Method for efficiently producing biodiesel from kitchen grease

A biodiesel and oil technology, applied in the fields of biofuel, fat production, fat oil/fat refining, etc., can solve problems such as side reactions and affect product quality, and achieve the effects of less side reactions, greater popularization and application value, and improved yield.

Pending Publication Date: 2017-09-29
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many shortcomings in the above method, such as the equipment must be resistant to strong acid, and the use of concentrated sulfuric acid as catalyst is prone to side reactions, which affects product quality.

Method used

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  • Method for efficiently producing biodiesel from kitchen grease
  • Method for efficiently producing biodiesel from kitchen grease

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for efficiently producing biodiesel from kitchen fats and oils, said method comprising the steps of:

[0034] S1. Collect and remove impurities: collect food waste and remove debris such as plastic, metal and glass.

[0035] S2. Pretreatment: The food waste is subjected to hydrothermal treatment at a treatment temperature of 90°C and a treatment time of 100 minutes.

[0036] 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.

[0037] S4. Grease pretreatment: the separated grease is pretreated with 30g / L of ozone.

[0038] S5. Preparation of biodiesel from oil: 100g of oil separated from lipase (enzyme activity: 1000U / g, from Aspergillus niger Aspergillus niger , suitable for one-stage or multi-stage reaction), under the action of transesterification reaction with methanol to prepare biodiesel, the reaction temperature is 30°C, and the reaction is 22 ...

Embodiment 2

[0041] A method for efficiently producing biodiesel from kitchen fats and oils, said method comprising the steps of:

[0042] S1. Collect and remove impurities: collect food waste and remove debris such as plastic, metal and glass.

[0043] S2. Pretreatment: The food waste is subjected to hydrothermal treatment at a treatment temperature of 90°C and a treatment time of 100 minutes.

[0044] 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.

[0045] S4. Grease pretreatment: the separated grease is pretreated with 30g / L of ozone.

[0046] S5. Preparation of biodiesel from oil: 100g of oil separated from lipase (enzyme activity is 1000U / g, from Aspergillus niger Aspergillus niger , suitable for one-stage or multi-stage reactions), biodiesel was prepared by transesterification with methanol at a reaction temperature of 30°C for 22 hours; at the same time, an electric f...

Embodiment 3

[0049] A method for efficiently producing biodiesel from kitchen fats and oils, said method comprising the steps of:

[0050] S1. Collect and remove impurities: collect food waste and remove debris such as plastic, metal and glass.

[0051] 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.

[0052] 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.

[0053] S4. Grease pretreatment: the separated grease is pretreated with 5g / L of ozone.

[0054] S5. Preparation of biodiesel from oil: the oil after ozone pretreatment is used in catalyst lipase (enzyme activity is 50000U / g, from Candida Candida mycoderma , suitable for one...

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PUM

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Abstract

The invention relates to a method for efficiently producing biodiesel from kitchen grease. The method comprises the following steps: (S1) pretreatment: carrying out hydrothermal treatment on kitchen waste, and carrying out three-phase separation on the treated kitchen waste; and (S2) preparing the biodiesel from grease: carrying out ester exchange reaction with short chain alcohol under the action of an enzyme catalyst so as to prepare rough biodiesel, and distilling an obtained product, so as to obtain refined biodiesel, wherein the step (S2) is carried out in an electric field. According to the method, biodiesel is prepared by virtue of an enzymic method, and electric field treatment is carried out during the preparation of the biodiesel, so that the yield of the biodiesel is remarkably increased.

Description

technical field [0001] The invention relates to the field of garbage treatment, in particular to a method for efficiently producing biodiesel from kitchen oil. 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. The ingredients of the crudely processed and refined kitchen oil from kitchen waste are very close to those of vegetable oil, and can be directly used in the production of biodiesel as a semi-finished raw material. Although there is no shortage of vegetable oil resources in my country, considering population factors and food sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C11B3/12C11B3/02C11B3/00C12P7/64C10L1/02B09B3/00B09B5/00
CPCB09B3/00B09B5/00C10L1/02C11B3/001C11B3/02C11B3/12C11C3/10C12P7/649Y02E50/10
Inventor 王春铭
Owner SOUTH CHINA AGRI UNIV
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