Method for improving in-situ fermentation of kitchen waste to produce caproic acid by using ferroferric oxide

By adding iron tetraoxide to the anaerobic fermentation system, lactic acid is generated by self-fermentation of kitchen waste, the problem of low caproic acid yield in the existing technology is solved, and efficient caproic acid biosynthesis is achieved, which is suitable for industrial applications.

CN119639831APending Publication Date: 2025-03-18PENYAO ENVIRONMENTAL PROTECTION
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Patent Information

Application Number
CN202411420028.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

In the prior art, the production of caproic acid and the conversion rate are low, which limits the efficiency of anaerobic fermentation of kitchen waste.

Method used

By adding the conductive promoter ferrous tetraoxide (Fe3O4) to the anaerobic fermentation system, the production of caproic acid during the anaerobic fermentation process is promoted, and lactic acid is self-fermented by carbohydrates in kitchen waste to produce lactic acid as an electron donor, achieving carbon chain extension and biosynthesis of caproic acid.

Benefits of technology

It improves the yield and conversion rate of caproic acid in anaerobic fermentation system, reduces the demand for exogenous electron donors, and achieves a more environmentally friendly and sustainable caproic acid biosynthesis path, which is suitable for industrial scale applications.

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Abstract

The invention discloses a method for improving caproic acid production through in-situ fermentation of kitchen waste by using ferroferric oxide, and relates to the field of organic solid waste treatment and recycling, in particular to a method for promoting the efficiency of caproic acid production through anaerobic fermentation by adding a conductive accelerant ferroferric oxide. According to the method, a proper amount of ferroferric oxide is added into a fermentation system, so that hydrolysis and acidification of a substrate are accelerated, electron transfer of microorganisms is promoted, anaerobic microorganisms are enriched, the carbon chain extension process of an anaerobic system can be promoted, and production of hexanoic acid is further promoted. Fe3O4 enhances the oxidation-reduction performance by inducing Fe < 2 + > and Fe < 3 + > to circulate, so that electron transfer is facilitated, and the anaerobic fermentation acid production efficiency of the kitchen waste is better regulated and controlled. Kitchen waste is fermented under an anaerobic condition to form lactic acid which is used as an electron donor, so that external electron donor source supplementation is not needed, and the method is a more sustainable hexanoic acid biosynthesis method; and the ferroferric oxide can be recycled after magnetic separation, so that the method has remarkable development potential and application prospect.
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