Air-floating pretreatment method and device for high-concentration organic sewage

Abstract

The invention discloses an air-float predisposing method of organic effluent, which comprises the following steps: blending organic effluent and sludge with high-activity anaerobe; decomposing organics in the effluent under 15-60 deg.c through microbe; generating bubble; making non-decomposed particle impurity attached by bubble float on the water level; forming scum; remaining effluent for 1-2h to drain. the device contains a reacting pond bulk with reacting area and separating area separated by baffle on the pond bottom, wherein the pond wall top on the reacting area side possesses draining pipe with inlet pipe and blow-down pipe on the bottom; the diversion cylinder is set in the reacting area with stirrer on the diversion cylinder; the outlet pipe is set on the top of pond wall on the separating area side; the notch is opened on the top of baffle with reflux hole near the bottom.

Description

technical field [0001] The invention relates to a method and equipment for sewage treatment, in particular to an air flotation water treatment method for organic sewage and a device for completing sewage treatment using the method. Background technique [0002] The treatment methods for organic sewage usually include basic methods such as physical separation, physical chemistry and biological treatment. Among them, physical separation mainly includes sedimentation, air flotation, ultrasonic, microwave, filtration and other processes; physical chemistry mainly includes mixing coagulation precipitation, electrolytic air flotation, chemical dosing, photocatalytic oxidation and other processes; biological treatment mainly includes aerobic treatment and anaerobic treatment. Generally speaking, the physical separation method has the problem of low effluent quality, and it is not easy to meet the requirements of sewage discharge, while the chemical dosing, photocatalytic oxidation ...

AI Technical Summary

Problems solved by technology

Its advantages are: simple equipment and easy operation; but its disadvantages are: large bubble size (diameter > 1 mm), fast rising speed, small specific surface area, and short contact time with pollutants

Its advantages are: low air dissolution pressure, saving power consumption and power equipment; disadvantages are: all equipment is in the sealed air flotation pool, which makes the structure of the air flotation pool complex; operation management and maintenance are inconvenient

The advantages are: wide range of pollutant removal, less sludge, simple process and less equipment; the disadvantage is: large power consumption

However, if the air flotation method is used, in addition to the aforementioned disadvantages, it is also difficult to remove the soluble organic matter such as sugars contained in it.

Images