Catering waste water oil-removing treatment method

Abstract

The invention discloses a catering waste water oil-removing treatment method. Waste water sequentially passes through a temporary storage pool, a coarse screen, a microbubble air floatation oil-absorption device, an oil catalyzing and weighting desorption reactor, a pH adjusting pool, a primary settling pool, an organic rhodium catalytic reaction tank, a biological denitrification pool, a secondary settling pool and a water purifying pool. According to the catering waste water oil-removing treatment method, the catalytic action of a pi-allyl nickel compound on oil molecules is creatively utilized, when oil in the waste water is adsorbed by modified diatomite at the temperature ranging from 200 DEG C to 250 DEG C, under catalysis of the pi-allyl nickel compound, transitory breaking of C-H bonds in the oil molecules can occur, C-C bonds or C-H bonds are rapidly formed through combination, the C-H bonds can be broken again, the C-C bonds cannot be broken any more due to the fact that the catalytic action of the pi-allyl nickel compound is limited, and therefore the oil molecules with short carbon chains can be gradually synthesized into heavy oil molecules with longer carbon chains.

Description

technical field [0001] The invention relates to a treatment method for degreasing catering wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] Among domestic sewage, catering 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 catering wastewater degreasing methods include the following four. [0004] (1) 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...

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Problems solved by technology

[0005] (2) 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

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