【摘要】 氨氮是一种新进入水体的污染物,其超标率最大,严重污染环境。对低C/N比氨氮废水,传统生物技术需额外投加有机物作为电子供体进行脱氮,导致出水残留有机物。新研制的三维电极-生物膜反应器将电化学技术与生物膜技术相结合,将生物膜负载在三维电极体系表面,利用电化学作用产生的氢气和二氧化碳为微生物脱氮提供电子供体和碳源。长期稳定运行表明,新研制的三维电极-生物膜反应器中氨氮的转化率为95.8%,TN去除率为82%,出水基本无亚硝氮积累,每去除1 kg TN所需能耗小于5.9 kW·h。实验结果表明,该装置在脱氮过程中无需额外投加有机物和碳源,废水处理效率高、能耗低。更多还原

【Abstract】 As a new contamination in water,ammonia is polluting environment. According to suggestions on the formulation of " the 12 th Five-Year Plan" by the Central Committee of Chinese Communist Party,the gross ammonia must be controlled. During treating low C /N ammonia wastewater with traditional microorganism technology,organic donor is needed and organic remains in effluent. A novel biofilm-electrode reactor which combines electrochemistry and biofilm technology was designed to treat low C /N ammonia wastewater. In the reactor,biofilm grows on threedimensional electrodes which provide carbon source and electron donor by electrolysis. Ammonia wastewater can be treated effectively with nitrifying and denitrifying,simultaneously. Transformation efficiency of ammonia is 95. 8%,removal rate of TN is 82%,and no nitrite accumulates in effluent. The results show that the reactor is high efficiency and low energy consumption.更多还原