Colloidal Phosphate Fertilizer Balancing Runoff and Plant Bioavailability
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Solution Overview
Problem
Conventional phosphate fertilizers cause environmental issues due to high water solubility leading to phosphate run-off, contributing to eutrophication and pipe clogging, while insoluble forms like struvite are not effectively utilized in liquid applications.
Innovation Solution
A colloidal phosphate fertilizer with colloidal particles of size distribution less than 60 microns and magnesium:nitrogen:phosphorus ratio of 1:0-3:0.5-3, formulated to minimize run-off and enhance bioavailability, produced as a concentrate or powder for easy application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If highly water-soluble phosphate fertilizers are used to ensure plant absorption, then plant bioavailability is improved, but phosphate run-off into bodies of water increases causing eutrophication
Solution Approach 1:
The patent changes the physical state of phosphate from fully soluble to colloidal suspension with controlled particle size (0.1-100 microns). This parameter change allows the fertilizer to remain suspended in water for plant absorption while limiting complete dissolution that causes run-off. The colloidal particles provide a intermediate state between soluble and insoluble, achieving both bioavailability and reduced environmental harm.
Solution Approach 2:
The patent creates a composite fertilizer system combining colloidal phosphate particles with water-soluble fertilizer components. This composite approach allows the colloidal particles to provide slow-release phosphate while the soluble components ensure immediate plant availability, achieving a balance between rapid absorption and reduced run-off.
2Object-generated harmful factors
If insoluble phosphate fertilizers like struvite are used to limit phosphate run-off, then environmental impact is reduced, but plant absorption and liquid application effectiveness decrease
Solution Approach 1:
The patent transforms insoluble struvite into colloidal suspension with controlled particle size (0.1-100 microns). This parameter change maintains the low solubility that prevents run-off while creating a suspension that remains available to plants through slow dissolution. The colloidal form allows liquid application while preserving the run-off prevention benefits of insolubility.
3Object-generated harmful factors
If colloidal phosphate suspension is applied to reduce run-off, then phosphate run-off is limited, but the complexity of formulation and scaling production increases
Solution Approach 1:
The patent segments the colloidal suspension into discrete particle size classes (0.1-100 microns) that can be produced through standardized processes. This segmentation allows for simplified production scaling while maintaining the run-off prevention benefits. The segmented approach enables use of conventional equipment and processes rather than requiring complex specialized systems.
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 colloidal fertilizer significantly reduces phosphate run-off and enhances plant bioavailability, promoting growth while minimizing environmental impact and pipe clogging.
Implementation Method 1
A fertilizer composition is provided that includes an aqueous solution and colloidal particles suspended in the aqueous solution
Implementation Method 2
The colloidal particles have a size distribution in which 95 number percent of the colloidal particles are less than 60 microns and have at atomic number ratio of magnesium:nitrogen:phosphorus of 1:0-3:0.5-3
Data Source
AI summary
A fertilizer is provided that promotes plant growth with limited phosphate run-off. The fertilizer has reduced run-off even when compared to a phosphorus normalized application of struvite. The fertilizer is based on suspended colloidal particles in aqueous solution. The colloidal particles have a size distribution in which 95 percent of the colloidal particles are less than 60 microns and have an atomic number ratio of magnesium:nitrogen:phosphorus of 1:0-3:0.5-3. The colloidal particles are heterogeneous and include domains of only struvite, or of struvite in combination with domains of pyrophosphate species, poly phosphate species, or combinations thereof. The fertilizer composition is formulated to include additional components while still retaining colloidal suspension storage stability. The colloidal particles are produced from concentrated solutions that facilitate industrial scale production. The colloidal particles promote bioavailability through root acid phosphatases activation of insoluble phosphorus species. The colloid domain size facilitates access and soil intercalation over run-off mechanisms.