Method for processing coal mine acid wastewater through sulfate reducing bacteria and spontaneous combustion coal gangue in synergetic manner

Abstract

The invention discloses a method for processing coal mine acid wastewater through sulfate reducing bacteria and spontaneous combustion coal gangue in a synergetic manner. The method includes the following steps that bottom mud in an oxygen-deficient or locally-oxygen-deficient environment is taken and inoculated in an enrichment culture solution, after the bottom mud is subjected to oscillation culture at the temperature being 32 DEG C at the speed being 150 r/min for 2 weeks, a culture medium becomes black, a bottle opening has the smell of rotten eggs, and a liquid culture medium containing SRB is obtained; the spontaneous combustion coal gangue with the grain size ranging from 30 mesh to 120 mesh is taken and rinsed with distilled water three times, the spontaneous combustion coal gangue is dried at the temperature being 60 DEG C for standby application after surface dust is removed; the liquid culture medium containing the SRB and the spontaneous combustion coal gangue are placed in a reactor in proportion and are placed in a biochemical incubator with the temperature being 32 DEG C to be cultivated for 1 week after being mixed, and implantation growth of the SRB is achieved; and the coal mine acid wastewater containing Fe2+ and Mn2+ is injected, and purification treatment of the wastewater is conducted. The coal mine acid wastewater containing the Fe2+ and the Mn2+ is treated through the sulfate reducing bacteria and the spontaneous combustion coal gangue in the synergetic manner, waste in mining areas and microorganisms are combined and used for solving the problem of coal mine acid wastewater pollution, and the aim of treating waste through waste is achieved.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a method for treating coal mine acidic waste water with sulfate-reducing bacteria in cooperation with spontaneously combusted coal gangue. Background technique [0002] Sulfate-reducing bacteria (SRB) is a kind of prokaryotic microorganisms living in anaerobic environment. It uses electron transport chain to transfer electrons to high-valence sulfur such as sulfate as electron acceptor, and These substances are reduced to S 2- , so the use of SRB can effectively control sulfate pollution. Coal gangue is the waste produced in the process of coal mining and coal washing, and its emissions account for a large proportion of coal production. substances, polycyclic aromatic hydrocarbons, etc. Fuxin, Liaoning is rich in coal gangue resources. After long-term accumulation, coal gangue spontaneously combusts to form spontaneous combustion coal gangue with good phase properties. Aft...

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Problems solved by technology

[0004] The object of the present invention provides a kind of sulfate-reducing bacteria cooperative spontaneous combustion coal gangue treatment containing Fe 2+ , Mn 2+ The method of coal mine acid wastewater uses sulfate reducing bacteria to cooperate with spontaneous combustion coal gangue to treat coal mine acid wastewater, and combines the waste in the mining area with microorganisms to solve the problem of coal mine acid wastewater pollution, so as to achieve the purpose of treating waste with waste

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