Nutrient-Binding Composition for Moving Water
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Solution Overview
Problem
Current nutrient-binding compositions for aquatic environments face inefficiencies due to variable water conditions and high costs, with many materials not effectively removing nutrients or contributing to nutrient release, especially in moving bodies of water.
Innovation Solution
A nutrient-binding composition comprising a synergistic combination of nutrient-binding ingredients such as activated alumina and biogenic additives like diatomaceous earth or bivalve shells, which enhances nutrient removal capacity beyond the additive effects of individual components, improving hydraulic conductivity and retention efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional nutrient-binding materials (calcium or magnesium-based PSMs) are used, then phosphorus removal is achieved, but retention time requirements increase and effectiveness decreases at higher pH levels
Solution Approach 1:
The patent changes the chemical composition parameters of the PSM by incorporating iron-based materials (such as iron oxide, iron hydroxide, or ferrihydrite) alongside calcium or magnesium-based materials. This compositional parameter change enables the system to maintain effective phosphorus removal at higher pH levels and reduces the retention time required, as iron-based materials have higher affinity for phosphorus binding compared to calcium or magnesium-based materials alone.
2Productivity
If iron-based PSMs are used, then cumulative phosphorus removal efficiency increases, but performance decreases at higher pH levels and low dissolved oxygen conditions
Solution Approach 1:
The patent creates a composite PSM material that combines iron-based components (providing high phosphorus binding affinity and cumulative removal efficiency) with calcium or magnesium-based components and biogenic additives (providing stability across varying pH and dissolved oxygen conditions). This composite structure allows the system to maintain reliable performance under diverse water conditions while preserving the high productivity of iron-based materials.
Solution Approach 2:
The biogenic additives (such as shell material, bone meal, or other organic materials) act as intermediaries that moderate the performance of iron-based materials under challenging conditions. These additives provide buffering capacity and stability, enabling the iron-based components to function effectively at higher pH levels and in low dissolved oxygen environments without sacrificing their high phosphorus removal efficiency.
3Loss of time
If PSMs with smaller particle size are used, then retention time increases, but hydraulic conductivity decreases causing water flow backups
Solution Approach 1:
The patent formulates a composite PSM with a multi-component structure where fine particles (providing high surface area and retention time) are combined with coarser biogenic additive particles (maintaining hydraulic conductivity). This composite particle size distribution allows water to flow through the system without backups while still achieving adequate retention time for phosphorus binding, as the finer nutrient-binding particles are distributed within a matrix of coarser structural particles.
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 composition achieves a nutrient removal capacity at least two times greater than the additive capacity of individual components, effectively addressing nutrient pollution in both stagnant and moving bodies of water, while maintaining hydraulic conductivity and reducing nutrient diffusion from sediments.
Implementation Method 1
nutrient-binding ingredient and at least one functional additive, such as a biogenic additive, that promotes sequestration of nutrients
Implementation Method 2
biogenic additive, that promotes sequestration of nutrients and/or water quality enhancement in aquatic environments
Implementation Method 3
reducing nutrient diffusion from sediments
Data Source
AI summary
Some embodiments advantageously provide methods of binding nutrients from a body of water with nutrient-binding compositions that include ingredients that have a synergistic effect such that the nutrient-binding composition is capable of removing more nutrients that the individual ingredients added together. In one embodiment, a nutrient-binding composition comprises: a first amount of a nutrient-binding ingredient; and a second amount of a biogenic additive, the first amount being greater than or equal to the second amount. In one aspect of the embodiment, the nutrient-binding composition has a greater nutrient removal capacity from a volume of water than an additive nutrient removal capacity of the first amount of nutrient-binding ingredient and the second amount of biogenic added together.