Kitchen waste deep recycling treatment method

The technology of a kitchen waste and a treatment method, which is applied in the field of kitchen waste, can solve the problems such as difficulty in breeding and screening of black soldier flies, low crude oil yield, difficulty in realizing automation and large-scale breeding, etc. And the increase of labor cost, the uniform nutrient density, the effect of shortening the breeding cycle

Inactive Publication Date: 2021-05-04
DONGJIANG ENVIRONMENTAL
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Problems solved by technology

[0005] (1) Only the filtrate in the kitchen waste is subjected to three-phase separation to extract crude oil, the crude oil in the slag is not fully utilized, and the yield of crude oil is low;
[0006] (2) Black soldier fly breeding and screening control is difficult, and it is difficult to realize automation and large-scale breeding

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1. In-depth pretreatment: take 100t / d of food waste, and perform the following operations on the food waste:

[0041] Solid-liquid separation treatment: Pour 100t / d of kitchen waste into the unloading bin, which is connected to a U-shaped shaftless screw conveying device with an angle of 27° between the horizontal plane. The U-shaped shaftless screw conveying device includes a tank lining Plate and shaftless spiral body, the tank lining plate is provided with a round hole, the diameter of the round hole is 10mm, when the food waste is transported in the U-shaped shaftless spiral conveying tank, 30% of the liquid in the food waste passes through the tank The round holes in the liner flow into the filtrate tank, so that the liquid and solid in the food waste are separated, and the filtrate and solid food waste are obtained. The moisture content of the solid food waste is 85%; the solid food waste passes through the U-shaped shaftless The screw conveying device conveys to...

Embodiment 2

[0055] The difference between this embodiment and Example 1 is that in step S2, the oil content of the crude oil is 97.22%, the oil content of the waste water is 0.28%, the water content of the organic residue is 73%, and the oil content of the organic residue is 0.26%. , in step S3, the auxiliary material added in the mixture is the wheat bran of 5.9t / d, obtains the mixture of 37.9t / d altogether, adjusts the moisture content of mixture to 73%; In step S4 worm egg hatching step, worm, In the excrement separation step, the black soldier fly larvae sieved out at the outlet of the 6mm sieve frame was 12.6t / d, and the excrement sieved out at the outlet of the 3mm sieve frame was 25.3t / d; in step S5, the high-quality high-protein dry worms obtained were 4.21t / d, the obtained organic fertilizer is 19.5t / d.

[0056] The materials, reaction conditions and prepared materials used in the embodiment 1-2 are shown in the table below,

[0057]

[0058]

[0059] In the present invent...

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Abstract

The invention relates to the technical field of kitchen waste treatment, in particular to a kitchen waste deep recycling treatment method. The kitchen waste deep recycling treatment method comprises the steps of deep pretreatment, three-phase separation treatment, organic feed preparation, hermetia illucens breeding and hermetia illucens recycling treatment. According to the kitchen waste deep recycling treatment method, the recovery rate of the crude oil in the kitchen waste is increased, and the oil content of the produced crude oil is up to 97%; wastewater generated in the treatment process can directly enter a sewage treatment station without anaerobic digestion, meanwhile, part of the wastewater can be used for preparing the hermetia illucens breeding feed, so that the pressure of the sewage treatment station is relieved, and the investment cost is reduced; the prepared organic feed is high and uniform in nutrition density, the breeding period of the hermetia illucens is shortened, and mechanical screening of larvae and fecula of the hermetia illucens is achieved; and the hermetia illucens are bred by adopting automatic equipment such as an automatic guide transport vehicle, so that automatic and large-scale breeding of the hermetia illucens is realized, the labor cost is saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of kitchen waste, more specifically, it relates to a treatment method for deep recycling of kitchen waste. Background technique [0002] Food waste refers to food waste and food residues in families, schools, public canteens of government agencies, and the catering industry. It has the characteristics of high moisture content, rich organic matter content, and high salt content, and has great recycling value. [0003] Food waste is easy to rot and breed bacteria. If it is not handled properly, the environmental pollution will be very serious. At present, the treatment method of food waste in my country is to go through pretreatment such as sorting, crushing and pressing, and then re-use the filtrate and slag after pressing. For resource utilization, the main resource recovery processes are as follows: the filtrate is subjected to three-phase separation to extract crude oil. The yield of crude oil in this proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/033A23K50/90A23K10/26A23K10/37A23K20/10C05F3/00B09B3/00B09B5/00
CPCA01K67/033A23K50/90A23K10/26A23K10/37A23K20/10C05F3/00B09B3/00B09B5/00Y02P60/87Y02A40/20
Inventor 杨林张艳华徐文彬郭杏林周凯胡文静
Owner DONGJIANG ENVIRONMENTAL
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