Heterotrophs nitrobacteria, biosensor comprising heterotrophs nitrobacteria and method for detecting water body toxicity

The invention relates to the field of microorganism, and in particular relates to heterotrophs nitrobacteria, a biosensor comprising the heterotrophs nitrobacteria and a method for detecting water body toxicity. According to the heterotrophs nitrobacteria, i.e. Rhodococcus rhodochrous with the collection number of CGMCC (China General Microbiological Culture Collection) No.3890, Rhodococcus equi with the collection number of CGMCC (China General Microbiological Culture Collection) No.3901, Pseudomonas alcaligenes with the collection number of CGMCC (China General Microbiological Culture Collection) No.3902 and Micrococcus luteus with the collection number of CGMCC (China General Microbiological Culture Collection) No.3903. Four heterotrophs nitrobacteria obtained by screening with an in-situ multi-point sampling point are combined into a composite fungicide indicator. The composite fungicide indicator is fixed on a carrier to obtain the biosensor for detecting the water body toxicity. With the method for detecting the water body toxicity, the continuous on-line monitoring problem for biotoxicity detection is solved, and the water body toxicity is quickly detected so as to identify and monitor severe environment pollution event risk sources as well as detect the biotoxicity of the water body, such as drinking water, sewage, rivers, lakes and the like.