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A method for improving the yield of biodiesel produced by enzymatic method of cooking oil by using pretreatment

A biodiesel and enzymatic preparation technology, which is applied in the direction of biofuel, fat material recovery, recycling technology, etc., can solve the problems of low biodiesel production and low amount of grease precipitation from kitchen waste

Active Publication Date: 2021-06-15
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the highest yield of biodiesel in this invention reaches 98.3% (v / v), the yield of biodiesel is still low due to the low amount of grease precipitation per unit weight of food waste

Method used

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  • A method for improving the yield of biodiesel produced by enzymatic method of cooking oil by using pretreatment
  • A method for improving the yield of biodiesel produced by enzymatic method of cooking oil by using pretreatment

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A method for utilizing pretreatment to improve the production of biodiesel produced by enzymatic method of kitchen grease, comprising the steps of:

[0055] S1. Remove chopsticks, plastic bags and other sundries in the kitchen waste, and then subject the kitchen waste to microwave, ultrasonic and hydrothermal treatment in sequence; the power of the microwave is 1000 kw, so that the temperature of the kitchen grease is maintained at 110°C, and the treatment time is 20 min; the power of the ultrasonic wave is 800 w / L, and the processing time is 15 min; the hydrothermal treatment temperature is 180°C, and the processing time is 90 min; in an integrated device.

[0056] S2. Spray the food waste treated by S1 into another container, let it stand still to separate the three phases, and collect the upper layer of floating grease.

[0057] S3. Introduce ozone into the obtained kitchen grease so that the ozone concentration is 15 g / L, the ozone flow rate is 10 L / min, and the in...

Embodiment 2

[0065] The steps for preparing biodiesel in this example are basically the same as in Example 1, except that the compound lipase described in S3 and the immobilized compound lipase described in S4 are Geotrichum candidum lipase, Candida lipase and Burkhall onion The mass ratio of each enzyme of German bacteria lipase is 0.2:10:1.5 in step S3 and 1:1:25 in step S4.

[0066] The results of biodiesel preparation according to the above steps are shown in Table 1.

Embodiment 3

[0068] The steps for preparing biodiesel in this example are basically the same as in Example 1, the difference is that: ① The three-phase separation in step S2 is to release the pressure to normal pressure, and the kitchen waste is sent to the three-phase separator, and the kitchen waste is obtained after standing still. Grease, without spraying the food waste to another container; ② Geotrichum candidum lipase, Candida lipase and Burkholm onion in the composite lipase described in S3 and the immobilized composite lipase described in S4 The mass ratio of each enzyme of Erdella lipase is 6:1:15 in step S3 and 10:10:5 in step S4.

[0069] The results of biodiesel preparation according to the above steps are shown in Table 1.

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Abstract

The invention belongs to the technical field of kitchen waste treatment, and specifically discloses a method for improving the yield of biodiesel produced by enzymatically preparing kitchen grease by utilizing pretreatment. The method comprises the following steps: S1. removing sundries in the kitchen waste, and sequentially subjecting the kitchen waste to microwave, ultrasonic and hydrothermal treatment; S2. separating the three phases to obtain the upper layer of grease; S3. passing in ozone for oxidation; S4 .Add immobilized compound lipase to the oil obtained in S3, and add short-chain alcohol to carry out transesterification to prepare biodiesel; wherein, the immobilized compound lipase described in S4 includes Geotrichum candidum lipase, Candida lipase and onion lipase Burkholderia lipase. The invention adopts microwave, ultrasonic and hydrothermal treatment to jointly treat kitchen waste, and the amount of kitchen grease precipitation increases by 10-50% compared with that before treatment, and increases by 2-30% compared with single pretreatment, effectively increasing the amount of kitchen grease precipitation, and significantly Improve the yield and yield of biodiesel produced by enzymatic method.

Description

technical field [0001] The invention belongs to the technical field of kitchen waste treatment, and in particular relates to a method for improving the yield of biodiesel produced by enzymatic method of cooking oil by using pretreatment, in particular to a method for improving the production of biodiesel by using microwave, ultrasonic wave and hydrothermal treatment to improve the enzymatic method of preparing kitchen oil yield method. Background technique [0002] The preparation of biodiesel from kitchen fats and oils is a kind of renewable energy produced by using animal and vegetable fats and oils as raw materials through reaction modification, which can replace or partially replace petroleum diesel. In order to improve the yield and yield of biodiesel, in view of the poor mutual solubility of methanol and animal and vegetable oils, the reaction system is two-phase, the transesterification reaction only occurs at the interface, and the reaction rate is low, people gradua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64C11C3/10C11B13/00C10L1/02
CPCY02E50/10Y02W30/74
Inventor 王春铭欧盛邦吴楚伟
Owner SOUTH CHINA AGRI UNIV
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