摘要
致臭的含硫化合物,尤其是二甲基硫化物的生物处理去除率较低。通过分离鉴定或悬浮、附着生长培养等手段,发现能降解气相硫化物的主要是化能自养型和甲基营养型的微生物,它们能将硫化物定量地氧化为SO_4^(2-)和CO_2。大部分能降解甲基硫化物的微生物,其适宜pH为中性。甲硫醇和硫化氢是二甲基硫代谢的中间体,参与二甲基硫代谢的酶系统不稳定,是处理效果不佳的主要原因。利用纯细胞接种,可有效地提高生物过滤器的脱臭效果,今后可从高效菌选育和固定化方式的改进等方面,进一步提高气相含硫恶臭物的生物处理效果。
The microbiological deodorization efficiency for odorous sulfur compounds, especially for dimethyl sulfide, is relatively low. On the bases of isolation and identification and with the help of batch or continuous suspended-growth and attach-growth culture, the microorganisms being able to degrade gaseous sulfide are mainly methylotrophy and chemoautotrophy which can oxidize sulfide to sulfate and carbon dioxide quantitatively. The optimal pH value of the great part of the microoganisms degrading methyl sulfide is neutral. Methyl mercaptan and hydrogen sulfide are the intermediate from the microbic metabolism of dimethylsulfide. The main reason resulting in inefficient microbiological deodorization of dimethylsulfide is the instability of the enzyme system participating in this metabolism. With inoculation of the true cells, efficient deodorization in a biological filter can be realized. Through selective culture of high efficiency microoganisms and modification of the technology about immobilized microoganisms, the efficient microbiological deodorization for sulfide can be expected.
出处
《上海环境科学》
CSCD
1998年第6期12-16,共5页
Shanghai Environmental Sciences
基金
国家自然科学基金项目
编号59508006
关键词
硫化合物
恶臭
臭气治理
生物处理
大气污染
Sulfide Malodour Odour treatment Biological treatment Metabolic mechanism Application
