Digestate-Based Hydroseeding Substrate for Sustainable Plant Propagation
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Solution Overview
Problem
Existing agricultural and horticultural materials, such as peat moss and wood mulch, pose environmental concerns due to non-renewability and unsustainable harvesting, while traditional manure use in fertilizers leads to issues like nutrient runoff and pathogen transmission, necessitating a sustainable and effective plant propagation medium.
Innovation Solution
A hydroseeding substrate comprising primary solids from anaerobic digesters, bentonite clay, and water-dispersible polymers, and a dissolvable fertilizer package in a polyvinyl alcohol film, offering enhanced nutrient content, erosion control, and reduced environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional materials like peat moss and wood mulch are used, then plant propagation is supported, but environmental sustainability deteriorates due to non-renewability and unsustainable harvesting
Solution Approach 1:
The patent transforms the chemical and physical parameters of animal manure through controlled composting processes, converting harmful raw manure into a stable, nutrient-rich amendment that supports plant growth without the environmental drawbacks of traditional materials
Solution Approach 2:
The patent converts harmful animal waste products into beneficial soil amendments by using them as feedstock for composting, thereby eliminating environmental hazards while creating valuable plant propagation support materials
2Quantity of substance
If raw manure is used as fertilizer, then nutrient content is improved, but environmental harm increases due to nutrient runoff and pathogen transmission
Solution Approach 1:
The patent applies preliminary composting treatment to manure before it is applied to soil, pre-processing the material to stabilize nutrients and eliminate pathogens, thereby preventing subsequent environmental harm from runoff and disease transmission
Solution Approach 2:
The patent introduces composting as an intermediary process between raw manure and soil application, using microbial activity during composting to transform harmful substances into safe, stable forms that provide nutrients without causing environmental damage
3Object-affected harmful factors
If digestate solids are used as plant propagation medium, then environmental sustainability is improved, but manufacturing complexity increases due to processing requirements
Solution Approach 1:
The patent creates a multi-functional product from digestate solids that simultaneously provides erosion control, nutrient delivery, and soil structure improvement, consolidating multiple functions into a single material that simplifies overall application despite processing complexity
Solution Approach 2:
The patent combines digestate solids with other materials to create composite plant propagation mediums that leverage the beneficial properties of each component while mitigating individual weaknesses, thereby managing manufacturing complexity through material synergies
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 solution provides a renewable, lightweight, and pathogen-free medium for plant growth, improving soil structure, water retention, and nutrient availability, while reducing environmental harm and operational costs.
Implementation Method 1
a tube formed from a polyvinyl alcohol film that is 85-90% hydrolyzed, wherein the dried mixture is contained within the tube
Implementation Method 2
a coating of hydroxypropyl methyl cellulose on the sand particles
Implementation Method 3
a cover composition comprising bentonite clay and a water-dispersible polymer or starch
Implementation Method 4
anaerobic digestion has been utilized for waste treatment and energy production for many years. This process involves the breakdown of organic materials by microorganisms in the absence of oxygen, producing biogas and a nutrient-rich byproduct known as digestate
Data Source
AI summary
The present disclosure provides a hydroseeding substrate comprising primary solids from an anaerobic digester, a cover composition comprising bentonite clay and a water-dispersible polymer or starch, and a surface-treated hydroxypropyl methyl cellulose (HPMC). The primary solids may comprise fibrous solids from dairy, poultry, hog, or cattle waste. The water-dispersible polymer may include one or more cellulose derivatives. The surface-treated HPMC may be present in an amount of 0.1 to 20 weight percent of the substrate. The hydroseeding substrate may further include a fertilizer and a soil adjuvant. The disclosure also provides a method of producing a dissolvable fertilizer package and the resulting package, comprising a dried mixture of primary solids from an anaerobic digester and nutrients contained within a tube formed from a polyvinyl alcohol film that is 85-90% hydrolyzed.