脱氮硫杆菌的脱硫特性及其处理恶臭物质硫化氢的应用

Characteristics of Thiobacillus denitrificans in desulfuration and its application in hydrogen sulfide removal

摘要:

污水和污泥的处理过程中会产生大量的恶臭气体硫化氢(H2S)。脱氮硫杆菌是氧化H2S和其他硫化物的重要的脱硫工程菌。本文阐述了脱氮硫杆菌的生物学特性和氧化H2S的两种途径。分析了反应体系中的硫化物负荷、硝酸盐和亚硝酸盐的浓度、氧含量以及pH值等因素对氧化效果、反应速率、氧化途径及产物形式的影响。介绍了脱氮硫杆菌在恶臭污染治理中的应用及其在同步处理含氮含硫恶臭物质方面的发展趋势。

Abstract:

High concentrations of hydrogen sulfide are generated during wastewater and sludge treatment processes. Thiobacillus denitrificans is an important desulfuration engineering bacterium capable of oxidizing hydrogen sulfide and other sulfides. The current article reviews the biological characteristics of Thiobacillus denitrificans and two pathways of hydrogen sulfide oxidization. Factors, e.g. sulfide load, nitrate or nitrite concentration, oxygen content and pH value, influencing oxidation efficiency, reaction velocity, pathway and form of products are summarized. The application of Thiobacillus denitrificans in odor removal is introduced and its potential use in simultaneous control of nitrogen- and sulfur-containing odor-causing substances is also discussed.