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Method for producing lactic acid by using food waste

A technology of food waste and lactic acid, which is applied in the field of fermentation, can solve the problems of high cost of lactic acid, high moisture content of garbage, and affecting daily traffic in cities

Active Publication Date: 2012-04-25
天津北洋百川生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, food waste has been used as feed for pigs in my country, and they have been looking for a way out through the market. There are many problems in this treatment method: 1. The waste has high moisture content, high fluidity, and is easy to leak, causing secondary pollution
2. Garbage trucks affect daily urban traffic and pollute the environment
3. The garbage has not been treated in any way, and the hygiene of the pigs is worrying, which may easily lead to the occurrence of foot-and-mouth disease and other diseases
Chinese patent 200710071647 announced "a method for producing lactic acid by saccharifying food waste and fermenting food waste with Bacillus subtilis", and has proposed a very good treatment method, which solves the current cost of adding amylase or cellulase to food waste to produce lactic acid The problem of too high, and there are few types of miscellaneous acids in the fermentation broth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add biological bacteria solution and enzyme preparation to 1 kg of kitchen waste. The biological bacteria liquid comprises the following components: Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum, each added in a mass ratio of 0.1%. Among them, the cell concentrations of Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum were all at 6×10 8 pcs / ml to 8×10 8 pieces / ml. Adding a mixed enzyme preparation with a mass ratio of 0.1%, the enzyme preparation is composed of: amylase (200000u / g), cellulase (200000u / g), lipase (100000u / g), protease (100000u / g), Pectinase (100000u / g).

[0025] The composition mass ratio of the enzyme preparation is amylase: cellulase: lipase: protease: pectinase is 0.8: 0.6: 0.6: 0.8: 0.8. Then put the feed liquid added with the biological bacteria liquid and the enzyme preparation into the fermenter which is relatively closed an...

Embodiment 2

[0031] Add biological bacteria solution and enzyme preparation to 1 kg of kitchen waste. The biological bacteria liquid comprises the following components: Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum, each added in a mass ratio of 0.2%. Among them, the cell concentrations of Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum were all at 6×10 8 pcs / ml to 8×10 8 pieces / ml. Add the mixed enzyme preparation that mass ratio is 0.3%, the composition of enzyme preparation is: amylase (200000u / g), cellulase (200000u / g), protease (100000u / g), lipase (100000u / g), fruit Gluease (100000u / g).

[0032] Add the mixed enzyme preparation that mass ratio is 0.3%, the composition of enzyme preparation is: amylase (200000u / g), cellulase (200000u / g), protease (100000u / g), lipase (100000u / g), fruit Gluease (100000u / g.

[0033] The composition mass ratio of the enzyme prepara...

Embodiment 3

[0035] Add biological bacteria solution and enzyme preparation to 1 kg of kitchen waste. The biological bacteria liquid comprises the following components: Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum, each added in a mass proportion of 0.4%. Among them, the cell concentrations of Bacillus licheniformis, Bacillus megaterium, Bacillus natto, Bacillus subtilis, and Lactobacillus plantarum were all at 6×10 8 pcs / ml to 8×10 8 pieces / ml. Adding mass ratio is the mixed enzyme preparation of 0.5%, and the composition of enzyme preparation is: amylase (200000u / g), cellulase (200000u / g), protease (100000u / g), lipase (100000u / g), fruit Gluease (100000u / g).

[0036] Adding mass ratio is the mixed enzyme preparation of 0.5%, and the composition of enzyme preparation is: amylase (200000u / g), cellulase (200000u / g), protease (100000u / g), lipase (100000u / g), fruit Gluease (100000u / g.

[0037]The composition mass ratio of the ...

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PUM

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Abstract

The present invention discloses a method for producing lactic acid by using food waste, and relates to the field of fermentation. According to the present invention, a biological bacteria liquid and an enzyme preparation are adopted to treat the food waste, wherein the food waste is rich in starch, cellulose, fat, protein and other substances; the food waste is subjected to sealing fermentation for 48-84 hours at a temperature of 30-37 DEG C to produce the lactic acid; the fermented liquor is detected by a biological sensor, the highest lactic acid content is 20 g / L, and 100 g of the food waste can produce 15 g of the lactic acid with the conversion; the biological bacteria liquid comprises bnfillus licheniformis, bacillus larvae, bacillus natto, bacillus subtilis and lactobacillus plantarum; the enzyme preparation comprises the following components: amylase, cellulase, lipase, protease and pectinase. The purpose of the present invention is to reduce the environmental pollution causedby the food waste, change the waste into valuables, and carry out resource utilization for the food waste.

Description

technical field [0001] The invention belongs to the field of fermentation, in particular to a method for producing lactic acid by co-treating kitchen garbage with biological bacteria liquid and enzyme preparation. Background technique [0002] Food waste refers to leftovers, leftovers, vegetable roots and leaves, skin cores of melons and fruits, discarded animal tissues, etc. Its components are mainly sugar, fat, protein, salt, water, etc., and are rich in nutrients. For a long time, food waste has been used as feed for pigs in my country, and they have found their way out through the market. There are many problems in this treatment method: 1. The waste has a high moisture content, high fluidity, and is easy to leak, causing secondary pollution. 2. Garbage trucks affect the daily traffic in the city and pollute the environment. 3. The garbage has not been treated in any way, and the sanitation of the pigs is worrying, which may easily lead to the occurrence of foot-and-mou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P39/00C12P7/56C12R1/10C12R1/11C12R1/125C12R1/07C12R1/25
Inventor 乔长晟李利宁李政李栋
Owner 天津北洋百川生物技术有限公司
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