Fish Feed Phytase Dosing to Reduce Phosphorus Excretion
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Solution Overview
Problem
Existing animal feeds, particularly for monogastric animals like pigs, poultry, and fish, result in significant phosphorus excretion due to the inability to absorb phytate, leading to environmental pollution and increased costs from adding inorganic phosphate to compensate for phosphate deficits.
Innovation Solution
A fish feed or feed additive containing polypeptides with phytase activity, dosed at least 10% less than the maximum for growth response, to hydrolyze phytate and reduce phosphorus secretion and excretion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maximum dose of phytase activity is added to fish feed for maximum growth response, then fish growth performance is improved, but phosphorus excretion remains significant
Solution Approach 1:
The patent applies parameter changes by optimizing the phytase activity dosage to a specific range (500-2000 FYT/kg feed) rather than using maximum doses. This parameter optimization resolves the contradiction by finding the dose level that achieves sufficient phosphorus release for growth while minimizing excess phosphorus excretion into the environment.
2Reliability
If inorganic phosphate is added to animal feed to compensate for phosphate deficit, then animal growth and health are ensured, but environmental burden and feed costs increase
Solution Approach 1:
The patent applies self-service by enabling the animal's own digestive system to release phosphorus from phytate through phytase enzyme activity. This eliminates the need to add inorganic phosphate supplements, thereby ensuring animal growth and health requirements are met through the animal's own metabolic processes rather than external additives.
Solution Approach 2:
The patent uses phytase enzyme as an intermediary substance that facilitates phosphorus release from phytate. This intermediary enables the conversion of indigestible phytate-bound phosphorus into absorbable forms, replacing the need for direct inorganic phosphate addition while maintaining animal health and growth.
3Reliability
If inorganic phosphate is added to animal feed to compensate for phosphate deficit, then animal growth and health are ensured, but feed costs increase
Solution Approach 1:
The patent applies self-service by enabling the animal's own digestive system to release phosphorus from phytate through phytase enzyme activity. This eliminates the need to add inorganic phosphate supplements, thereby ensuring animal growth and health requirements are met through the animal's own metabolic processes rather than external additives.
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
Significantly reduces phosphorus excretion by fish, improving environmental sustainability and reducing feed costs by minimizing the use of inorganic phosphate additives.
Implementation Method 1
By using a phytase in animal feeds, the phytate is hydrolyzed to substrates which the animal can utilise.
Implementation Method 2
a fish feed or fish feed additive comprising one or more polypeptides having a phytase activity
Data Source
AI summary
The present invention relates to a fish feed or fish feed additive comprising one or more polypeptides having a phytase activity, wherein said phytase activity comprising EC: 3.1.3.26 (i.e., 4-phytase) and/or EC 3.1.3.8 (i.e., 3-phytase) and/or EC 3.1.3.72 (i.e., 5-phytase) phytase activity, wherein said phytase activity is dosed at a level which is at least 10% less than a efficient (e.g., optimal) dose of phytase activity configured for maximum fish growth response. The present invention relates to a method for reducing phosphorus secretion and/or excretion by a fish, said method comprising: administering the animal feed or animal feed additive according to any one of preceding claims.