摘要
本文对用硫作为电子供体,硝酸盐作为电子受体,由脱氮硫杆菌进行的自养反硝化过程的动力学模型进行了研究.结果表明,硝酸盐在滤料表面生物膜中的扩散过程对硫石灰石滤柱的反硝化动力学影响很大.若扩散速率慢,硝酸盐只能穿过生物膜的一部分,则滤柱的反硝化速率遵循1/2级反应动力学;若扩散速率快,硝酸盐能穿过整个生物膜,则滤柱的反硝化速率遵循零级反应动力学.
This paper discusses the kinetic model of autotrophic denitrification process in which sulphur is electronic donor and nitrate is electronic acceptor.'Results show that nitrate diffusion rate within biofilm exerts important influence on the denitrification kinetics of sulphur/limestone column. If the diffusion rate is very slow and nitrate can only partially penetrate biofilm, the denitrification rate of the column corresponds to 1/2 order kinetics. If the diffusion rate is very fast and nitrate can fully penetrate biofilm, the denitrification rate of the column corresponds to zero order kinetics.
出处
《环境化学》
CAS
CSCD
北大核心
1994年第5期439-447,共9页
Environmental Chemistry
关键词
硫
自养反硝化
动力学模型
硝酸盐
石灰石滤柱
sulphur, autotrophic denitrification , thiobacillus denitrificans, kinetics model,nitrate.
