Treatment method for soybean product processing wastewater

Abstract

The invention relates to a treatment method for soybean product processing wastewater. The method effectively solves the problems that the engineering investment is large, the operation cost is high,the operation is not convenient, excess sludge cannot be properly placed, and equipment produces secondary noise pollution. The method comprises the following steps: separating solid impurities of thewastewater through a grid, ensuring that the wastewater enters a wastewater regulating tank, so as to be stirred, meanwhile performing aeration, ensuring that the wastewater enters a first sedimentation tank, and removing a part of suspended solids; ensuring that the wastewater enters backflow pressurized air flotation machine, feeding a flocculating agent to remove suspended solids, ensuring that heavy suspended solids are precipitated at the bottom of a tank and the wastewater subjected to air flotation enters a UASB reactor, performing three-phase separation, ensuring that liquid phase enters an anoxic tank, so as to subjected to synchronous nitrification and denitrification, waste water enters a sedimentation tank, so as to be precipitated, sludge is pumped into a sludge concentratingtank, and clear water meeting a standard is discharged through a pipeline and recycled; concentrating the sludge pumped into the sludge concentrating tank, ensuring that liquid supernatant returns the regulating tank, so as to be recycled, and feeding the concentrated sludge into a plate-and-frame filter press, so as to be subjected to filter pressing. The method has the advantages of simple andreliable structure, high compactness in distribution, great convenience and simpleness, easiness in operation, low cost and good effect.

Description

technical field [0001] The invention relates to the technical field of food processing industry, in particular to a method for treating soybean product processing wastewater. Background technique [0002] Soybean production enterprises need to use a lot of water in the production process, such as cleaning soybeans, preparing soymilk, producing tofu, and cooking various soybean products will generate a large amount of waste water. The high concentration of freshwater compounds, proteins and fats in the waste water etc., there are also a small amount of edible oil, pepper, salt and food additives, etc. The characteristics of water quality are that the main pollutants are conventional pollutants, namely COD, BOD, SS and ammonia nitrogen and other pollutants. After mixing, the B / C ratio is 0.5. The biodegradability is high, and it belongs to the biodegradable sewage. The waste water does not contain antibiotics that affect the biochemical treatment. The amount and quality of the...

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Problems solved by technology

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for treating soybean product processing wastewater, which can effectively solve the problem of large project investment, high operating cost, inconvenient operation, and inability to properly arrange excess sludge. The problem of secondary noise pollution

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