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High-quality composting pretreatment method and device for urban kitchen waste

A food waste and pretreatment technology, applied in the direction of organic fertilizer, climate change adaptation, etc., can solve the problems of difficult to guarantee the quality of composting, poor physical properties of food waste, etc., and achieve operability, resistance to corruption and odor, The effect of inhibiting the growth of spoilage bacteria

Inactive Publication Date: 2011-06-22
姜虎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aforementioned method is difficult to solve environmental pollution problems such as rot in the food waste collection process, and the separated food waste has poor physical properties, which brings many disadvantages to subsequent composting and its products, and the quality of composting is difficult to guarantee

Method used

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  • High-quality composting pretreatment method and device for urban kitchen waste
  • High-quality composting pretreatment method and device for urban kitchen waste
  • High-quality composting pretreatment method and device for urban kitchen waste

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: 90kg of food waste in a canteen of a certain enterprise, with a moisture content of about 85%, squeezed the food waste with a screw press to make the water content of the food waste reach 68%, and combined the squeezed food waste with a paper cutter 6kg of office waste paper discharged, 12kg of composted return material, added to composting pretreatment equipment for 60 minutes, and finally obtained a homogeneous composting pretreatment 59.2kg, composting pretreatment moisture 54.2%, total carbon 38.21% , total nitrogen 1.05%, C / N=36.39%.

Embodiment 2

[0025] Example 2: 120kg of food waste in a canteen of a certain enterprise, with a moisture content of about 88%, squeezed the food waste with a screw press to make the water content of the food waste reach 70.1%, and combined the squeezed food waste with a paper cutter 8kg of office waste paper discharged, 18kg of composted return material, added to composting pretreatment equipment for 60 minutes, and finally 73kg of homogeneous composting pretreated material was obtained. The composting pretreated material contained 53.6% moisture and 41.25% total carbon. Total nitrogen 1.12%, C / N=36.83%.

Embodiment 3

[0026] Embodiment 3: 102kg of kitchen waste in a certain hotel restaurant, about 86% of moisture, the kitchen waste is squeezed with a screw press to make the moisture of the kitchen waste reach 71%, and the squeezed kitchen waste and sawdust 7kg, 14kg of composting returned material was added to the composting pretreatment equipment for 60 minutes, and finally 73.6kg of homogeneous composting pretreatment was obtained. The composting pretreatment contained 57.7% moisture, 42.10% total carbon, 1.29% total nitrogen, / N=32.64%.

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Abstract

The invention relates to a high-quality composting pretreatment method and a high-quality composting pretreatment device for urban kitchen waste. The kitchen waste is pressed by a pressofiner; the pressed kitchen waste, a moisture regulation auxiliary material and a biological regulation auxiliary material are put into an agitation tank of a stirrer; and the mixed materials are crushed, rolled and stirred uniformly to form a composting pretreatment substance. By the invention, the kitchen waste can be pretreated efficiently in real time, and the high-quality composting of the kitchen waste is facilitated.

Description

technical field [0001] The invention relates to a high-quality composting pretreatment method and device for urban kitchen waste. Background technique [0002] Most domestic restaurants, canteens, etc. concentratedly discharge food waste mixed with other domestic waste. Since food waste contains a lot of water and is easy to rot, it is not only difficult to separate and recycle the mixed domestic waste, but also in During the treatment process, a large amount of landfill leachate, landfill gas, incineration waste gas, etc. will be generated, causing secondary pollution. Food waste is originally a valuable organic resource, but it has brought great difficulties and disadvantages to subsequent treatment after being mixed with other domestic waste. [0003] In the prior art, methods such as screening, gravity separation, magnetic separation, electric separation, water washing, and photoelectric separation are used to classify waste, and kitchen waste is separated from mixed do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F9/00C05F9/02
CPCY02A40/20
Inventor 姜虎
Owner 姜虎
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