Nitrite degradation of a Pseudomonas sp. strain SF1 and its applicaiton in fish pond sediment

A strain of Pseudomonas sp.,named as SF1,which showed high capacity of nitrite degradation,was screened from the mud of marine culturing pond.SF1 nitrite-degrading property and its application in fish pond sediment were carried out under lab environment.SF1 showed a high ability to degrade sodium nitrite at the fol-lowing conditions,1~1000 mg/L of sodium nitrite concentrate,10% of denitrifying bacteria inoculums,median aerating during fermentation;pH ranging between 6.5-8.0,and 12~36 h of fermentation time.Introducing SF1 fer-mentation broth(A value 0.36) into fish pond sediment at the ratio of 10% removed 67% of nitrite after 36 h.Our results indicate that SF1 can be used to treat fish pond sediment.