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Kitchen waste treatment method

A technology of food waste and treatment method, which is applied in the field of food waste treatment, can solve a large amount of energy consumption and other problems, and achieve the effects of realizing production capacity benefits, effective disposal and resource utilization, and strong operability

Pending Publication Date: 2021-08-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For inland and high-altitude areas where the temperature is low and the temperature difference between day and night is large, although biogas production can bring some productivity benefits, maintaining anaerobic fermentation at a constant temperature level usually requires a lot of energy consumption

Method used

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  • Kitchen waste treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 and embodiment 2 adopt the first kind of temperature control program: within 24 hours, the temperature is lowered from 35°C to 25°C, and then raised from 25°C to 35°C, as follows:

[0055] Example 1

[0056] A method for treating kitchen waste, comprising the steps of:

[0057] (1) Get 1kg of kitchen waste and place it in the first anaerobic fermentation container, then add 24kg of sludge inoculum in the first anaerobic fermentation container, wherein the solid content of the sludge inoculum is 4.8%, pH The value is 7.5.

[0058] The preparation method of sludge inoculum is as follows:

[0059] Get 1kg of sludge and 8kg of water from the concentration tank of the sewage plant that has a temperature difference greater than 20°C between day and night (taking Lhasa, Tibet as an example), and place it in the second anaerobic fermentation container; pass through the second anaerobic fermentation container Nitrogen was introduced to exhaust the air, the second a...

Embodiment 2

[0064] A method for treating kitchen waste, the difference from Example 1 is that the amount of sludge inoculum added is 48kg.

[0065] During the reaction to 50 days, a 60mL syringe was used to collect the biogas in the first anaerobic fermentation vessel, and the cumulative methane production was 460.60mL / g VS.

Embodiment 3

[0066] Embodiment 3 and embodiment 4 adopt the second kind of temperature control program: within 24 hours, the temperature is dropped from 25°C to 15°C, and then rises from 15°C to 25°C, specifically as follows:

[0067] Example 3

[0068] A method for treating kitchen waste, comprising the steps of:

[0069] (1) Get 1kg of kitchen waste and place it in the first anaerobic fermentation container, then add 24kg of sludge inoculum in the first anaerobic fermentation container, wherein the solid content of the sludge inoculum is 4.8%, pH The value is 7.5.

[0070] The preparation method of sludge inoculum is as follows:

[0071] Get 1kg of sludge and 8kg of water from the concentration tank of the sewage plant that has a temperature difference greater than 20°C between day and night (taking Lhasa, Tibet as an example), and place it in the second anaerobic fermentation container; pass through the second anaerobic fermentation container Nitrogen was introduced to discharge the ...

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Abstract

The invention discloses a kitchen waste treatment method which comprises the following steps: (1) putting kitchen waste into a fermentation container, adding a sludge inoculum, and carrying out anaerobic fermentation; (2) controlling the temperature in the fermentation container by a temperature control program, so that the temperature difference between the temperature in the fermentation container and the external temperature is kept within a preset range; wherein the sludge inoculum is prepared by reacting sludge from an area with day and night temperature difference greater than 20 DEG C with water.

Description

technical field [0001] The present disclosure relates to the technical field of solid waste treatment and recycling, in particular to a method for treating kitchen waste. Background technique [0002] The disposal and management of solid waste and the development and utilization of clean energy are two major problems in the environmental field. As the main solid waste in the city at present, kitchen waste has the characteristics of high water content, easy acidification, and strong odor, and it is easy to cause secondary pollution. At the same time, as a kind of renewable biomass energy, food waste has high potential. [0003] Therefore, the anaerobic digestion technology of biomass waste is currently used to convert biomass waste into methane, which not only reduces the pollution caused by solid waste, but also realizes the resource utilization of biomass. [0004] Anaerobic fermentation has the characteristics of low energy consumption, harmlessness, long-term sustainabi...

Claims

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Application Information

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IPC IPC(8): C12M1/38C12M1/34C12M1/107C12M1/04C12M1/02C12M1/00C12P5/02
CPCC12M21/04C12M27/02C12M29/06C12M41/12C12P5/023Y02E50/30
Inventor 陈冠益宋英今张颖秀李易航李金磊李瑞祎王雨欣
Owner TIANJIN UNIV