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A method for resource utilization of kitchen waste to produce new type of fertilizer

A kitchen waste and recycling technology, applied in the field of kitchen waste recycling and production of new fertilizers, can solve the problems of complex composition of kitchen waste, unsuitable for direct incineration treatment, backward urban kitchen waste treatment capacity, etc., and achieve good economic benefits. , the effect of high practical promotion value

Active Publication Date: 2015-09-02
青岛福创环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Research shows that the food waste produced by catering enterprises in my country has exceeded 30 million tons every year, which is an astonishing amount, but the urban food waste treatment capacity is relatively seriously behind
Kitchen waste is an important part of organic waste in municipal solid waste (MSW). Its physical and chemical characteristics are high moisture and high organic matter content, and its oil content is much higher than other organic waste. The main nutrients are water, The contents of protein, fat, sugar and salt are 73.03%, 12.16%, 6.23%, 4.16%, and 1.24% respectively; the ash content is 1.75%, and the total carbon content is 13.95%, which is not suitable for direct incineration; Anaerobic digestion treatment accounts for the highest proportion of utilization, followed by aerobic fermentation to make organic fertilizer. However, due to the complex composition of food waste, there are always waste plastics, waste metal particles, etc. in the traditional food waste manufacturing organic fertilizer process route. ; Therefore, it is inevitable to rationally design a technology that is economically feasible and can be promoted on a large scale by using food waste to ferment new fertilizers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1000 g of recovered fruit and vegetable kitchen waste, measure the water content to be 80%, adjust the solid-liquid ratio to 1:10 with a weak alkali waste liquid with a pH of 9, and heat it in a water bath at 20°C for 2 h to soften the pre-soaked waste for later use. Crushing of the process; carry out hydraulic crushing on the above-mentioned kitchen waste cleaned by adding weak alkali waste liquid, and crush the plastic products in it, so as to facilitate the complete release of the garbage in the plastic bag; press and screen the kitchen waste after hydraulic crushing , the water after pressing is waste weak alkaline water, return to the previous process for cleaning, the solid enters the next process, the temperature is controlled at 60 ° C, the solid obtained by sieving is heated for 2 hours, and the stirring device is slowly stirred while heating; After the reaction, most of the food waste has been decomposed into small molecules such as sugars and other substa...

Embodiment 2

[0024] Take 2000 g of recovered fruit and vegetable kitchen waste, measure the water content to be 83%, adjust the solid-liquid ratio to 1:10 with weak alkali waste liquid with pH of 9, heat it in a water bath at 30°C for 1.5 h, and soften the pre-soaked waste for later use. Crushing of the process; carry out hydraulic crushing on the above-mentioned kitchen waste cleaned by adding weak alkali waste liquid, and crush the plastic products in it, so as to facilitate the complete release of the garbage in the plastic bag; press and screen the kitchen waste after hydraulic crushing , the water after pressing is waste weak alkaline water, return to the previous process for cleaning, the solid enters the next process, the temperature is controlled at 70 ° C, the solid obtained by sieving is heated for 1.5 h, and the stirring device is slowly stirred while heating; After the reaction, most of the food waste has been decomposed into small molecules such as sugars and other substances i...

Embodiment 3

[0026] Take 2500 g of recovered fruit and vegetable kitchen waste, measure the water content to be 84%, adjust the solid-liquid ratio to 1:10 with weak alkali waste liquid with a pH of 9, and heat it in a water bath at 50°C for 1.2 h to soften the pre-soaked waste for later use. Crushing of the process; carry out hydraulic crushing on the above-mentioned kitchen waste cleaned by adding weak alkali waste liquid, and crush the plastic products in it, so as to facilitate the complete release of the garbage in the plastic bag; press and screen the kitchen waste after hydraulic crushing , the water after pressing is waste weak alkaline water, return to the previous process for cleaning, the solid enters the next process, the temperature is controlled at 85 ° C, the solid obtained by sieving is heated for 1 h, and the stirring device is slowly stirred while heating; After the reaction, most of the food waste has been decomposed into small molecules such as sugars and other substances...

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PUM

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Abstract

The invention discloses a method for producing a novel fertilizer by resourcefully utilizing kitchen wastes. The method is characterized by comprising the following steps: (1) washing the kitchen wastes by using weak-alkaline waste liquid; softening and pre-immersing; (2) crushing by hydraulic power; (3) squeezing and sieving; (4) carrying out heating treatment on solids obtained by the sieving; (5) filtering; (6) mixing a filtering solution and a filtering solution obtained by the primary washing, adding optional strains, and fermenting; and (7) after fermenting, adjusting the concentration of material liquid and spraying and granulating to prepare the novel fertilizer. According to the method disclosed by the invention, a biochemical method is used for resourcefully utilizing the kitchen wastes to produce the novel fertilizer so as to reduce the cost of treating the kitchen wastes; the economic benefits are good and the quality of a product is better than (accords with) national standards; the product has high practical and promotional values.

Description

technical field [0001] The invention belongs to the field of renewable resources, and more specifically relates to a method for resource utilization of kitchen waste to produce novel fertilizers. technical background [0002] With the development of society, free "convenience bags" are restricted, dirty garbage can only be used in hand buckets, and the smell is suffocating. Environmental protection has become an issue of concern to everyone. The pollution of the home environment makes everyone feel anxious about the quality of life of themselves and their families. After busy work, they always want to find a peace and warmth at home. A delicious home-cooked meal, a plate of fruit, and a cup of tea have become a kind of enjoyment for everyone, but after the food, kitchen waste is also produced immediately, which is annoying. [0003] Research shows that the food waste generated by my country's catering enterprises has exceeded 30 million tons every year, which is an astonis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F9/00
CPCY02W30/47Y02A40/20Y02E50/30Y02W30/40
Inventor 任宪君王春燕张秋艳
Owner 青岛福创环境科技有限公司