MMVF Buffer Layer for Passive Storm Water Filtration and Irrigation
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Solution Overview
Problem
Urban areas face challenges in balancing water usage throughout the year, experiencing excess flooding during high precipitation and water scarcity during droughts. Existing irrigation systems require active watering, leading to inefficiencies and increased labor costs.
Innovation Solution
A plant growth system comprising a layer of buffer material made from man-made vitreous fibres (MMVF) and a plant growth layer, which absorbs excess storm water to prevent flooding and provides water to plants as needed, reducing water consumption. The system filters storm water to remove particulate matter and impurities before use in irrigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If storm water is stored in traditional water infiltration systems, then flooding is prevented, but water is not available for plant irrigation during drought periods
Solution Approach 1:
A buffer layer made of porous material is introduced as an intermediary between the water impermeable surface and the plant growth substrate. This buffer layer mediates water transfer through capillary action, allowing water to move from the storage reservoir to the plant roots without requiring active pumping or irrigation infrastructure.
Solution Approach 2:
The patent replaces mechanical irrigation systems (pumps, pipes, active watering) with passive capillary action. The porous buffer layer naturally draws water upward through capillary forces, eliminating the need for mechanical energy input while ensuring continuous water supply to plants.
2Reliability
If clean water is used for irrigation during drought, then plant growth is maintained, but water consumption increases
Solution Approach 1:
The system recovers water that would otherwise be discarded during storm events. By capturing and storing excess storm water in the reservoir beneath the buffer layer, the system makes this water available for later use during drought periods, effectively recovering a resource that would normally be lost to drainage.
Solution Approach 2:
The storm water management system serves multiple functions: it prevents flooding during high precipitation events, filters water through the buffer layer, stores water for later use, and provides passive irrigation during drought periods. This multi-functionality eliminates the need for separate irrigation infrastructure.
3Quantity of substance
If active irrigation systems are installed, then water can be provided to green spaces, but labor and maintenance costs increase
Solution Approach 1:
The irrigation system is self-service in that it automatically provides water to plants through passive capillary action without requiring human intervention. The buffer layer continuously draws water from the reservoir and delivers it to plant roots, eliminating the need for manual watering or active irrigation system management.
4Quantity of substance
If storm water is used directly for irrigation, then water availability increases, but particulate matter and impurities harm plant growth
Solution Approach 1:
The buffer layer is constructed from porous material that physically filters storm water as it percolates through. The porous structure traps particulate matter and impurities while allowing water to pass through via capillary action, providing both filtration and water delivery functions in a single component.
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 system achieves better water balance in urban areas by storing precipitation water in the buffer layer during wet periods and releasing it to the plant growth layer during dry periods, reducing the need for active irrigation and minimizing labor and water costs.
Implementation Method 1
The capillary action of the man-made vitreous fibre (MMVF) buffer layer, in combination with the buffer layer being positioned on a water impermeable surface, means that water moves upwards to the plant growth substrate layer above
Implementation Method 2
the presence of a second void space and outlet, configured so that water entering the first void space through the inlet must pass through the layer of buffer material before it enters the second void space and then exit the system through the outlet, means that water provide to the plant growth substrate layer and water that exits the system through the outlet is filtered and free from particulate matter and other detritus and impurities
Data Source
AI summary
The disclosure relates to a plant growth system (1) comprising: ·—a water impermeable container (2) having a base and side walls, wherein the water impermeable container comprises within: ·(i) a layer of buffer material (3) for absorbing storm water and; ·(ii) a first void space (4); wherein the layer of buffer material has a first side surface, a second side surface and a bottom surface, wherein the bottom surface of the layer of buffer material is in direct contact with the base of the water impermeable container and wherein the buffer material comprises man-made vitreous fibres (MMVF) bonded with a cured binder composition wherein the first void space is in fluid communication with the first side surface of the layer of buffer material; ·—an inlet (5) for water to enter the first void space of the water impermeable container; ·—a plant growth substrate layer (6), positioned above the layer of buffer material and in fluid communication with the layer of buffer material.