表明,以不锈钢网为阴极集电装置、菖蒲为植物的PC-SMFC装置的处理效果最佳,当上覆水Cr^(6+)初始浓度为108.14mg/L、COD初始浓度为978 mg/L时,可获得的最大输出电压和输出功率密度分别为0.4990 V和14.87 mW/m^(2),对上覆水中COD、Cr^(6+)的去除率分别为93.66%和99.29%,对沉积物中有机质和Cr^(6+)的去除率分别为15.69%和79.11%,对总铬的固定率为65.33%。经PC-SMFC系统处理后,各装置沉积物中生物有效态铬向较为稳定的铁锰结合态和残渣态铬转化,即PC-SMFC对稳定沉积物中的铬具有促进意义。This paper applied the plant cathode-sediment microbial fuel cell(PC-SMFC)system to treat chromium‑containing wastewater and sediment,and investigated the effects of cathode materials and plants on the pollutants removal performance and power generation capacity of the PC-SMFC system.The PC-SMFC with cathode current collector of stainless steel mesh and plant of calamus showed the best treatment performance.When the initial concentration of Cr^(6+)and COD in the overlying water was 108.14 mg/L and 978 mg/L,the maximum output voltage and power density were 0.4990 V and 14.87 mW/m^(2),respectively.The removal rates of COD and Cr^(6+)in the overlying water were 93.66%and 99.29%respectively,the removal rates of organic matter and Cr^(6+)in the sediment were 15.69%and 79.11%respectively,and the fixation rate of total chromium was 65.33%.After treatment by the PC-SMFC system,the bioavailable chromium in the sediments of each system was transformed into stable Fe-Mn binding state and residual chromium,meaning that PC-SMFC promoted the stabilization of chromium in the sediment.

关 键 词：植物阴极-沉积型微生物燃料电池 含铬废水 底泥 阴极材料 

分 类 号：TU992[建筑科学—市政工程]