Microbial Coating Structure for Room-Temperature Stable Organic Fertilizer
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Solution Overview
Problem
Existing microorganism-coated organic fertilizers suffer from rapid microorganism content decrease when stored at room temperature, leading to reduced effectiveness and stability.
Innovation Solution
A microbial coating layer covering 90% or more of the organic fertilizer surface with a maximum thickness of 25% or less, containing at least 1/20 of the microorganism content, is formed by spraying and drying a microbial culture solution during the preparation process, using a cylindrical rotating housing with controlled moisture and hot air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a microbial coating layer is formed by spraying and drying a microbial culture solution on the organic fertilizer surface, then the mechanical strength of the organic fertilizer is improved, but the microorganism content in the organic fertilizer rapidly decreases when stored at room temperature for a long time
Solution Approach 1:
The patent applies local quality by creating a microbial coating layer with specific thickness (25 µm or less) that covers 90% or more of the organic fertilizer surface. This localized microbial distribution provides mechanical strength where needed while maintaining storage stability by preventing excessive microbial penetration into the fertilizer core, thus resolving the contradiction between improved mechanical strength and maintained storage stability.
2Strength
If microorganisms are distributed only on the organic fertilizer surface, then the mechanical strength is improved, but the microorganism content decreases rapidly during long-term room temperature storage
Solution Approach 1:
The patent applies parameter changes by precisely controlling the microbial coating layer thickness to 25 µm or less and ensuring it covers 90% or more of the surface area. These specific parameter thresholds optimize the balance between mechanical strength (improved by coating) and storage duration (maintained by limiting coating thickness), resolving the contradiction between these two properties.
3Quantity of substance
If the microbial coating layer thickness is increased, then more microorganisms are present on the surface, but the organic fertilizer is damaged during drying and cooling process
Solution Approach 1:
The patent applies partial action by forming a microbial coating layer that covers 90% or more of the surface area but limits the thickness to 25 µm or less. This partial coverage approach provides sufficient microbial presence for functionality while avoiding excessive thickness that would cause structural damage during drying and cooling, thus resolving the contradiction between microorganism content and structural integrity.
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 microorganism-coated organic fertilizer maintains a stable microorganism content during long-term storage at room temperature, enhancing crop growth and soil fermentation rates.
Implementation Method 1
forming a microbial coating layer on the surface of organic fertilizer by spraying and drying a microbial culture solution on the organic fertilizer surface
Implementation Method 2
supplying hot air to the inside of the cylindrical rotating housing
Data Source
AI summary
Disclosed are a microorganism-coated organic fertilizer including an organic fertilizer and a microbial coating layer, which covers 90 area % or more of the surface of the organic fertilizer, wherein the maximum thickness of the microbial coating layer is 25% or less of the thickness of the microorganism-coated organic fertilizer and the content of microorganisms in the organic fertilizer is 1/20 or more of the content of microorganisms in the microorganism-coated organic fertilizer, and a method of preparing the same.