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Method for improving yield of biodiesel prepared through kitchen grease enzymic method through pretreatment

A biodiesel and enzymatic preparation technology, which is applied in the direction of biofuel, fatty substance recovery, recycling technology, etc., can solve the problems of low oil and fat precipitation from kitchen waste and low biodiesel production, and increase the precipitation of slick oil , promote transesterification reaction, increase the effect of diffusion coefficient

Active Publication Date: 2015-11-18
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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  • Method for improving yield of biodiesel prepared through kitchen grease enzymic method through pretreatment

Examples

Experimental program
Comparison scheme
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 carry out microwave, ultrasonic and hydrothermal treatment on the kitchen waste in sequence; the power of the microwave is 1000kw, so that the temperature of the kitchen grease is maintained at 110°C, and the treatment time is 20min; the power of the ultrasonic wave is 800w / L, and the treatment time is 15min; the hydrothermal treatment temperature is 180°C, and the treatment time is 90min; the above-mentioned treatment is carried out in an integrated equipment equipped with microwave generator, ultrasonic generator and hydrothermal device conduct.

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

[0057] S3. pass int...

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 particularly discloses a method for improving the yield of biodiesel prepared through a kitchen grease enzymic method through pretreatment. The method includes the following steps that firstly, impurities in kitchen waste are removed, and microwave treatment, ultrasonic wave treatment and hydro-thermal treatment is conducted on the kitchen waste in sequence; secondly, three-phase separation is conducted, and upper-layer grease is obtained; thirdly, oxidation is conducted by leading ozone in; fourthly, immobilized composite lipase is added into grease obtained in the third step, and short chain alcohol is added for conducting a transesterification reaction to prepare the biodiesel, wherein the immobilized composite lipase in the forth step comprises geotrichum candidum lipase, candida lipase and burkholderia cepacia lipase. According to the method, microwave treatment, ultrasonic wave treatment and hydro-thermal treatment are combined for treating kitchen waste, the kitchen grease precipitated amount is increased by 10-50 % than that before treatment and is increased by 2-30% than that obtained by adopting single pretreatment, the kitchen grease precipitated amount is effectively increased, and the productivity and the yield of the biodiesel prepared through the enzymic method are obviously improved.

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 Applications(China)
IPC IPC(8): C11C3/10C11B13/00C10L1/02
CPCY02E50/10Y02W30/74
Inventor 王春铭欧盛邦吴楚伟
Owner SOUTH CHINA AGRI UNIV
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