固定化微生物处理含H_2S气体的试验研究

Experimental Study on the Treatment of Odor Gas Containing Hydrogen Sulfide by Immobilized Microorganisms *

研究海藻酸钠包理固定化微生物颗粒填充床去除气相Ｈ２Ｓ的过程，活性微生物为经Ｓ２－加富驯化的污水厂污泥．填充滴滤塔运行实验表明，除Ｈ２Ｓ外适宜的ｐＨ值和喷淋率分别为１．８—４．０和＞０．１７ｍ３／（ｍ３·ｄ）；最大有效（去除率＞９６％）Ｈ２Ｓ体积负荷为６０００—６５００ｇ／（ｍ３·ｄ）；超过此负荷运行造成的气流阻力上升和去除率下降可通过反冲洗与低负荷（＜２０００ｇ／（ｍ３·ｄ），４ｄ）运行恢复；停气１２ｈ再启动去除率恢复时间＜２６ｈ．

The paper describes a removal process for hydrogen sulfide in a packed bed of the immobilized microorganism beads.The activated microorganisms,come from the S 2- enrichment culture and training sewage sludge,are immobilized in calcium alginate beads.The experimental results in the packed trickling column show that the appropriate pH value and spray ratio of H 2S removal are between 1 8 and 4 0 and more than 0 17m 3/(m 3·d) respectively.The maximum effective volume load of H 2S (removal efficiency>96%) is in the range from 6000 to 6500 g/(m 3·d).When the running load is higher than the maximum effective volume load,the gas flow resistance through the packed trickling column will increase and the H 2S removal efficiency will decrease.The above mentioned malfunction running condition can be recovered by a back washing and low running load(<2000g/(m 3·d)) process,the recovery period is 4 days.After stopping gas flow containing hydrogen sulfide for 12 hours and start up again,the period of the system removal efficiency recovery is less than 26 hours.