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A method for solid-phase microwave moist heat deoiling of kitchen waste

A food waste and wet heat technology, which is applied in the field of food waste solid-phase microwave wet heat deoiling, can solve the problems of uneven heating, low rate, and long heating time, and achieve short heating time, shortened heating time, and shortened heating time. Effect

Inactive Publication Date: 2015-10-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of microwave technology in the process of wet heat treatment of kitchen waste can solve the traditional problems of long heating time, low rate, uneven heating, etc., effectively promote the rate of solid-phase oil leaching, and improve the purification and recovery rate of waste oil. Subsequent resource utilization of food waste is of great significance
At present, there is no method to promote solid-phase deoiling of food waste by using microwave-assisted moist heat technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put the pretreated food waste sample with a particle size of 8 mesh and an oil content of 18.2% into a microwave damp heat reactor, add 300mL of deionized water to mix, and stir in a closed reactor. Set the specific microwave radiation power to 100W , heated to make the reaction kettle warm up to 80oC and keep it for 10 minutes, cooling the microwave damp heat reaction kettle, the solid phase product after centrifugation, and the liquid phase oil was collected at the same time, and the oil removal rate could reach 60.3%.

Embodiment 2

[0024] Put the pretreated food waste sample with a particle size of 10 mesh and an oil content of 18.2% into the microwave damp heat reactor, and at the same time add 300mL of deionized water to mix well, stir in the sealed microwave damp heat reactor, and set a specific microwave radiation power It is 800W, heating the reactor to 80oC and keeping it for 60 minutes, cooling the microwave damp heat reactor, centrifuging the solid phase product, and collecting the liquid phase oil at the same time, the oil removal rate can reach 65.2%.

Embodiment 3

[0026] Put the pretreated food waste sample with a particle size of 20 mesh and an oil content of 29.5% into the microwave damp heat reactor, and at the same time add 300mL deionized water to mix well, stir in the sealed microwave damp heat reactor, and set the specific microwave radiation power Heating to 2000W, heating the reactor to 80oC and maintaining it for 120min, cooling the microwave damp heat reactor, centrifuging the solid phase product and collecting the liquid phase oil at the same time, the oil removal rate can reach 70.2%.

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PUM

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Abstract

The invention belongs to the field of resource pretreatment of kitchen waste, and in particular relates to a method for solid-phase microwave moist heat deoiling of kitchen waste. Add a certain particle size of food waste that has undergone preliminary solid-liquid separation into the microwave damp heat reaction kettle and add a certain amount of deionized water; close the reaction kettle, set a specific microwave heating power, and heat the reaction kettle to the set temperature. Set the temperature and keep it constant for a certain period of time; cool down the reactor, and centrifuge to collect the solid phase product. The invention can realize the effective control of the solid-phase deoiling efficiency by adjusting the temperature, time and microwave power, and the method provides a new approach for the solid-phase deoiling treatment of kitchen waste.

Description

technical field [0001] The invention belongs to the field of resource pretreatment of kitchen waste, and in particular relates to a method for solid-phase microwave moist heat deoiling of kitchen waste. Background technique [0002] With the development of social economy and the improvement of people's living standards, the amount of municipal solid waste is increasing day by day, especially the most rapid growth of kitchen waste. Food waste has a high organic content and is extremely perishable. If it is not disposed of properly, it will cause great pollution to the environment. But on the other hand, the nutrient-rich characteristics of food waste also make it a good resource raw material. If it is used rationally, it will create huge resource utilization value. [0003] Grease is a relatively high content of food waste, accounting for about 20% to 30% of the dry matter of food waste. In the process of resource utilization of food waste, the existence of oil has a negati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00
Inventor 李光明胡昊王凡贺文智黄菊文安莹
Owner TONGJI UNIV
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