Double-Coated Schizochytrium Powder for Lower-Methane Dairy Feed
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Solution Overview
Problem
Livestock husbandry, particularly dairy cows, contribute significantly to methane emissions due to rumen fermentation, which not only exacerbates the greenhouse effect but also reduces feed utilization rates, necessitating an effective method to reduce methane production.
Innovation Solution
A schizochytrium powder is prepared through a multi-layer core-coating process involving fatty acid esters, lysozyme, and specific additives like D-alloisoleucine, D-2-aminobutyric acid, and 4-hydroxy-3-methoxybenzoic acid to regulate microbial communities in the rumen, promoting a propionic acid pathway and reducing methane emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ruminants degrade carbohydrates through rumen fermentation to produce energy, then energy and nutrients are provided for animal bodies, but methane is generated in the fermentation process which exacerbates the greenhouse effect and reduces feed utilization rate
Solution Approach 1:
The patent introduces an intermediary substance (specific microalgal strain or fermentation additive) that mediates the rumen fermentation process. This intermediary redirects the fermentation pathway to produce less methane while maintaining energy production, acting as a bridge between the substrate and the desired products without eliminating the fermentation process itself.
Solution Approach 2:
The patent changes the parameters of the fermentation system by introducing specific strains or additives that alter the microbial community composition and metabolic pathways. This shifts the fermentation outcome from high-methane production to low-methane production while preserving energy generation, effectively changing the chemical parameters of the rumen environment.
2Quantity of substance
If ruminants degrade carbohydrates through rumen fermentation, then volatile fatty acids are produced as energy source, but methane is simultaneously produced which reduces feed utilization rate
Solution Approach 1:
The patent converts the harmful methane production into a beneficial process by introducing additives that redirect the fermentation pathway. The same fermentation process that produces volatile fatty acids is enhanced to produce even more VFAs while suppressing methane, effectively turning the methane-generating process into a dual-benefit process that increases both VFA production and feed utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The schizochytrium powder effectively reduces methane emissions, increases volatile fatty acid content, enhances nutrient absorption, and increases docosahexaenoic acid (DHA) content in milk, while maintaining feed utilization and milk production.
Implementation Method 1
The sugar produced during the fermentation of fibrous materials is fermented into acetic acid, propionic acid, butyric acid, and volatile fatty acids (VFAs) under the action of ruminal microorganisms.
Implementation Method 2
Methanobrevibacter follows a hydrogenotrophic methanogenesis pathway, using hydrogen, carbon dioxide, and formate-produced by bacteria and fungi-as substrates to generate methane.
Data Source
Figure 1
AI summary
this application relates to the technical field of feed, and specifically discloses a schizochytrium powder for reducing methane emissions from dairy cows, a method for preparing same, and a double-layer whole-cell microalgal schizochytrium powder or a whole-cell microalgal schizochytrium powder of a structure that contains a schizochytrium core and a double-layer outer coating, the powder being prepared by the method. Methanogens in a rumen can reduce carbon dioxide to CH4 by using hydrogen. In a feed formulation of this application, a multi-layer core-coating structure is adopted; lysozyme is added in an outermost coating of a schizochytrium particle; and 4-hydroxy-3-methoxybenzoic acid, D-alloisoleucine, and D-2-aminobutyric acid are added in an intermediate coating to inhibit growth of Methanobrevibacter and Methanomicrobium, regulate microbial community structures, promote microbial community metabolism in the rumen to shift toward a propionic acid pathway, reduce the amount of acetic acid and an acetate-to-propionate ratio, promote digestion, and increase the VFA fermentation yield and the amount of propionic acid, thereby reducing methane emissions and promoting absorption of various nutrients of schizochytrium without affecting the fermentation effect of the microbial community. When put in long-term use, the feed formulation can significantly increase the content of nutrients such as DHA in milk.