Resource utilization method of kitchen waste

Abstract

The invention provides a resource utilization method of kitchen waste. The resource utilization method comprises the following steps: a. carrying out high-temperature instantaneous sterilization on the collected kitchen waste and then storing the sterilized kitchen waste; b. removing free water and oil out of the kitchen waste; c. carrying out oil-water separation and exchange reaction on a liquid phase so as to prepare biodiesel, and then carrying out waste water treatment; d. carrying out magnetic separation and further dewatering; e. processing with a catalyst; f. transforming combustion heat energy; and g. removing colloid out of the liquid phase through oil-water separation so that the colloid can be taken as fuel oil, and then carrying out waste water treatment on an aqueous phase. The resource utilization method has the beneficial effects that the kitchen waste is fully recycled so as to solve the problems of waste water, waste gas and the like; the effects of high efficiency, energy conservation, low consumption and environmental protection are realized; wastes are changed into valuables; and the treatment cost is low, thus achieving the purpose of circular economy.

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] Several methods and pros and cons of my country's kitchen waste disposal at present: 1) Landfill is the most important treatment method of my country's urban domestic waste, and more than 70% of domestic waste disposal, especially for non-recyclable waste, landfill is ideal, It is also the final treatment. Landfill is based on the principle of microbial anaerobic fermentation, slowly transforming garbage to achieve the purpose of harmlessness. There are two types of landfill: ①simple landfill, also known as traditional landfill; ②sanitary landfill. 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, ...

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 resource-based treatment method for organic waste. Food waste composting treatment has the advantages of simple treatment method and strong practicability, which is conducive to replenishing organic matter and trace elements in the soil and realizing resource reuse; the disadvantage is that it occupies an area The area is large and the treatment cycle is long. The sewage and odor generated during the composting process will cause secondary pollution to the surrounding environment. At the same time, the high salt and oil content will reduce the quality of the compost, especially the high salt content inhibits the growth of plants. Long-term Use will also lead to salinization of the soil

The advantages of biological fermentation treatment are less investment in equipment, small footprint, and low energy consumption; the disadvantages are that it takes a certain time for the growth and metabolism of bacteria, and the production cycle is longer, and some bacteria need to be cultivated and domesticated, and the treatment must be timely