A kind of soybean product sewage treatment method and system

Abstract

The invention discloses a soybean product sewage treatment method. The soybean product sewage is filtered with a filter grid, suspended solids and floating objects are transported outside; the filtered sewage is taken for primary precipitation; the upper layer liquid is taken and a pH regulator is added; Then the liquid is sent to the anaerobic reaction tank for reaction; the reacted liquid is filtered to remove scum, and then sent to the biological contact oxidation reaction tank for reaction; the reacted liquid is taken for flocculation and precipitation, and it is left to stand for stratification , the supernatant was drained out. The method of the invention has the advantages of efficient and stable treatment. The invention also discloses a system for treating soybean product sewage. The system of the invention includes a sewage pretreatment device, a primary sedimentation tank, a regulating tank, an anaerobic reaction tank, a filter tank, and a biological contact oxidation reaction tank connected sequentially through pipelines. , sedimentation tank, clear water tank. The system of the invention has a large amount of treated water, and is suitable for large soybean product processing enterprises and processing parks, and the treated water can be directly discharged into municipal sewage pipe networks.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a soybean product sewage treatment method and system. Background technique [0002] Sewage from soybean product processing mainly includes soybean soaking, soaking and pressing wastewater and flushing wastewater of raw soybeans, which mainly come from soybean washing water, soybean soaking water, pulp and residue separation water, press filtration water, washing water of various production process containers, Floor washing water, etc. The COD of yellow swill in sewage is as high as 20,000-30,000 mg / L, and the COD of soaked soybean water is 4,000-8,000 mg / L. This type of sewage has a high content of organic pollutants and is a high-concentration organic polluted wastewater that pollutes the environment. Since the production of soybean products belongs to the intermittent production mode, the drainage time is relatively concentrated, and the water volume and ...

AI Technical Summary

Problems solved by technology

This type of sewage has a high content of organic pollutants and is a high-concentration organic-polluted wastewater that pollutes the environment.

Since the production of soybean products belongs to the intermittent production mode, the drainage time is relatively concentrated, and the water volume and water quality are very uneven. In the process of sewage treatment in the existing technology, the treatment effect is easy to deteriorate and frequent maintenance is required.

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