Isolation screen and application of highly-effective cyanide-degrading fungus
Received date: 2005-02-10
Online published: 2010-10-01
Three highly effective cyanide-degrading fungus are isolated from electroplating wastewater, cyanide-contaminated soil and liquid in plating bath. The cyanide-degrading conditions of strain Fw as investigated. The results show that the optimum cyanide-degrading conditions are as follows: temperature 20-30℃,pH 5-7, rotating rate 100-180 r/min,inoculum 6%-20%. Under the optimum cyanide-degrading conditions, the CN-degradation rate of strain Fw is above 95%, the residual CN- concentration is less than 1 mg/L. Strain Fw can utilize CN- as carbon source and nitrogen source. When no other carbon and nitrogen sources are added in the medium, the residual CN- is 0.25 mg/L and 0.49 mg/L, meeting the requirement of 1st grade discharge standard. Some new bases for the problems of how to use highly effective fungus to treat cyanide-containing wastewater have been obtained.
Ji Junyuan, Wang Xiangdong, Li Fude, Zeng Yuan, Qiao Yong . Isolation screen and application of highly-effective cyanide-degrading fungus[J]. Industrial Water Treatment, 2005 , 25(7) : 35 -37 . DOI: 10.11894/1005-829x.2005.25(7).35
[1] Atsushi W, et al.Cyanide hydrolysis in a cyanide-degrading bacterium, Pseudomonas stutzeri AK61, by cyanidase[J].Microbiology, 1998, 144:1677-1682
[2] Alain D, et al.Cyanide degradation under alkaline conditions by a strain of fusarium solani isolated from contaminated soils[J].Appl.Environ.Microbiol., 1997, 63(7):2729-2734
[3] Kao C M, et al.Biotransformation of cyanide to methane and ammonia by Klebsiella oxytoca[J].Chemosphere, 2003, 50:1055-1061
[4] 国家环保局, 水和废水监测分析方法[M].第4版.北京:中国环境科学出版社, 2002.169-152
[5] 李军, 等.微生物与水处理工程[M].北京:化学工业出版社, 2002.134
[6] Stephen E.Biological degradation of cyanide compounds[J].Current Opinion in Biotechnology, 2004, 15:1-6
/
〈 | 〉 |