作　　者： ; ; ; ; ;

机构地区： 华南理工大学

出　　处： 《水处理技术》 2013年第6期87-93,共7页

摘　　要： 针对电极生物膜法自养反硝化能力有限以及电化学氧化有机物所需的金属氧化物修饰电极制备复杂的问题,以同步脱氮和除碳为目的,在A/O生物流化床硝化反硝化基础上,联合电解产氢构建自养反硝化和异养反硝化协同作用的体系,脱氮的同时将有机污染物作为异养反硝化碳源加以降解。以模拟焦化废水为研究对象,分别考察反应器脱氮和除碳的运行效果,分析环境温度、电流强度、特定电解质工况条件对脱氮与除碳协同作用的影响。结果表明,与常规生物流化床相比,(22±1)℃,电流强度10 mA时,NO3--N去除率从24%提高到69%,去除速率为9.16mg/(L.h),COD去除速率从31.5 mg/(L.h)提高到66 mg/(L.h);Cu2+本身对反硝化存在促进作用;电流强度10 mA,添加Cu2+使反硝化效果进一步提高,NO3--N去除率达到90%以上,此时苯酚、喹啉与芘的去除速率分别达到15.0、3.1、0.25 mg/(L.h),和NO3--N去除规律呈现一致性。研究过程证明了在微电流和Cu2+强化作用下,电化学生物流化床具备同步脱氮和除碳的功能。 For the autotrophic denitrifieation capacity ofbiofilm-electrode process is limited and the complex preparation of the modified electrode by the metal oxide participated in the electrochemical oxidation of organic matter, the synergy system of autotrophic denitrification and heterotrophic denitrification with electrolysis hydrogen production was established, on the basis of the A/O biological fluidized bed nitrification and denitrification, for the purpose of simultaneous removal of nitrogen and carbon. The organic pollutants as carbon source for heterotrophic denitrification were degraded during the process of denitrification. For the study of the simulated coking wastewater, the effect of ambient temperature, current strength, and specific electrolyte working conditions on the reactor synergy denitrification and carbon removal was investigated. The results showed that： comparing with the conventional biological fluidized bed, on the condition of（22±1） ℃ and 10 mA current intensity,NO;-N removal ratio increased from 24% to 69% with the removal rate of 9.16 mg/（L-h）, and the COD removal rate was raised from 31.5 mg/（L .h） to 66 mg/（L .h）; adding Cu^2＋ led to further improvement on the effect of denitrification with the current strength of 10 mA. NO3-N removal rate was more than 90%, while the removal rate of the phenol, quinoline, and pyrene were 15.0 mg/（L .h）, 3.1 mg/（L .h） and 0.25 mg/（L .h）, respectively, which is consistent with NO;-N removal law. The study proved that with the strengthening of micro-current and Cu^2＋, electrochemical biological fluidized bed is capable of simultaneous denitrification and carbon removal.

关 键 词： 电化学生物流化床 自养反硝化 异养反硝化 难降解有机物

领　　域： [环境科学与工程]