Nitrifying bacterium agent for treating nitrite in aquaculture wastewater as well as preparation method and use method of nitrifying bacterium agent

The invention discloses a nitrifying bacterium agent for treating nitrite in aquaculture wastewater as well as a preparation method and a use method of the nitrifying bacterium agent, aiming at solving the problem that the nitrifying bacterium agent in the prior art has a relatively poor treatment effect on the nitrite in the aquaculture wastewater with a low carbon nitrogen ratio. According to the invention, an inorganic culture solution is utilized, continuous passage screening is carried out, an efficient and stable nitrifying bacterium agent is obtained, and the nitrifying bacterium agent is prepared from the following bacteria in percentage by weight: 76.70% of acinetobacter, 12.98% of CandidatusNitrotoga, 2.70% of methylated petroleum bacillus, 1.34% of pseudomonas, 1.28% of acidovorax, 0.87% of polar monomonas, 0.35% of flavobacterium, 0.32% of thermophilus, 0.28% of sphingomonas, 0.05% of Shinella and the like. And the catalyst can be used in a manner of direct addition or addition after immobilizatio