Full-quantitative treatment method for kitchen garbage

A kitchen waste quantitative treatment technology, which is applied in the field of full quantitative treatment of kitchen waste, can solve the problems of low calorific value of incineration, high oil and salt content, and perishability, so as to improve specific surface area and microporosity, improve Yield and calorific value, effect of organic matter reduction

Pending Publication Date: 2022-05-13
深圳市海立方生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, kitchen waste has the characteristics of high moisture, organic matter, oil and salt content, and is perishable. It is easy to breed bacteria, rot and smell, so it is not suitable for direct landfill
The high water content makes its incineration calorific value low, and the cost of direct incineration is high
In addition, a large amount of waste oil derived from kitchen waste enters the secondary market, posing a great threat to human health

Method used

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  • Full-quantitative treatment method for kitchen garbage
  • Full-quantitative treatment method for kitchen garbage
  • Full-quantitative treatment method for kitchen garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Example 1: Quantitative treatment method of kitchen waste

[0082]Fresh mixed kitchen waste (water content > 90%) is supplemented with distilled water according to 6 times the solid content (that is, the dry weight of fresh mixed kitchen waste) in the sealed hydrothermal carbonization reactor. For carbonization reaction, the amount of materials added is 70-80% of the volume of the reaction kettle, the stirring speed is 120 rpm, and the temperature is raised to 200° C., and kept for 1 hour. During the first hydrothermal carbonization reaction, no catalyst was added, and no other gas was introduced, and the hydrothermal carbonization reaction was carried out by the pressure generated by itself after the materials in the reactor were heated. After the first hydrothermal carbonization reaction ends, the first hydrothermal carbonization liquid-phase working medium is filtered and separated from the first hydrothermal carbon, and the first hydrothermal carbonization liquid-ph...

Embodiment 2

[0085] Embodiment 2: biochar-based organic fertilizer

[0086] In this example, the raw materials of the biochar-based organic fertilizer include: 100 kg of the liquid-phase product obtained in Example 1, 15 kg of activated hydrothermal carbon, and 0.5 kg of humic acid fertilizer.

[0087] Preparation process: Mix all the components in proportion. After the activated hydrothermal carbon and humic acid fertilizer fully absorb the liquid phase product, dry the mixture at 105 degrees until the moisture content of the mixture is about 50%. Use a disc The granulator performs granulation to form uniform granules with a particle size of 3-5mm. The composition ratio of the biochar-based organic fertilizer prepared in this embodiment is as follows:

[0088] components Content (wt%) Total nutrients (N+P 2 o 5 +K 2 O) mass fraction (based on drying basis)

[0089] The prepared biochar-based organic fertilizer has the nutrients required by the soil and the slow-rel...

Embodiment 3

[0090] Embodiment 3: Circulation treatment is to the enrichment effect of nutrient component in the treatment liquid

[0091] Experiment (1)

[0092] Using 50g fresh weight of mixed kitchen waste (water content>90%) similar to Example 1 above, add 100mL of water for the first time, and hydrothermal carbonization reaction occurs in a sealed hydrothermal carbonization reaction kettle, stirring speed 300rpm, Raise the temperature to 200°C and keep it warm for 1 hour, which is recorded as cycle 0; after the reaction is completed, filter, take 100 mL of the filtrate and add 50 g of the same vegetable kitchen waste, and carry out the hydrothermal carbonization reaction under the same treatment conditions as above, which is recorded as cycle 1 times; repeat the cycle in this way, a total of 3 cycles. The components of the treatment liquid and the weight of the dry hydrothermal carbon were tested separately, and the results are as follows:

[0093]

[0094]

[0095] The above ...

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Abstract

The invention discloses a full-quantitative treatment method for kitchen waste. Materials containing the kitchen garbage are subjected to N times of hydrothermal carbonization reactions under the closed high-pressure condition, a hydrothermal carbonization liquid-phase working medium and hydrothermal carbon are obtained in each hydrothermal carbonization reaction, and part of the hydrothermal carbonization liquid-phase working medium obtained in the (N-1) th time serves as a feeding material of the Nth time of hydrothermal carbonization reaction, carrying out hydrothermal carbonization reaction with a material containing the kitchen garbage to finally obtain a liquid-phase product; the liquid-phase product and hydrothermal carbon obtained by each hydrothermal carbonization reaction are used as raw materials of agricultural fertilizers; wherein N is an integer greater than or equal to 2. The hydrothermal carbonization liquid-phase working medium is recycled, components in the liquid-phase working medium are concentrated, the hydrothermal carbonization reaction process is catalyzed, and the hydrothermal carbon yield and heat value are increased.

Description

[0001] This application claims to enjoy the priority rights of the previous application with the application number 202011263147.1 and the title "A Quantitative Treatment Method for Kitchen Waste" submitted to the State Intellectual Property Office of China on November 12, 2020. The entirety of this prior application is incorporated herein by reference. technical field [0002] The invention belongs to the technical field of garbage treatment, and in particular relates to a fully quantitative treatment method for kitchen waste. Background technique [0003] In the new version of the "Domestic Waste Classification Mark" standard issued in 2019, kitchen waste and wet waste are unified as kitchen waste. Kitchen waste refers to the waste generated in the daily life of residents and activities such as food processing, catering services, and unit meals, including discarded food waste, leftovers, expired food, melon skin and fruit core, egg shells, and tea residue , traditional Ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F9/00C05D9/00C05G5/20C01B32/05C05G3/40C05G3/80C05G5/12
CPCC05F9/00C05D9/00C05G5/20C01B32/05C05G3/40C05G3/80C05G5/12C05F11/02Y02A40/20
Inventor 郑列列王浩石萍
Owner 深圳市海立方生物科技有限公司
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