Kitchen waste high-value-application method

A kitchen waste, high-value technology, applied in chemical instruments and methods, applications, animal feed, etc., can solve the problems of air, water and soil environmental pollution, difficult to completely dispose of kitchen waste, and single treatment methods. The effect of high resource utilization, high yield and simple process

Pending Publication Date: 2017-11-14
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment methods of food waste are single, such as composting, anaerobic fermentation to produce biogas, etc., it is difficult to realize the thorough treatment of food waste, the amount of residue generated is large, and the product outlet is difficult
In addition, a large

Method used

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Examples

Experimental program
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Example Embodiment

[0034] Example 1

[0035] A method for high-value utilization of food waste, the method comprising the following steps:

[0036] S1. Collection and removal of impurities: Collect food waste and remove plastic, metal, glass and other debris.

[0037] S2. Pretreatment: Three-step hydrothermal treatment of food waste, namely 120°C for 100 minutes; then, raise the temperature to 300°C and treat it for 3 minutes; finally, reduce the temperature to 90°C and treat it for 30 minutes.

[0038] S3. Three-phase separation: spray the pre-treated food waste into a three-phase separator to separate the upper layer of oil, middle water, and lower layer of solid food waste.

[0039] S4. Preparation of biodiesel from oils and fats: Under the action of the catalyst sodium methoxide, the separated oils are transesterified with ethanol to prepare biodiesel. At the same time, a 1kV electric field is applied to the system for 10s / time for a total of 100min; The diesel production rate reached 95.7%.

[0040] ...

Example Embodiment

[0043] Example 2

[0044] A method for high-value utilization of food waste, the method comprising the following steps:

[0045] S1. Collecting and removing impurities: collect the carcasses of poultry and livestock, remove plastic, metal, glass and other debris and break them.

[0046] S2. Pretreatment: The carcasses of poultry and livestock are subjected to hydrothermal, ultrasonic and microwave combined pretreatment, that is, after hydrothermal treatment at 200°C for 5 minutes, 1500w / L ultrasonic treatment is used for 5min, followed by 100w microwave treatment for 120min.

[0047] S3. Three-phase separation: spray the pretreated poultry and livestock carcasses into a three-phase separator, and then separate the upper layer of fat, middle water, and lower solid poultry carcasses after standing still.

[0048] S4. Preparation of biodiesel from oils: use sulfuric acid as a catalyst to prepare biodiesel from the separated oils. At the same time, a 0.1 kV electric field is applied to the ...

Example Embodiment

[0052] Example 3

[0053] A method for high-value utilization of food waste, the method comprising the following steps:

[0054] S1. Collection and removal of impurities: Collect food waste and remove plastic, metal, glass and other debris.

[0055] S2. Pretreatment: The food waste is subjected to hydrothermal treatment, the treatment temperature is 90℃, and the treatment time is 100min.

[0056] S3. Three-phase separation: Three-phase separation of the upper layer of grease, intermediate water, and lower layer of solid food waste of the pretreated food waste.

[0057] S4. Preparation of biodiesel from oil: Under the action of the catalyst lipase, the separated oil is transesterified with methanol to prepare biodiesel. At the same time, a 12V electric field is applied to the system, 10min / time, for a total of 24h; The diesel production rate reached 93.6%.

[0058] S5. Fermentation of solid food waste to produce ethanol: add ethanol strains to the separated solid food waste to carry out ...

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Abstract

The invention relates to a kitchen waste high-value-application method. The method comprises the following steps: S1, pretreatment: performing a hydro-thermal treatment on the kitchen waste, performing a three-phase separation on the treated kitchen waste; S2, preparation of biodiesel with grease: preparing the biodiesel by performing a transesterification on the grease prepared by three-phase separation in the S1 and short-chain alcohol under the action of a catalyst; S3, solid kitchen waste treatment: continuously performing alcohol fermentation and/or lactic acid fermentation on the solid kitchen waste prepared by the three-phase separation in the S1, feeding insects with the fermented residues; S4, waste water treatment: performing waste water treatment on waste water prepared by three-phase separation in the S1 and waste water generated by fermentation in the S3. By adopting the kitchen waste high-value-application method, the kitchen waste is treated comprehensively by combining a plurality of means to obtain high-valued products, and the treated kitchen waste is low in residue, and is high in utilization rate.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to a high-value utilization method of kitchen garbage. Background technique [0002] Kitchen waste, commonly known as swill, also known as swill and swill, is the domestic waste formed by residents in the process of daily consumption. It is easy to rot and deteriorate, emits stench, and spreads bacteria and viruses. The main components of food waste include rice and flour food. Residues, vegetables, animal and vegetable oils, meat and bones, etc.; in terms of chemical composition, there are starch, cellulose, protein, lipids, and inorganic salts. [0003] With the rapid development of our country's economy, the output of kitchen waste is increasing, and the phenomenon of "gutter oil" and "shui pig" are seriously endangering people's life and health. At present, there is a single treatment method for food waste, such as composting, anaerobic fermentation to produce biogas, etc. It i...

Claims

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Application Information

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IPC IPC(8): C11C3/10A23K10/12A23K10/18A23K50/90C02F3/00C02F3/12C12P7/08C12P7/56
CPCA23K10/12A23K10/18A23K50/90C02F3/005C02F3/1263C11C3/10C12P7/08C12P7/56Y02E50/10Y02W10/10
Inventor 王春铭
Owner SOUTH CHINA AGRI UNIV
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