Method and system for biologically treating restaurant and kitchen garbage at high speed

Abstract

The invention relates to a method for treating restaurant and kitchen garbage (commonly known as swill) produced by restaurants and dining halls and high-concentration organic sewage produced in the industrial and agricultural production process. A method for biologically treating the restaurant and kitchen garbage at a high speed comprises the following steps of: pretreating the restaurant and kitchen garbage or the high-concentration organic sewage, removing grease, and performing primary hydrolysis acidification; and performing anaerobic digestion at an ultrahigh temperature by using at least three stages of anaerobic digestion reactors. A system for biologically treating the restaurant and kitchen garbage at the high speed consists of three or more stages of anaerobic digestion reactors; and system engineering has a buried design, and the reactors are arranged underground. By the method and the system for biologically treating the restaurant and kitchen garbage at the high speed, an ultrahigh temperature multi-stage anaerobic digestion process is adopted, the engineering has a buried and tight design, the structure is simple, investment is small, the occupied space is small, the garbage biological treatment effect is good, and good social and economic benefits are achieved during implementation and popularization.

Description

technical field [0001] The invention relates to the treatment of kitchen waste (commonly known as swill) produced in restaurants and canteens and high-concentration organic sewage produced in industrial and agricultural production processes, in particular to a high-speed biological treatment method and system for kitchen waste. Background technique [0002] At present, urban kitchen waste is the source of gutter oil and garbage pigs. These wastes enter people's dining tables through various channels, seriously endangering the health of the people. According to reports, restaurants and canteens in Zhengzhou City produce about 500 tons of leftovers and kitchen waste every day, and the kitchen waste in the sewage discharged from restaurants and canteens is estimated to be as high as 700-800 tons; Garbage generation has reached 60 million tons. The impact of kitchen waste and waste oil on food safety has attracted great attention from the central government and local government...

AI Technical Summary

Problems solved by technology

[0003] However, the "Xining Model" has the following "congenital" deficiencies: 1. The utilization rate of food waste is low, and the processing cost is high. Enterprises that process one ton of food waste will lose more than 150 yuan

Preparing to build a food waste treatment plant requires a large investment, high processing costs, and low utilization value of food waste. The waste water generated during the treatment needs to be treated up to the standard. The solid content of food waste is 10-12%, and a large amount of sewage needs to be treated, which adds a lot of treatment. costs; in addition, food waste is likely to cause secondary pollution during the collection, transportation, treatment, and sewage discharge process

2. The coverage rate of food waste treatment is low. It can only deal with leftover food waste from restaurants and canteens, but not the food waste in the sewage discharged from restaurants and canteens. It cannot completely block the loopholes of waste oil and garbage pigs

However, the construction of a waste biological treatment plant requires an investment of hundreds of millions of yuan, which raises the entry threshold for large-scale waste biological treatment and greatly inhibits the promotion and application of waste biological treatment technology

Images