Garbage type dry fermentation comprehensive treatment method for kitchen wastes and organic wastes

Abstract

The invention discloses a garbage type dry fermentation comprehensive treatment method for kitchen wastes and organic wastes. The organic wastes are selected from garden wastes, sludge from sewage treatment plants, straws, animal wastes, wood flour, saw dust and the like. The method comprises the steps of carrying out dehydration and degreasing pretreatment on the collected kitchen wastes at a transfer station; mixing the pretreated kitchen wastes and organic wastes to carry out garbage type dry anaerobic fermentation, and the like. The method disclosed by the invention is characterized in that the fermentation raw materials are very simple in pretreatment; no stirring equipment is arranged in an anaerobic tank, and the fermentation raw materials do not need to be continuously stirred; feeding and discharging can be finished without the help of a pump; no any mobile mechanical equipment is arranged in the anaerobic tank. Therefore, organic raw materials with relatively high impurity contents can be fermented. Compared with a wet fermentation technology, the garbage type dry fermentation comprehensive treatment method has the effect of remarkably reducing the investment and operation costs.

Description

technical field [0001] The invention belongs to the field of environmental protection, and particularly relates to a garage-type dry fermentation comprehensive treatment method for kitchen waste and various organic wastes. Background technique [0002] Kitchen waste refers to the waste such as leftovers and waste edible oils and fats generated in the activities of food processing, catering services, and unit meals other than the daily life of residents, commonly known as swill, swill or slop. The ingredients mainly include various rice and flour food residues, vegetables, fruit residues, various animal residues, vegetable and animal oils and fats. [0003] If food waste is not properly disposed of, it will cause the following hazards: [0004] 1. Pollution to the environment. The most serious pollution in kitchen waste is waste cooking oil, namely waste oil. Waste oil undergoes complex biochemical reactions in water, producing a series of aldehydes, acids and other odorou...

AI Technical Summary

Problems solved by technology

Waste oil clogs sewage pipes, causing sewage backwater; waste cooking oil flows into rivers, which can easily lead to biological hypoxia and suffocation

[0005] 2. Harm to human health

In addition, the consumption of swill by pigs is very easy to infect and induce various diseases, and the dosage of drugs for pigs will be increased, thereby increasing the residues of antibiotics in pigs

And there is a serious problem of protein homology pollution

[0006] 3. Affect food safety

Since the meat, bones, and internal organs of various animals in the kitchen waste are mixed together and cannot be accurately separated, there are indeed major hidden dangers in terms of animal food safety when using this raw material as feed.

[0013] 3. Traditional composting

However, there are disadvantages such as reaction temperature, insufficient pressure, high requirements for equipment, and high operating costs.

[0024] The main disadvantages of the biological enzyme method are: the substrate reduces the activity of the enzyme and has an inhibitory effect on it; the price of the enzyme is expensive and the life is short; lipase is not easy to disperse in organic solvents, there is aggregation, the catalytic efficiency is low, and the operating cost is high

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