Fermentation method for improving yield of volatile fatty acid of corn straw

Abstract

The invention discloses a fermentation method for increasing the yield of volatile fatty acid of corn straw. The fermentation method comprises the following steps: step 1, obtaining raw materials; 2, pretreating the raw materials; step 3, adding a microbial inoculum; step 4, compacting and sealing; step 5, silage fermentation; step 6, product detection; in the second step, the length of the crushed straw is 1-3 cm; in the step 3, the viable count of the lactobacillus plantarum-like (LpP) contained in the crushed straw reaches 105cfu / g FM; in the step 4, the compaction density reaches 0.57 to 0.6 kg / cm < 3 >; in the step 5, the internal temperature of the fermentation chamber is 20-30 DEG C; according to the method, the LpP is inoculated into the silage raw material, so that the yield of volatile fatty acid in the anaerobic fermentation process of the corn straws is effectively improved, the growth and reproduction of saccharomycetes and other adverse microorganisms are limited, and favorable conditions are provided for subsequent methane fermentation of the ear-removed corn; meanwhile, LpP inoculation can change the bacterial community composition of the silage, and safe storage of the silage is facilitated.

Description

technical field [0001] The invention relates to the technical field of silage, in particular to a fermentation method for increasing the yield of volatile fatty acids of corn stalks. Background technique [0002] Corn stover is one of the most common agricultural by-products, the rational utilization of corn stover will alleviate the energy crisis or feed shortage in biofuel / livestock production, thereby mitigating the risk of land and air pollution from its disposal; in practice, due to delay Harvested corn stover has high lignocellulose content and lignification degree, and its utilization efficiency is generally low; therefore, some technological advances have been made in enhancing anaerobic fermentation, such as selection of evergreen varieties and optimization of harvest maturity period; among these attempts , due to the relatively high yield and nutritional value, directly de-eared corn shows high potential for anaerobic fermentation, how to preserve the moist residue...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, Lactobacillus brauchneri is usually used to produce volatile fatty acids such as acetic acid and propionic acid from the anaerobic metabolism of lactic acid, but acetic acid is mainly produced in the late silage (>45d), which is not conducive to immediate Anaerobic fermentation produces biogas; and homofermentative lactic acid bacteria, such as Lactobacillus plantarum, only produce lactic acid and cannot promote the yield of volatile fatty acids

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