Citrobacter, application of citrobacter in treatment of sulphate-containing waste water, and separation and identification method of citrobacter

The invention discloses citrobacter, application of the citrobacter in treatment of sulphate-containing waste water, and a separation and identification method of the citrobacter. The citrobacter hasa sulphate reduction capability; the number of the citrobacter is Citrobacter sp.EPS8; the citrobacter is preserved in the Guangdong microbial strain preservation centre on July 13th, 2020; the preservation address is Floor 5, Building 59, Courtyard 100, Xianlie Middle Road, Guangzhou City, Guangdong Province; and the preservation number is GDMCC NO:61090. The strain can take lactic acid as a carbon source, and can reduce sulphate (the reduction rate is 100%) under an anaerobic condition; the strain has relatively strong sulphate reducing capacity within the initial pH value of 6-8; and the optimal initial pH value of the strain is 6.0. The citrobacter disclosed by the invention is facultative anaerobic bacteria, is rapid in aerobic growth, easy to culture and capable of anaerobically reducing sulphate, and has wi