摘要
研究了pH对生物滤池处理含H2S和NH3混合恶臭气体的影响,以及不同pH下的物质转化情况和去除机制。结果表明,不同pH下,生物滤池对H2S和NH3的去除率是不同的。在强酸性(pH为2左右)和中性(pH为7左右)条件下,H2S均有较好的去除效果,这分别归于嗜酸性硫细菌和非嗜酸性硫细菌的生物降解作用。低pH下,NH3的去除归于化学中和作用;中性(pH为7左右)条件下,NH3有较高的去除率,主要依靠生物硝化作用。通过考察pH对生物滤池处理效果的影响,确定了生物滤池处理含H2S和NH3混合恶臭气体的pH控制条件和去除机制,为恶臭气体生物处理工艺的选择提供依据。
Batch treatment of H2S and NH3 containing odorous gases in self-made biofilter was performed to determine the effect of pH on performance of the biofilter.The substance transformations of H2S and NH3 in the biofilter and microbial characteristics were investigated.Results showed that the feed pH had the great influence on H2S and NH3 removal efficiency,H2S can be efficiently removed both at strong acid （pH=2） and neutral （pH=7） conditions,which were attributed to the biodegration of Acidophilic thiobacilli and Non-acidophilic thiobacilli respectively.NH3 was removed by the chemical neutralization at low pH value,while nitration played an important role in NH3 removal under the neutral pH condition.The suitable pH condition and microbe degradation mechanisms of biofilter for H2S and NH3 removal were obtained in this research,which could provide reference for process choices of odor control.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2010年第9期1-4,8,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.50908009)
北京建筑工程学院博士科研启动基金资助项目(No.100900502)
