摘要
以海藻酸钙包埋脱氮硫杆菌制成的固定化微生物颗粒填充生物固定床,用以净化低浓度H2S废气。实验研究了温度、pH值、进气浓度及流速对反应体系中的H2S脱除率的影响,测定了生物固定床中代谢物的种类及其含量。结果表明当进气口的质量浓度低于6×10-5mg/L、25～40℃、pH值在6.0～7.5范围时,生物固定床对废气中H2S的脱除率可达90%以上,在反应过程中pH值保持不变;进气口的流速对不同浓度的H2S的影响较大,当进气口H2S质量浓度为3×10-5mg/L且流速在35L/h时,脱除率高达95%以上。元素硫作为主要产物防止了生物固定床的酸化,并保证脱硫装置的稳定性。
Thiobacillus denitrificans was immobilized with Ca-alginate to produce pellet packing materials for a packed column biological fixed bed that controlled hydrogen sulfide emission. The effects of operating parameters, such as temperature, pH value, inlet gas concentration and flow rate, on the removal efficiency were studied. The kinds and contents of metabolic products in the biological fixed bed were measured. The results showed that the optimal temperature and pH value required to remove hydrogen sulfide were 25-40°C and pH=6.0-7.5, correspondingly the hydrogen sulfide removal efficiency greater than 90% if inlet H2S concentration was below 6×10-5 mg/L, and pH value drop was insignificant in this fixed bed. The hydrogen sulfide removal efficiency was affected dramatically by the inlet gas concentration and flow rate. The biological fixed bed had a hydrogen sulfide removal efficiency remained above 95% when the inlet hydrogen sulfide concentration was below 3×10-5 mg/L at 35 L/h of flow rate. The element sulfur as a main product prevented acidification of the biological fixed bed, which maintained the stability of the operation.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2004年第2期30-32,34,共4页
Modern Chemical Industry
基金
西安交通大学行动计划环境学科重点建设项目(2000-1)
关键词
生物固定床
H2S
固定化细胞
脱氮硫杆菌
biological fixed bed
hydrogen sulfide
immobilized cell
Thiobacillus denitrificans
