Extruded Fish Fodder Mineral Supplementation for High CO2 Environments
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Solution Overview
Problem
Intensive fish rearing in freshwater environments, particularly for salmon and trout, faces challenges due to high CO2 levels in water, leading to respiratory acidosis and negative impacts on growth and health, as existing fish fodder mineral content is inadequate to counteract these conditions.
Innovation Solution
An extruded fish fodder with an increased mineral content, specifically phosphate, potassium, calcium, sodium, and magnesium, beyond standard levels, is formulated to enhance the growth of freshwater fish, using inert materials like Diamol® to maintain nutritional equivalence and buffer against high CO2 levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fish density in rearing tanks is increased to meet demand, then productivity is improved, but CO2 levels in water increase dramatically causing respiratory acidosis and negative impacts on fish growth and health
Solution Approach 1:
The patent changes the chemical composition parameters of the fish fodder by increasing the mineral content (phosphate, potassium, calcium, sodium, magnesium) beyond standard levels. This parameter change in the fodder composition allows fish to better counteract the harmful effects of high CO2 levels in the water, enabling higher fish density without proportionate health deterioration.
2Ease of manufacture
If standard mineral content in fish fodder is used, then manufacturing simplicity is maintained, but fish growth is insufficient under high CO2 conditions
Solution Approach 1:
The patent modifies the mineral content parameters of the fodder by increasing phosphate, potassium, calcium, sodium, and magnesium beyond standard levels. This enhanced mineral composition directly addresses the physiological stress caused by high CO2 levels, thereby improving fish growth and productivity while remaining compatible with existing extruded fodder manufacturing processes.
3Adaptability or versatility
If fish are reared in freshwater with low buffer quality, then water source availability is improved, but CO2 content increases dramatically affecting fish health and growth
Solution Approach 1:
The enhanced mineral content in the fodder acts as an intermediary substance that mediates between the harmful high CO2 levels in the water and the fish physiology. The increased minerals (particularly phosphate and calcium) help buffer the acidic effects of CO2 in the fish blood, allowing fish to tolerate high CO2 environments better.
Solution Approach 2:
The patent changes the nutritional parameters of the fodder by increasing mineral content, which enables fish to adapt to low buffer quality freshwater environments. This parameter change allows the fish to maintain physiological balance even when the water quality is poor and CO2 levels are high.
Data Source
AI summary
A rearing fodder of extruded fodder type, comprising proteins, fats and carbohydrates, for freshwater fish, wherein the fish is larger than 2 grams, and wherein the freshwater has a content of CO2 being above 5 milligrams/liter, wherein the fodder has an increased content of at least one of the minerals: phosphate (P), potassium (K), calcium (Ca), sodium (Na) and magnesium (Mg) beyond what exists naturally in the used protein raw materials, fat raw materials and carbohydrate raw materials, wherein the collective amount of minerals in the extruded fodder is at least 10%, on a dry substance basis, of the total weight of the fodder, and wherein one or more of the minerals phosphate (P), potassium (K), calcium (Ca), sodium (Na) and magnesium (Mg) is/are added beyond what exist in the used protein raw materials, fat raw materials and carbohydrate raw materials.