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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 number of poultry and animal carcasses and discarded vegetables and leaves from farmers are randomly discarded in inappropriate places, such as streams and rivers, causing serious pollution to the air, water sources and soil environment, and laying a hidden crisis for the spread of diseases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0036] S1. Collect and remove impurities: collect food waste and remove debris such as plastic, metal and glass.

[0037] S2. Pretreatment: The food waste is subjected to three-step hydrothermal treatment, that is, treatment at 120°C for 100 minutes; then, the temperature is raised to 300°C for 3 minutes; finally, the temperature is lowered to 90°C for 30 minutes.

[0038] S3. Three-phase separation: The pretreated food waste is sprayed into the three-phase separator, and the upper layer of grease, middle water, and lower layer of solid food waste are subjected to three-phase separation.

[0039] S4. Preparation of biodiesel from oil: under the action of catalyst sodium methoxide, the separated oil is transesterified with ethanol to prepare biodiesel, and at the same time, a 1kV electric field is introduced into the system, 10s / time, and a total of 100min; The yield of diese...

Embodiment 2

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

[0045] S1. Collection and removal of impurities: collect livestock carcasses, remove debris such as plastic, metal and glass, and then crush them.

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

[0047] S3. Three-phase separation: Spray the pretreated poultry and livestock carcasses into the three-phase separator, and after standing still, perform three-phase separation of the upper layer of oil, middle water, and lower layer of solid poultry and livestock carcasses.

[0048]S4. Preparation of biodiesel from oil: use sulfuric acid as a catalyst to prepare biodiesel from the separated oil, and at the same time pass an electric field of 0.1...

Embodiment 3

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

[0054] S1. Collect and remove impurities: collect food waste and remove debris such as plastic, metal and glass.

[0055] S2. Pretreatment: The food waste is subjected to hydrothermal treatment at a treatment temperature of 90°C and a treatment time of 100 minutes.

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

[0057] S4. Preparation of biodiesel from oil: under the action of catalyst lipase, the separated oil is transesterified with methanol to prepare biodiesel, and at the same time, a 12V electric field is introduced into the system, 10min / time, and a total of 24h; at this time, the biodiesel The yield of diesel is 93.6%.

[0058] S5. Fermentation of solid food waste to produce ethanol: add ethanol bacteria to the separated solid food waste for eth...

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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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