Lignocellulosic Soil Agent for Aggregate Stability
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Solution Overview
Problem
Existing soil improving agents fail to effectively reduce fine soil particles and enhance soil stability and crushing performance during tilling, which are crucial for efficient agricultural practices.
Innovation Solution
A soil improving agent containing lignocellulosic biomass with a lignin content of 60-80% is developed, which undergoes a hydrophilization treatment to improve its affinity and aggregation properties, allowing for better soil structure and tilling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional soil improving agents are used, then soil aggregation is promoted, but fine soil particles are not effectively reduced and soil stability is insufficient
Solution Approach 1:
The patent applies parameter changes by controlling the lignin content to be 60-80% and the contact angle with water to be 50° or less, transforming the physical and chemical properties of the biomass material to achieve both fine particle reduction and soil stability improvement
Solution Approach 2:
The patent utilizes the porous structure of lignocellulosic biomass materials to absorb fine soil particles and promote aggregation, where the porous structure provides surface area for particle attachment and water retention
2Stability of the object's composition
If soil improving agents are applied to enhance soil structure, then aggregation is improved, but crushing performance during tilling does not improve
Solution Approach 1:
The patent changes the contact angle parameter to 50° or less, which modifies the surface properties of the biomass material to reduce soil adhesion during tilling while maintaining aggregation stability, thereby improving crushing performance
Solution Approach 2:
The patent uses lignocellulosic biomass with specific lignin content (60-80%) as a composite material that combines the benefits of organic matter for aggregation with controlled surface properties for improved tilling characteristics
3Quantity of substance
If biomass material is used to promote soil aggregation, then water retention is improved, but water resistance of soil aggregates is insufficient
Solution Approach 1:
The patent applies parameter changes by controlling both the contact angle (≤50°) and lignin content (60-80%), which creates a balanced material that retains water effectively while forming aggregates with sufficient water resistance for agricultural use
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 agent effectively reduces fine soil particles, enhances soil stability, and improves crushing performance during tilling, making it suitable for agricultural applications by forming stable soil aggregates with improved water resistance.
Implementation Method 1
the agent is made of a raw material plant-based material including 50 weight % or more of bark... expanding its volume 2 to 100 times when absorbing water
Implementation Method 2
forming stable soil aggregates with improved water resistance
Implementation Method 3
undergoes a hydrophilization treatment to improve its affinity and aggregation properties
Implementation Method 4
a lignin decomposition product having an aldehyde yield by alkaline nitrobenzene oxidation of 5% by mass or more
Implementation Method 5
lignin decomposition product having a weight average molecular weight of 300 or more and 100,000 or less
Data Source
AI summary
A soil improving agent containing (A) a lignocellulosic biomass with a lignin content of more than 60 mass % and 80 mass % or less.