Resource-based and harmless treatment method for kitchen waste

A technology of kitchen waste and treatment method, applied in the field of resource recovery and recycling, can solve the problems of large equipment investment, soil salinization, and low treatment cost, and achieve the effects of small investment, prevention of land salinization, and mature technology.

Inactive Publication Date: 2014-09-10
习建华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the existing kitchen waste treatment methods, the high salt content in fertilizer products easily causes soil salinization and the problem of large investment in equipment for anaerobic fermentati

Method used

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  • Resource-based and harmless treatment method for kitchen waste

Examples

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Embodiment 1

[0029] Embodiment 1: Referring to accompanying drawing 1, a kind of food waste recycling, harmless treatment method of the present invention is illustrated, and the steps are as follows:

[0030] (a) Sorting of food waste: unload the food waste into the hopper, send it to the mechanical sorter by the scraper conveyor, and then sort it mechanically and manually to ensure that the plastic and glass in the food waste Bottles, chopsticks, ceramics and other sundries are separated, recyclable sundries are recycled, and unusable sundries are transported to sanitary landfills for landfill.

[0031] (b) Water bath desalination: Put the sorted food waste into the water bath, then add water, heat and stir to make it fully mixed, which is the process of diluting and desalinating the salt content of the food waste. Optimum process conditions: V (volume of water) / V (volume of food waste) = 2, stirring time 10 minutes, temperature 25°C, the salt content of food waste decreased from (0.84±0....

Embodiment 2

[0041] Example 2: The difference from Example 1 is that in step (b) water bath desalination, process conditions: V (volume of water) / V (volume of food waste) = 1.5, stirring time 8 min, temperature 20°C. Step (d) During the aerobic fermentation of the solid content: the crusher crushes the solid content of the food waste into fine particles, adjusts the moisture content of the solid content to 50%, and puts in straw to adjust the carbon-nitrogen ratio (C / N) of the mixture to 25 : 1, the mass ratio of microbial inoculum inoculum is 1 / 100,000, heat preservation and mechanical stirring at a temperature of 80°C for 3 hours of high-temperature sterilization, then cool down and keep the temperature at 50°C for 8 hours, and the fermentation ends After sieving, it will be bagged and made into organic fertilizer after 6 days of decomposing. Step (e) During the anaerobic fermentation of waste liquid: the sewage is passed into the anaerobic fermentation tank, organic matter and water are...

Embodiment 3

[0042] Example 3: The difference from Example 1 is that in step (b) water bath desalination, process conditions: V (volume of water) / V (volume of food waste) = 2.5, stirring time 15 min, temperature 30°C. Step (d) During the aerobic fermentation of the solid content: the crusher crushes the solid content of the food waste into fine particles, adjusts the moisture content of the solid content to 60%, and puts in straw to adjust the carbon-nitrogen ratio (C / N) of the mixture to 30 : 1, the mass ratio of microbial inoculum inoculum is 2 / 100,000, heat preservation and mechanical stirring at a temperature of 90°C for 1 hour of high-temperature sterilization, then cool down and keep the temperature at 60°C for 6 hours, and the fermentation ends After sieving, it will be bagged and made into organic fertilizer after 6 days of decomposing. Through biological fermentation, it can kill harmful microorganisms in food waste and produce high-efficiency organic fertilizers. Step (e) During...

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Abstract

Relating to the technical field of resource recovery and recycling, the invention discloses a resource-based and harmless treatment method for kitchen waste. The method is directed at the problems of high salt content in fertilizer products, easy cause of soil salinization, and large equipment investment for anaerobic fermentation of total waste in existing kitchen waste treatment methods. The method comprises the steps of: (a) kitchen waste sorting; (b) water bath desalting: adding water, and conducting heating and stirring to dilute salt; (c) solid-liquid separation: dehydrating the waste; (d) solid material aerobic fermentation: crushing the dehydrated solid material into small particles, and conducting aerobic fermentation and drying treatment to obtain an organic fertilizer; and (e) waste liquid anaerobic fermentation: conducting oil-water separation on the waste liquid, recovering grease, subjecting sewage to anaerobic fermentation, making the produced biogas residue and biogas slurry into a liquid fertilizer, and taking the produced biogas as the fuel of a biogas boiler. The method provided by the invention is particularly suitable for resource-based and harmless treatment of kitchen waste.

Description

technical field [0001] The invention relates to the technical field of resource recovery and recycling, in particular to a recycling and harmless treatment method for kitchen waste. Background technique [0002] Chinese food culture has a long history. As the pillar industry of the Chinese nation's food culture - the catering industry, under the conditions of satisfying the material civilization and reasonable diet of the masses, it also derives some undesirable products closely related to the living environment, namely kitchen waste and Waste oil. The emergence of a large number of kitchen waste has greatly endangered the water and soil, the atmospheric environment and the health of people's lives on which we depend. [0003] These food wastes contain a large amount of animal and vegetable oils, starches, and organic substances. If these organic substances rich in animal and vegetable oils, proteins, and amino acids are directly discharged into the water body without treat...

Claims

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Application Information

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IPC IPC(8): C05F9/04C12P5/02
CPCY02E50/343Y02A40/20Y02E50/30Y02W30/40
Inventor 习建华习枫李勇
Owner 习建华
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