BAF处理生活污水过程中同步去除H2S的试验研究

采用曝气生物滤池处理生活污水的过程中，以混和臭气的空气为气源，以掺入了陶粒和铁炭颗粒的复合填料为载体，研究了反应器的运行条件和参数，结果表明，以混合臭气的空气作为气源对污水处理过程的需氧量基本无影响。当反应器的进气量为40 L/h，进水容积负荷和进气H2S的浓度分别在0.3～1.6 kg COD/(m3·d)和0.8～2.3 mg/m3之间变化时，可以实现出气和出水中H2S和COD分别小于0.04 mg/m3和90 mg/L，满足同时达标排放的要求。H2S的同步去除可能是通过微生物的氧化分解和形成FeS沉淀来实现的。

Study on simultaneous removal of H2S by biological aerated filter in the course of domestic sewerage treatment

The simultaneous removal of H2S was investigated by the biological aerated filter (BAF) reactor during domestic sewerage treatment. In the reactor, air of mixed odor, ceramic and iron/carbon granules were used as gas sources and carrier respectively. The operation condition and the technological parameter of the BAF reactor were discussed. The results showed that it was little effect on the oxygen demand of sewerage treatment when air of mixed odor was used as gas sources. When the air flow rate, volume loadings and inflow H2S concentration were 40 L/h, 0.3～1.6 kg COD/(m3·d) and 0.8～2.3 mg/m3 respectively, the H2S concentration of leaving air and effluent COD were lower than 0.04 mg/m3 and 90 mg/L respectively. Their values could reach demand of the discharge standard simultaneously. The removal of H2S was probably through oxidative decomposition of microorganism and the formation of FeS precipitate.