The present invention discloses a strain of Ochrobactrum J-22 that can simultaneously achieve denitrification and heavy metal removal in water, belonging to the field of microbial technology. The ochrobactrum J-22 is preserved in China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC NO.27416, the preservation date is May 23, 2023, and the preservation address is Beijing, China. The Ochrobactrum J-22 screened by the present invention can realize denitrification of water in the presence of a variety of heavy metals. Meanwhile, Hg (II) can be converted into mercury vapor to remove Hg (II) in the water body, and Cd (II) and Cr (VI) can be adsorbed to remove Cd (II) and Cr (VI) in the water body. The method has the advantages of being capable of removing various pollutants at the same time, simple to operate, low in cost and the like, and has good application prospects in the aspect of treatment of nutrient salt-heavy metal composite polluted wastewater.
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