Buried Underdrain Water Purification System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current water purification methods are inefficient and costly, particularly in meeting the increasing global demand for purified water for drinking and industrial applications, such as cooling power plants, and often fail to effectively remove organic and inorganic contaminants like bacteria, viruses, and turbidity from seawater.
Innovation Solution
A water purification system involving an underdrain buried under a filter media bed in a natural body of water, which uses a complex biological matrix filter to proliferate on top of the bed, removing contaminants through metabolization and mechanical filtration, and is combined with a reverse osmosis system for desalination, allowing for efficient and cost-effective production of purified water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional water purification methods are used, then water can be purified to some extent, but the process is inefficient and costly while failing to effectively remove organic and inorganic contaminants
Solution Approach 1:
The purification system is divided into distinct functional zones: an upper filter media bed for mechanical filtration, a middle biological matrix zone for metabolization of organic contaminants, and a lower collection zone. This segmentation allows each layer to specialize in removing specific types of contaminants, improving overall effectiveness while maintaining efficient throughput.
Solution Approach 2:
A biological matrix acts as an intermediary layer between the mechanical filter media and the collected purified water. This biological layer metabolizes organic contaminants that pass through the mechanical filtration, providing an additional purification mechanism that addresses the inadequacy of conventional single-stage methods.
2Reliability
If conventional water purification methods are used, then some purification is achieved, but the cost is high
Solution Approach 1:
The biological matrix in the filter bed performs self-maintenance by metabolizing organic contaminants and regenerating itself over time. This reduces the need for expensive chemical treatments and frequent manual maintenance, lowering operational costs while maintaining high purification effectiveness.
Solution Approach 2:
The system changes the physical parameters of the filter bed by allowing biological colonization of the media surface. This transformation from purely mechanical filtration to a combined biological-mechanical system achieves superior contaminant removal at lower cost by utilizing natural biological processes instead of expensive chemical or high-tech physical methods.
3Stability of the object's composition
If the filter media bed is placed at shallow depth, then wave motion and tidal action disturb the bed, but placing it at greater depth protects the bed while increasing construction complexity
Solution Approach 1:
The filter media bed is positioned at a specific depth where the energy from wave motion and tidal action is significantly reduced, creating an equipotential zone of stability. This depth optimization balances the protection of the biological matrix from disturbance with reasonable construction requirements, avoiding both shallow placement instability and excessive depth 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
The system effectively removes organic and inorganic contaminants, achieving low turbidity levels and providing a reliable method for producing purified water, addressing the inefficiencies and high costs of existing technologies while meeting the growing demand for purified water.
Implementation Method 1
a complex biological matrix filter to proliferate on top of the filter media bed forming a portion of the floor of the body of the water... removing contaminants through metabolization
Implementation Method 2
removing contaminants through metabolization and mechanical filtration
Implementation Method 3
reverse osmosis seawater desalination operation
Data Source
AI summary
The disclosed methods and systems of water purification relate to burying an underdrain in situ under a filter media bed such as a particulate material bed, within a natural body of water. A pump is provided for withdrawing water from the underdrain at a sufficient rate to cause a complex biological matrix filter to proliferate on top of the filter media bed forming a portion of the floor of the body of the water. The filter media bed is positioned at a depth d of water between the water body surface and the water body floor so that the upper surface of the particulate material bed remains substantially undisturbed by wave motion or tidal action at the surface of the body of water to facilitate the proliferation of the biological matrix filter.