Kitchen waste resource utilization method

Abstract

The invention belongs to the technical field of resource environments, and particularly relates to a kitchen waste resource utilization method. The method comprises the steps that dehydrating and degreasing are carried out on kitchen waste; magnetic separation is carried out on the kitchen waste, and metal impurities are removed; then the solid-phase kitchen waste subjected to metal impurity removal is crushed into uniform fine powder particulate matter; the thickening treatment is carried out on the fine powder particulate matter; the fine powder particulate matter subjected to the thickeningtreatment is injected from a high-permeability oil reservoir water injection well into a water well; the liquid-phase grease-containing free water is heated to 50-60 DEG C and is injected from the high-permeability oil reservoir water injection well; and the high-permeability oil reservoir water injection well is changed into normal water injection. The method has the advantages of being energy-saving and environment-friendly, simple in treatment process, low in investment cost and good in field test effect, and therefore, the method can be widely applied to the kitchen waste resource utilization technology.

Description

technical field [0001] The invention relates to a resource recovery and recycling method, in particular to a resource utilization method of kitchen waste. Background technique [0002] Kitchen waste is a general term for leftovers and kitchen waste produced by households, restaurants, canteens and other units. With the development of society, the amount of kitchen waste is increasing year by year. Food waste has a high moisture content, poor dehydration performance, high temperature and perishable, easy to breed mosquitoes and flies, and some food waste is directly used as feed by illegal traders to feed pigs Or refining waste oil, causing great harm to food safety. Therefore, the disposal of kitchen waste has become an urgent social problem to be solved. [0003] At present, there are several methods and advantages and disadvantages of kitchen waste treatment in my country: (1) landfill is the most important treatment method of urban domestic waste in my country, and more...

AI Technical Summary

Problems solved by technology

Although landfill treatment of waste has the advantages of large processing capacity, simple operation and management, low investment and operation costs, and strong adaptability, due to the lack of landfill site selection, design, and management, a large amount of landfill has caused landfills around cities to Serious waste of resources; landfills also generate a large amount of harmful gas fees; landfill leachate pollution is serious; (2) composting is a relatively common way of organic waste resource treatment, and composting of kitchen waste has the advantages of simple treatment method, It has strong practicability, is beneficial to replenish organic matter and trace elements in the soil, and realizes the advantages of resource reuse; the disadvantage is that it occupies a large area, the treatment cycle is long, and the sewage and odor generated during the composting process will cause secondary pollution to the surrounding environment. Higher salinity and oil content reduce the quality of compost, especially high salinity inhibits the growth of plants, and long-term use will also lead to salinization of the soil; (3) For safety reasons, many countries prohibit direct composting of swill As animal feed, people began to study the feed treatment of kitchen waste

This method of processing food waste has the advantages of safe operation, low cost, small footprint, and short feed production cycle; the disadvantage is that the waste must be collected and transported to the designated place in time, the equipment is complicated, the investment is huge at one time, and the waste storage time is short. (4) Biological fermentation treatment is to decompose and transform food waste through the metabolic activities of microorganisms to produce microbial protein feed

The advantages of biological fermentation treatment are less investment in equipment, small footprint, and low energy consumption; the disadvantage is that due to the complex composition of kitchen waste, there are many factors affecting the anaerobic process of organic matter, the growth and metabolism of bacteria requires a certain period of time, and the production cycle is longer , the efficiency of anaerobic fermentation is low, some strains need to be cultivated and domesticated, and the treatment must be timely

Therefore, it cannot be popularized and applied in a large area.