溶解氧对电极生物膜反硝化性能的影响

为确定溶解氧对电极生物膜反硝化性能的影响,设计并运行了一套"电解-电极生物膜反应器"(ER&BER),研究电化学反应器(ER)的电解电流强度对电极生物膜反应器(BER)进水溶解氧(DO)质量浓度及反应器内DO质量浓度梯度的影响.结果表明,电化学反应和微生物的呼吸共同影响BER中DO的消耗.分别单独改变和连续改变ER系统...

Influences of dissolved oxygen on denitrification abilities of biofilm-electrode system

To study the influences of dissolved oxygen(DO) on denitrification ability of biofilm-electrode,a system consisting of electrolysis reactor and biofilm-electrode reactor was fabricated.The effects of electrolysis current of electrolysis reactor system on the DO content in influents and the DO grads in biofilm-electrode reactor were investigated.Results implied that both microbe respiration and electrochemistry had effects on DO consumption in biofilm-electrode reactor system.The DO,the removal of nitrate-N and the nitrite-N in the biofilm-electrode system were measured when the current in the electrolysis reactor was applied in continuous and batch changes.Although the DO in cathodes area had a little increasing with the increasing of DO in influent,the DO values were all below 2 mg/L.No evidence proves the influences of DO on nitrate removal but the negative influences might be obtained on nitrite accumulation.Some changes on microbial species of bio-film electrode were found at different DO concentrations by transmission electron microscopy micrographs.