Purification method and purification system of kitchen waste water

Abstract

The invention discloses a purification method and purification system of kitchen waste water. A discharge standard can be achieved by the purification treatment of the invention which has a stable process. The purification method comprises the following steps of: filtering kitchen waste water to remove suspended substances in the kitchen waste water, and then, separating oil-based substances from water-based substances; carrying out primary jet pressurization gas flotation treatment for 1.5-3 hours on the waste water after separation, filtering the waste water subjected to the primary jet pressurization gas flotation treatment by an overflow sand filter to remove floating slag and floating oil in the waste water, and then, removing precipitates by adopting a precipitation method; conveying the waste water into a pH value regulating tank to regulate the pH value to enable the water quality to meet requirements of biological treatment; conveying the waste water into an intermediate precipitation tank to precipitate the suspended substances in the waste water; then, carrying out aerobic treatment by adopting a biological rotating disk; and adding coagulants into the waste water after biological treatment for carrying out secondary jet pressurization gas flotation treatment, precipitating, removing the precipitates in the water, and discharging the waste water when the detection result shows that the discharge standard is achieved.

Description

technical field [0001] The invention relates to a purification method and a purification system of kitchen waste water. Background technique [0002] Kitchen wastewater comes from a variety of sources, including food processing. Among them: fish and meat, poultry and eggs, fruits and vegetables, dairy products, grains, soybean products, etc. are of various types, and the water quality of the discharged wastewater varies greatly. The main pollutants are: [0003] 1. Solid substances floating in wastewater, such as tea leaves, fruit peels, fish scales, minced meat, etc.; [0004] 2. Grease, protein, starch, colloid, etc. suspended in wastewater; [0005] 3. Grease, protein, starch, colloid, etc. dissolved in wastewater; [0006] 4. Sediment, etc. carried by raw materials; [0007] 5. Possible pathogenic bacteria, etc.; [0008] 6. Overtime slaughter contains a lot of blood, blood clots, hair fibers, undigested food, feces, etc. [0009] These wastewater from animals and ...

AI Technical Summary

Problems solved by technology

[0007] 5. Possible pathogenic bacteria, etc.;

[0010] 1. The amount of wastewater is large, although there will be no toxic pollutants, but the content of organic matter and suspended matter is high

[0011] 2. It is easy to be corrupted, causing eutrophication of the receiving water body, causing a large number of algae to multiply, and rapidly consuming dissolved oxygen in the water body

[0012] 3. Generate odor, deteriorate water quality, and affect the use value of water bodies

[0013] 4. Grease floating on the water surface, suspended substances, etc

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