Method for producing lactic acid by using food waste

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...