Coal chemical waste water biochemical nitrogen removal technology

Abstract

The invention discloses a coal chemical waste water biochemical nitrogen removal technology. The technology is based on a special-purpose treatment device. The special-purpose treatment device comprises a catalytic oxidation pool, an oxidation stabilization pool, a post biochemical BAF pool, a clear water pool, a dilution integrated tank, a pretreatment first-level BAF pool, a pretreatment second-level BAF pool and a water outlet pool. The catalytic oxidation pool, the oxidation stabilization pool, the post biochemical BAF pool and the clear water pool are orderly connected through rear section transmission pipes. The lower and upper parts of an aerobic tank in the post biochemical BAF pool are respectively provided with a lower sieve plate and an upper sieve plate. The lower sieve plate, the upper sieve plate and sides of the aerobic tank form an aerobic chamber. Several aerobic active sludge particles and several second masson pines as fillers are arranged in the aerobic chamber. A part of the several aerobic active sludge particles are located on the surfaces of the second masson pines. A macromolecular refractory organic matter is oxidized to form a micromolecular easily degradative organic matter so that treated water biochemical properties are improved.

Description

technical field [0001] The invention relates to a biochemical denitrification process for coal chemical wastewater, belonging to the technical field of wastewater treatment. Background technique [0002] Most coal gasification plants in China adopt the Lurgi gas production process. The waste water pollutants produced by this process have a high concentration and complex organic components, mainly including phenolic compounds, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur. Compounds and fatty compounds are highly toxic and difficult to biodegrade. If the coal-to-gas wastewater is not properly treated and discharged beyond the standard, it will cause serious pollution to the ecological environment. Therefore, how to effectively treat the coal-to-gas wastewater and achieve wastewater discharge standards has become an international problem. [0003] At present, high concentrations of ammonia nitrogen and phenol are the focus a...

AI Technical Summary

Problems solved by technology

At present, most of the research on coal gasification wastewater treatment technology stays in the small-scale experimental stage. Most scholars are only conducting research on the application of a single technology, and there are few studies on the coupling process of physicochemical treatment and biochemical treatment.

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