不同生物脱臭填料生物膜成长特性

Characteristic of Biofilms Forming in Different Biological Deodorizing Carriers

用活性炭、浮石、陶粒和瓷环分别作为生物滴滤填料进行去除H2S恶臭气体的对比研究。活性炭和浮石对高效脱臭菌有强的吸附和固定作用,挂膜时间短,生物含量高而陶粒和瓷环固定期长,成膜较晚。在循环液流量为24L/h,气流量为0.5m3/h,进气浓度在500mg/m3的条件下,活性炭、浮石、陶粒和瓷环的成熟生物膜对H2S的去除率分别为99%、98%、95%和93%,从成膜到发生严重堵塞的生物增量的最大值分别是19.7、70.5、68.9、90.3mg/cm3。试验对比结果表明,多孔浮石是优质的生物滴滤填料。

Comparison study on biological deodorizations of hydrogen sulfide (H_2S) was conducted by using activated carbon; pumice; ceramics pellet and ceramics ring as carrier in trickled-bed biofilter respectively. It was found that activated carbon and pumice had stronger abilities to adsorb and immobilize deodorization bacteria. Comparing with ceramics pellet and ceramics ring, they had higher microorganism adhesion capacity and a shorter biofilm forming time. At operational conditions of hydraulic flow rate of 24?L/h, inlet gas flow rate of 0.5?m^3/h, inlet gas concentration of 500?mg/m^3, removals for H_2S of formed biofilms in active carbon; pumice; ceramics pellet ceramics ring were 99%、98%、95%、93% respectively. The maximum increased biomass values were 19.7、70.5、68.9、90.3?mg/cm^3 from maturation to clogging the filter for these four types of carriers respectively. It was suggested that pumice was a promising candidate as a carrier of microorganisms in trickled-bed biofilter.