脱氮硫杆菌对废水中硫氮的脱除.pdf

2013-02-25 DOI: . /
应用与环境生物学报 Chin J Appl Environ Biol 2013,19 ( 1 ) : 175-178
脱氮硫杆菌对废水中硫氮的脱除*
武鑫** 赵晋忠
(山西农业大学文理学院太谷 030801)
摘要为脱除废水中高浓度的硫氮,首先对脱氮硫杆菌(Thiobacillus denitrificans)的生长曲线和驯化期间营养液 pH
的变化进行了测定,确定了脱氮硫杆菌合适的使用条件. 然后检测了接菌后废水中的S2-浓度控制在400 mg/L时合适的
- 2-
硫氮比以及脱氮硫杆菌对NO3 的去除率. 结果表明,处理富含硫氮的废水时,当硫氮比控制在5:3、S 浓度控制在400
- 2-
mg/L时,脱氮硫杆菌对NO3 %,同时 S 转化成硫酸盐或可回收的单质硫,使废水的硫氮污染得到了
有效的控制. 图6 表1 参16
关键词脱氮硫杆菌;硝酸盐;硫氮废水;去除率
CLC X172
Removal of Nitrate and Sulfide from Wastewater byThiobacillus denitrificans*
WU Xin** & ZHAO Jinzhong
(College of Arts and Science, Shanxi Agriculture University, Taigu 030801, Taigu, China)
Abstract The growth curve of Thiobacillus denitrificans and pH of the culture media during the domestication process were
determined to make sure the optimum condition for the removal of nitrate and sulfide in highly-concentrated wastewater. Then
-
the ratio of sulfide to nitrate and the removing rate of NO3 were also examined in this paper. The results showed that when the
2- -
S concentration in wastewater was 400 mg/L and the ratio of sulfide to nitrate was 5:3, the removing rate of NO 3 could reach
%, and S2- could simultaneously be converted into sulfate or elementary sulfur. These results indicated that Thiobacillus
denitrificans had application potential in pollution control