[3,4-dichloroaniline--a nitrogen and carbon source for a mixed culture of microorganisms].

A mixed microbial culture assimilating 4-chloroaniline and 3,4-dichloroaniline as sole sources of carbon and nitrogen was isolated from soil treated with propanide for a long period of time. The process is accompanied with a 100% liberation of chloride ions. Aniline cannot serve as a growth substrate for the mixed culture. The authors have studied whether the mixed culture utilizing chloroanilines can decompose these compounds in model experiments with natural waters and soil suspensions. The culture actively decomposes 3,4-dichloroaniline (20 mg/litre) in natural water samples into which it has been added at a concentration of 10(3)--10(4) cells/ml. The decomposition is accelerated in experiments with suspensions of meadow-chernozem soils when cells of the mixed culture are added to the suspensions. The rate of 3,4-dichloroaniline degradation in a grey forest soil suspension remains nearly unchanged when the mixed culture is added to it. Degradation of the chloroaniline is accompanied with equivalent liberation of chloride ions when the mixed culture is added to natural water samples.