微电解-电极生物膜法在污水深度处理中的应用  

Advanced Treatment of Polluted Water Using Micro-ElectrolysisBiofilm-Electrode Process

作　　者：郭子军[1,2] 田学达[1] 余辉[2] 牛远[2] 姚理为 刘倩[2] 刘勇丽 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105 [2]中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012 [3]湖南鑫力恒环保科技有限公司,湖南长沙410000

出　　处：《环境科学研究》2015年第6期1001-1007,共7页Research of Environmental Sciences

基　　金：国家水体污染控制与治理科技重大项目(2012ZX07101-001)

摘　　要：为考察微电解-电极生物膜法的污水深度处理效果,以受污染河水为处理对象,以碳素纤维作为微电解和电极生物膜的电极材料,研究微电解和电极生物膜的污水处理特点及运行条件.结果表明:微电解可有效去除污水中PN(颗粒态总氮)、PP(颗粒态总磷)、DTP(溶解性总磷)和NH3-N,去除率分别达到94%、95%、93%和98%;其中DTP的去除以与微电解产生的Fe2+的沉淀反应为主,NH3-N的去除以硝化反应为主.微电解提高了有机物的去除率,但对DTN(溶解性总氮)的去除率较低.电极生物膜能有效去除污水中的NO3--N,对不同进水水质的适应性较强,脱氮以自养反硝化为主,异养反硝化可有效去除剩余有机物,ρ(NO3--N)低于45.0 mgL的污水经过电极生物膜处理后,NO3--N可被完全去除.在HRT(水力停留时间)为8 h、电流密度为0.10 m Acm2的条件下,微电解-电极生物膜法对各种污染物去除效果显著,工艺运行稳定,出水ρ(TN)和ρ(CODMn)平均值均低于0.5 mgL,ρ(TP)低于0.05 mgL,浊度小于1.0 NTU,可实现污水的深度处理.A combined micro-electrolysis reactor （MER） / biofilm-electrode reactor （BER） process was studied for treatment of polluted river water. The results indicated that MER could effectively remove PP, PN, DTP and NH3-N, with the removal effieiencies of PP, PN, DTP and NH3-N being 94% , 95% , 93% and 98% , respectively. The removal of NH3-N was mainly attributed to nitration reaction, and DTP was effectively removed by precipitation reaction with Fe^2＋, which was produced from micro-electrolysis. Additionally, MER improved the removal efficiency of the organic matter as well. However, the removal efficiency of DTN was relatively low. BER was suitable to different influents, and could effectively remove NO3 ^--N. Hydrogenotrophic denitrifieation process removed the majority of NO3^ --N, and the remaining organic matter was thoroughly removed by heterotrophie denitrifieation. NO3^ --N could be completely removed by the BER if the concentration was below 45.0 mg/L. The optimum operating conditions were HRT = 8 h and current density = 0. 1 mA/cm^2 , under which the average effluent concentrations of TN and CODMn were less than 0. 5 mg/L, TP was less than 0. 05 mg/L and the turbidity was below 1.0 NTU. In conclusion, the advanced treatment of polluted water could be achieved by the micro-electrolysis/ biofilm-electrode process.

关 键 词：微电解 电极生物膜 深度处理 碳素纤维 氢自养反硝化 

分 类 号：X52[环境科学与工程—环境工程]