Method for deoiling restaurant wastewater

Abstract

The invention discloses a method for deoiling restaurant wastewater. The method comprises: pumping restaurant wastewater contained in a wastewater collecting tank to a freezing tank; cooling restaurant wastewater contained in the freezing tank to 0-5 DEG C, pumping the restaurant wastewater which stands in the freezing tank to a suction filtration tank, and pumping the obtained restaurant wastewater to a biochemical tank via a pumping pipe and a third material pumping pipe; and adjusting the pH value of the restaurant wastewater in the biochemical tank to be 6-8, and adding aerobic microorganisms, the amount of which is 0.004-0.006 time that of the restaurant wastewater. The method is simple and reasonable in design. Liquid grease contained in the restaurant wastewater is removed through afreezing filtration method, and the content of animal and vegetable oil, COD and ammonia nitrogen in the restaurant wastewater is greatly reduced, thereby preventing the generation of drainage oil from the origin. The filtered restaurant wastewater is assimilated and degraded through aerobic microorganisms, so that the effluent standard is met. In the whole process, vacuum pumping is adopted, sothat peculiar smell diffusion of the restaurant wastewater is effectively prevented, and the surroundings are not affected. The employed equipment is simple, the treatment cost is low, and the methodhas great use and application value.

Description

technical field [0001] The invention belongs to the technical field of catering management, and specifically relates to a catering wastewater treatment technology, more specifically, a catering wastewater degreasing treatment method. Background technique [0002] Waste oil generally refers to all kinds of low-quality oils that exist in daily life, such as recycled cooking oil, repeatedly used frying oil, etc. The largest source of waste oil is the grease trap in the sewer of large urban hotels. Long-term consumption may cause cancer. The human body is extremely harmful. With the vigorous development of the catering industry, the discharge of catering wastewater is increasing day by day, and it has become an important source of urban sewage. Its discharge accounts for 3% of the urban wastewater discharge. The liquid oil is the main source of waste oil; [0003] How to eliminate gutter oil from the source is a technical problem that needs to be solved in this field. In the p...

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Problems solved by technology

[0003] How to eliminate gutter oil from the source is a technical problem that needs to be solved in this field. In the prior art, such as application number CN201310388664.5, a method for treating catering wastewater with a combination of aerobic microorganisms and ozone is disclosed. Catering wastewater uses aerobic microorganisms to degrade and treat catering wastewater. The amount of aerobic microorganisms is greatly increased, and during the treatment process, the odor cannot be effectively controlled and diffused, seriously affecting the surrounding environment, and the animal and vegetable oil content after treatment often reaches Waste oil cannot be eliminated at the source if the discharge standard is not met

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