Calcium Silicate Hydrate Nanoparticles for Phosphorus Runoff Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Poultry litter amendments like alum no longer effectively reduce soluble phosphorus in runoff, and the use of phytase enzymes in poultry diets further suppresses this reduction, necessitating a new approach to combine ammonia control with phosphorus binding in poultry manure.
Innovation Solution
Combining calcium silicate hydrate nanoparticles with traditional ammonia control materials such as alum or sodium bisulfate to treat poultry litter, creating a synergistic effect that significantly reduces soluble reactive phosphorus in runoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If alum is added to poultry litter to reduce phosphorus runoff, then phosphorus runoff is reduced, but the effectiveness is suppressed when phytase enzymes are used in poultry diets
Solution Approach 1:
The patent combines alum (aluminum sulfate) with calcium silicate hydrate nanoparticles to create a composite litter amendment. This composite material overcomes the limitation of alum alone by providing multiple mechanisms for phosphorus binding: aluminum forms insoluble aluminum phosphate precipitates, while calcium silicate hydrate nanoparticles provide additional adsorption sites and binding capacity, ensuring effective phosphorus runoff reduction even when phytase enzymes are present in the diet
Solution Approach 2:
The patent introduces calcium silicate hydrate nanoparticles to change the chemical parameters of the litter environment. These nanoparticles provide additional binding sites and alter the chemical reactions occurring in the litter, creating new pathways for phosphorus immobilization that are not dependent on the aluminum-phosphate reaction alone, thereby maintaining effectiveness despite the presence of phytase enzymes
2Object-generated harmful factors
If alum is added to poultry litter, then ammonia emissions are reduced, but phosphorus runoff reduction becomes less effective
Solution Approach 1:
The patent merges the ammonia control function of alum with the phosphorus binding capacity of calcium silicate hydrate nanoparticles into a single litter amendment application. This combination allows the system to simultaneously achieve both ammonia emission reduction (through alum's acidification effect) and phosphorus runoff reduction (through both aluminum phosphate precipitation and nanoparticle adsorption), resolving the trade-off between these two functions
3Object-generated harmful factors
If traditional ammonia control materials are used alone, then ammonia emissions are controlled, but phosphorus binding capacity is insufficient
Solution Approach 1:
The patent creates a composite material combining traditional ammonia control agents (alum or sodium bisulfate) with calcium silicate hydrate nanoparticles. This composite provides dual functionality: the traditional material controls ammonia emissions through pH adjustment, while the nanoparticles contribute significant phosphorus binding capacity through adsorption and precipitation mechanisms, achieving both objectives simultaneously
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 combination of calcium silicate hydrate nanoparticles with ammonia control materials like alum or sodium bisulfate achieves a substantial reduction in soluble reactive phosphorus, outperforming either component alone in reducing phosphorus runoff and leaching from fields fertilized with poultry litter.
Implementation Method 1
combining calcium silicate hydrate, preferably in a nanoparticle form, with traditional ammonia control products... binds with phosphorus and reduces the amount of soluble reactive phosphorus
Implementation Method 2
When alum is added to manure it acidifies the litter, thus lowering litter pH, which shifts the ammonia (NH3)/ammonium (NH4+) equilibria towards ammonium
Implementation Method 3
the aluminum is converted to aluminum hydroxide—which reacts with phytate to make an aluminum phytate mineral which is not soluble
Data Source
AI summary
Calcium silicate hydrate nanoparticles are combined with ammonia control materials (e.g. alum, aluminum chloride, ferric chloride, ferric sulfate, and/or sodium bisulfate) to create a phosphorus-binding composition. In the preferred embodiment, the composition is applied to poultry litter, poultry bedding or other non-aqueous substrates that are at least partially comprised of animal manure. The composition binds with phosphorus to at least reduce the amount of phosphorus in runoff water or in leachate from fields fertilized with treated manure. The combining of the calcium silicate hydrate nanoparticles with the ammonia control products has a surprising and unexpected result. The calcium silicate hydrate-ammonia control material mix reduces soluble phosphorus more than either component of the mix alone.