气升式反应器中微生物对H_2S的脱除研究  

Bio-desulfurization in an Air-lift Reactor

作　　者：张学欢[1] 梁颖[1] 黄亚洁[1] 陈宁[1] 温皓程[1] 张永奎[1] 

机构地区：[1]四川大学化学工程学院,成都610065

出　　处：《应用与环境生物学报》2008年第3期413-415,共3页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(No.20576082)~~

摘　　要：筛选驯化得到具有高效脱硫性能的菌群，在气升式反应器中进行了H2S脱除实验研究．在温度为28℃、初始pH8．0的条件下考察了不同通气量对反应体系中H2S脱除能力、脱除效率的影响以及H2S进气负荷和通气量对SO4^2-生成率的影响．结果表明，最佳通气量为0．2L/min．在此通气量下，当H2S进气负荷为5．76kg·m^-3·d^-1时，脱除负荷可达5．62kg·m^-3·d^-1，而脱除率可以保持在97．8％以上；当H2S负荷为4．37～4．93kg·m^-3·d^-1时，H2S去除率可达到99％以上，且主要副产物为单质硫．通过增大进气负荷、降低通气量可以获得较高的单质硫回收率．The air-lift reactor with an effective volume of 0.40 L was used to study the capability of removing H2 S. The bacteria which were used to remove H2 S were isolated and cultured in our lab. Under the conditions of 28 ℃ and initial pH 8, the effects of different gas flows and different H2 S concentrations on the microbial desulfurization capacity and, efficiency of the reactor were investigated. The effects of H2 S input load and gas flows on the forming rate of sulfate were also investigated. The results showed that the optimum gas flow was 0.2 L/min. Under this condition, when the input load of H2S was 5.76 kg·m^-3·d^-1, the maximum elimination capacity was 5.62 kg·m^-3·d^-1, while the removal efficiency could still maintain more than 97. 8%. When the input load was 4.37 -4.93 kg·m^-3·d^-1, the removal efficiency of H2S could reach 99% , and the major product was sulfur. These data indicated that high recovery rate of sulfur can be acquired by increasing the input load of H2 S or decreasing the gas flow.

关 键 词：H2S 生物脱硫 气升式反应器 进气负荷 

分 类 号：X701[环境科学与工程—环境工程]