Anaerobic denitrification system of bioethanol wastewater

Abstract

An anaerobic denitrification system of bioethanol wastewater comprises an ethanol wastewater regulating tank, an AC anaerobic tank, an anaerobic denitrification tank, a precipitating tank, an oxidation ditch, a biofilter, a sludge tank, a flocculation reaction tank and a sheet frame deslimer, wherein the precipitating tank comprises a first precipitating tank, a second precipitating tank and a third precipitating tank; the oxidation ditch comprises a primary oxidation ditch and a secondary oxidation tank; the anaerobic denitrification tank and the primary oxidation ditch are connected in series for operating, and form a set of short-cut nitrification and denitrification+anaerobic ammonia oxidation system; anaerobic ammonia oxidation reaction of nitrite nitrogen and ammonia nitrogen is completed under an anaerobic state through reflux of a large amount of nitrite liquid generated through short-cut nitrification, and ammonia gas and water can be generated; other total nitrogen and ammonia nitrogen in the primary oxidation ditch can be synchronously removed by utilizing short-cut nitrification and denitrification reaction; residual ammonia nitrogen in the anaerobic denitrification tank can be continuously removed by entering an aerobiotic system. Through the treatment of the anaerobic denitrification system disclosed by the invention, the effluent index of wastewater is greatly increased, and national wastewater discharge standard can be reached; the operating efficiency is high, and the treatment means is stable and reliable.

Description

technical field [0001] The invention relates to a treatment system for ethanol wastewater, in particular to an anaerobic denitrification system for treating biological ethanol wastewater. Background technique [0002] At present, the production of bioethanol industry has problems such as high concentration of residual organic matter in wastewater, large environmental pollution caused by production, and difficulty in sewage treatment. Especially in recent years, the pressure of environmental protection has been high, and the problem of bioethanol wastewater treatment has become more prominent. Searched: [0003] Innovation Science and Technology 2014 (22)-89-8990 published a paper published by Sinopoly Tianguan Bioenergy Company: "Study on the Nitrogen Removal Effect of Orbal Oxidation Ditch in the Process of Treating Ethanol Wastewater" to improve the orbal oxidation ditch in the production workshop propose. [0004] Chinese patent CN103936239 discloses "an advanced treatm...

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Problems solved by technology

[0007] Aiming at the problems of high concentration of residual organic matter in the waste water of fermented ethanol in the prior art, great environmental pollution caused by production, and difficulty in sewage treatment, the present invention provides a short-range nitrification and denitrification tank that operates in series with an anaerobic denitrification tank and an oxidation ditch. +Efficient denitrification system of fermented ethanol wastewater by anaerobic ammonium oxidation process

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