Research on Domestic Sewage Treatment by Mixed Psychrotrophs Strains at Low Temperature

摘要：

In this paper, psychrotrophs and psychrotrophilic yeast that had higher biological activity and metabolize ability of organic pollutants were isolated from activated sludge in winter by microbiology technique. Observation of morphologic and cultivate characteristic, analysis of physiological biochemical characteristics and generation time were tested. On the base of it, the ability of organic pollutants of single psychrotrophs and mixed psychrotrophilic strains were tested in low temperature sewage. The results showed that 6 kinds of psychrotrophs belong to Flavobacterium, Pseudomonas, Bacillus and 4 kinds of psychrotrophilic yeast belong to Candida, Rhodotorula, Saccharomyces etc. were screened and isolated. Psychrotrophs had shorter generation time as 9.04-13.11h at 5℃.The highest COD removal rate of single psychrotrophs and psychrotrophilic yeast was 64％ and 83％. The mixed psychrotrophs strains that had been domesticated presented high capacity of degrading organic pollutants in low temperature domestic sewage. The COD removal rate of mixed psychrotrophilic strains could reach to 83％-87％.

关键词： low-temperature sewage mixed psychrotrophilic strains psychrotrophs psychrotrophilic yeast

作者: MA Wencheng HAN Hongjun WANG Wei ZHONG Dan JIANG Dan JIA Yinchuan

作者单位: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China

会议类型: 国际会议

会议名称: 2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-11-13（万方平台首次上网日期，不代表论文的发表时间）