Method for removing oil in domestic sewage

Abstract

The invention discloses a method for removing oil in domestic sewage. Waste water successively passes through a water collection well, a coarse screen, a primary settling tank, a pH value adjusting tank, a nano micropore ultrasonic intermittent polymerization reactive tank, a secondary settling tank, a high-voltage discharge organic rhodium catalytic polymerization reaction tank, a tertiary settling tank and a water purifying tank. By creatively utilizing a synergistic chemical effect of a specific frequency ultrasonic wave (25100 to 27800 Hz), organic matters in the waste water under the condition can be subjected to the breakage and rapid recombination of C-H bonds on the surface of a nano micropore membrane material, so that the polymerization occurs on the surface of a nano micropore surface polymer, when an ultrasonic catalytic reaction and a stirring process occur alternately, a molecular weight of the organic matter polymer can be continuously increased, the organic matter polymers can be gradually converged into large-particle insoluble substances so as to be separated from the surface of the nano micropore membrane material and dispersed in the waste water in a form of suspended solids, and finally the suspended solids can be removed by virtue of the settling process.

Description

technical field [0001] The invention relates to a domestic sewage degreasing method, which belongs to the field of waste water treatment in environmental protection. Background technique [0002] In domestic sewage, oily sewage is one of the main water bodies. Numerous restaurants, canteens, food processing enterprises and residents will discharge a large amount of sewage in their daily life, which contains a large amount of animal and vegetable oils. If it is not treated directly, it will cause blockage of pipelines, turbidity and corruption of water bodies, and breeding of diseases. source. [0003] At present, the existing domestic sewage degreasing methods include two kinds of chemical methods and physical methods. [0004] (1) The advantages of chemical treatment are low equipment cost, good treatment effect, and simple operation; the disadvantage is that it needs to continuously inject chemicals into the wastewater, which has high operating costs and will introduce s...

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Problems solved by technology

[0004] (1) The advantages of chemical treatment are low equipment cost, good treatment effect, and simple operation; the disadvantage is that it needs to continuously inject chemicals into the wastewater, which has high operating costs and will introduce secondary pollution

[0005] (2) Physical methods mainly include filtration separation method and air flotation separation method, but they are only suitable for separating oil products with large particles in wastewater, the treatment efficiency is 60-80%, and the oil content in effluent water is about 100-200 mg / Lift

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