Method for sewage treatment during refined cotton production and odor control in sewage treatment

Abstract

The invention discloses a method for sewage treatment during refined cotton production and odor control in sewage treatment. The sewage treatment process comprises the steps of: A. biosorption and facultative hydrolysis; B. vapor floating; C. first deposition; D. second deposition; E. aerobic biological contact oxidation; F. third deposition; and G. variable water level isokinetic sand filtration. The odor control method comprises: reacting H2S gas in odor with NaOH in an alkaline waste liquid so as to generate Na2S and water, thus reaching deodorizing effect. The method of the invention has good sewage treatment effect and a COD (chemical oxygen demand) removal rate up to over 70%, and the finally treated water can completely reach national emission standards. With very ideal odor control effect, the method in the invention has no need for high tower, less equipment investment, and low odor control cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and odor control, and more specifically relates to a method for treating sewage in the production process of refined cotton and controlling odor in pollution control. Background technique [0002] As people's requirements for the environment are getting higher and higher, industrial sewage must undergo strict treatment, and can only be discharged after reaching the standard. The current sewage treatment effect is not ideal, and the quality of the treated sewage is difficult to guarantee. It is inevitable to produce a large amount of malodorous gas containing hydrogen sulfide. If this gas is not treated, it will not only pollute the air environment, but also affect human health. At present, the treatment methods commonly adopted by people are: one is to adopt the method of blocking, that is, to use a large-scale cover net to cover the place where the odor will be generated, so that the gas...

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Problems solved by technology

[0002] As people's requirements for the environment are getting higher and higher, industrial sewage must undergo strict treatment, and can only be discharged after reaching the standard. The current sewage treatment effect is not ideal, and the quality of the treated sewage is difficult to guarantee. It is inevitable to produce a large amount of malodorous gas containing hydrogen sulfide. If this gas is not treated, it will not only pollute the air environment, but also affect human health

At present, the treatment methods commonly adopted by people are: one is to adopt the method of blocking, that is, to use a large-scale cover net to cover the place where the odor will be generated, so that the gas will not leak out, but no matter how the sealing measures are taken , the odor is still difficult to control; the second is to use the spray method, that is, to transport the odor gas to the high tower, and then spray the odor gas with the prepared medicament, and use the acid-base neutralization method to treat the sewage and control the odor In this way, on the one hand, the investment in equipment is very high, on the other hand, the cost of preparing spray liquid is relatively high, not only the cost of sewage and odor treatment is high, but also because the odor gas containing hydrogen sulfide is difficult to Compatible with pharmaceuticals, the treatment effect is not ideal

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