A device for treating and recycling catering wastewater

Abstract

The invention discloses an apparatus for treating and recycling restaurant wastewater. The apparatus includes a wastewater storage tank, a decolouring treatment kettle, a wastewater treatment kettle and an acid-base reaction vessel. The bottom of the wastewater storage tank is connected to an inlet of a centrifugal pump via a pipe, the outlet of the centrifugal pump is connected to a centrifuge through a pipe, and a liquid outlet of the centrifuge is connected to a container formed in the ground via a pipe. The apparatus is reasonably designed, and restaurant wastewater undergoes filtering anddecolouring, so that a large part of animal and vegetable oil in the restaurant wastewater is separated from wastewater and collected. Through a distillation layering method, a small amount of animaland vegetable oil left in the restaurant wastewater is separated from wastewater and is collected. The wastewater undergoes simple treatment to meet the effluent standard. The treatment difficulty and cost of restaurant wastewater are effectively reduced. At the same time, the collected animal and vegetable oil is pickled, and liquid alkali is used for a reaction to prepare sodium high fatty acid, which is the main raw material for soap production. The waste turns into wealth, and the apparatus has great eco-friendly and economic benefit.

Description

technical field [0001] The technical field of catering management of the present invention specifically relates to a treatment process of catering wastewater, more specifically a device for treating and recycling catering wastewater. 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...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a device for the treatment and recycling of catering wastewater. After the catering wastewater is filtered and decolorized, most of the animal and vegetable oils in it are collected after being separated from the wastewater. The method of distillation and stratification separates the remaining small amount of animal and vegetable oils in the catering wastewater from the wastewater and collects them, which solves the problem of high cost of catering wastewater treatment and difficulty in meeting the discharge standards. After the collected animal and vegetable oils are pickled, Using liquid caustic soda to react to produce high-grade fatty acid sodium, the main raw material for soap production, waste utilization, has very good environmental protection and economic benefits

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