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Method of preparing organic fertilizer from restaurant refuse by wet hot heating process

A technology of catering waste and organic fertilizer, which is applied in the field of solid waste treatment and disposal, can solve the problems of low treatment temperature and inability to completely kill germs, achieve the effects of improving processing performance, easy and complete sterilization, and improving physical processing performance

Inactive Publication Date: 2005-03-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage is that the treatment temperature is too low, only 60°C to 90°C, which cannot completely kill the germs

Method used

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  • Method of preparing organic fertilizer from restaurant refuse by wet hot heating process

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Comparison scheme
Effect test

Embodiment 1

[0031]The amount of catering waste generated by a single restaurant is small, and its on-site treatment adopts a small-scale wet heat treatment process. When collecting catering waste, remove non-nutrient components such as bottle caps, plastic bags, chopsticks, spoons, and metals from catering waste. Then utilize the cutting crusher to cut the thicker, harder materials such as bones in the rubbish into fritters, and the crusher used here can adopt the disclosed cutting crusher of Chinese patent CN1087556. Then put the garbage into the wet heat reactor, adjust the water surface to submerge the solid matter, heat the garbage to 135°C in the water-containing environment, and stay for 30 minutes. The heating method adopts heat conduction oil heating. Gradually release the pressure of the wet heat treated garbage to realize puffing. The method is to connect the wet heat reactor to a container with a volume much larger than it through the solenoid valve, and the container is conne...

Embodiment 2

[0033] The amount of catering waste in the region is relatively large, and the centralized treatment of catering waste adopts a large-scale wet heat treatment process. When collecting catering waste, remove non-nutrient components such as bottle caps, plastic bags, chopsticks, spoons, and metals from catering waste. Transport the catering waste generated by the catering units in the area to the centralized treatment plant. Utilize the cutting crusher to cut the thicker and harder materials such as bones in the garbage into small pieces. The crusher used here can adopt the cutting crusher disclosed in Chinese patent CN1087556. Then send the garbage to the wet heat reactor, adjust the moisture content of the garbage until the liquid surface submerges the solid matter, heat to 135°C for 30 minutes, and use heat transfer oil for heating. Instantly release the pressure of the wet heat treated garbage to realize puffing. The method is to connect the wet heat reactor with the outsid...

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Abstract

A process for preparing organic fertilizer from the garbage rejected by restaurant incldues such steps as removing impurities, breaking, wet heating, puffing, dewatering, deoiling, recovering oil and fermenting.

Description

technical field [0001] The invention relates to a method for treating and disposing of solid waste, more particularly, the technology is a method for preparing organic fertilizer through harmless and resourceful humid heat treatment of dining waste, which belongs to the technical field of solid waste treatment and disposal. Background technique [0002] The amount of catering waste generated in my country's cities is large and wide-ranging. It is mainly the leftovers generated in the operation process of hotels, restaurants, canteens of enterprises and institutions, leftovers from food production and processing departments, and kitchen waste generated from household kitchens. Wait for the mixture. This kind of garbage occupies a very important position in urban domestic garbage because of its high moisture content, high content of recyclable resources, and easy corruption and pollution of the environment. [0003] Due to the high moisture content and high nutrient content of...

Claims

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Application Information

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IPC IPC(8): B09B3/00C05F9/00C05F9/04
CPCY02A40/20
Inventor 聂永丰任连海王宇卓
Owner TSINGHUA UNIV
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