Larval Displacement System for Organic Fertilizer Production
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Solution Overview
Problem
Existing systems for producing organic fertilizer and feed from animal excreta using insect larvae face challenges such as manual handling in poor working conditions, inefficient food supply, and slow growth due to inadequate breeding volume and food availability, leading to prolonged processing times and increased labor costs.
Innovation Solution
A system with multiple nurturing-processing storage units that allows for forced displacement of larvae at predetermined times, ensuring sufficient food supply and breeding area, reducing manual handling, and utilizing methods like light irradiation, oxygen reduction, or heating to facilitate larval growth and separation from organic fertilizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual handling is used for deposition of eggs, hatching, growing of larvae, and loading/unloading of containers, then the system can be simple in structure, but the working environment becomes extremely poor and labor-intensive
Solution Approach 1:
The system enables automatic egg deposition by houseflies on excreta in containers without manual intervention. The houseflies naturally perform the egg-laying function, eliminating the need for manual egg deposition while maintaining system simplicity
Solution Approach 2:
Manual mechanical handling operations are replaced by utilizing the natural behavior of houseflies for egg deposition and larval growth processes. The system leverages biological processes instead of mechanical intervention to improve working conditions
2Productivity
If larvae are nurtured in sufficient breeding volume with adequate food supply, then larval growth and processing efficiency improve, but the system requires multiple nurturing-processing storage units increasing device complexity
Solution Approach 1:
The system divides the nurturing process into multiple stages using separate nurturing-processing storage units. Each unit handles specific growth phases of larvae, allowing optimized conditions for each stage and enabling continuous processing without overwhelming a single container
Solution Approach 2:
The system transitions from horizontal expansion to vertical stacking by arranging nurturing-processing storage units in multiple levels. This three-dimensional arrangement provides sufficient breeding volume and food supply capacity while optimizing space utilization
3Device complexity
If larvae are allowed to grow naturally without forced displacement, then the system operates simply, but processing time increases and labor costs rise
Solution Approach 1:
The system implements dynamic control of larval growth by forcing displacement at predetermined time points. This allows the system to transition between natural growth phases and active management phases, optimizing both processing time and operational simplicity
Solution Approach 2:
The system applies periodic forced displacement operations at predetermined intervals during larval development. This rhythmic intervention accelerates the processing cycle by synchronizing larval transfer with optimal growth stages, reducing overall processing time while maintaining manageable operation complexity
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
This system enables efficient production of organic fertilizer and feed with reduced labor, faster processing times, and improved larval growth, producing high-quality organic fertilizer with antibacterial properties and chitosan content suitable for soil improvement and plant growth promotion.
Implementation Method 1
excreta are decomposed with enzyme within larvae bodies during larvae are nurtured in each nurturing-processing storage unit
Implementation Method 2
utilizing methods like light irradiation, oxygen reduction, or heating to facilitate larval growth and separation from organic fertilizer
Data Source
AI summary
This invention provides a system for producing organic fertilizer from excreta of domestic animal obtained by digesting of larvae belonging to Diptera such as Musca domestica (housefly), Boettcherisca peregrine and Tabanus, and for producing grown larvae which can be used as a feed for cultured fish and chicken raising. In an embodiment, the system for producing organic fertilizer from excreta of domestic animal and for producing grown larvae which can be used as a feed for cultured fish and chicken raising is characterized by arranging a plurality of nurturing-processing storage units for nurturing larvae hatched from eggs, and a means for dislodging only larvae forcibly from a former nurturing-processing storage unit to a later nurturing-processing storage unit successively with the progress of growth of larvae, wherein larvae leave said former nurturing-processing storage unit autonomously.