Microfluidic Filtration Device for Microplastic Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for filtering microplastics from water are inefficient, costly, and difficult to implement on an industrial scale, lacking a standardized approach to effectively separate microplastics from large volumes of water.
Innovation Solution
A fluidic filtration device with a network of microfluidic channels, surface modifiers, and a hydrodynamic resistance balancing structure that directs particles towards concentration channels, increasing particle concentration while preventing them from entering filtered fluid outlets, and a system for collecting and processing the filtered fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional filtration methods are used to separate microplastics from water, then filtration can be performed, but the equipment cost is high, the separation time is long, and the system is difficult to implement on an industrial scale
Solution Approach 1:
The filtration system is divided into multiple serial filtration units, each containing segmented channels with progressively smaller cross-sectional areas. This segmentation allows the system to handle large volumes of water while progressively concentrating particles, achieving high filtration efficiency without requiring a single complex high-capacity filter.
Solution Approach 2:
The patent transitions from traditional horizontal filtration systems to a vertical arrangement of filtration units stacked one above another. This dimensional change allows multiple filtration stages to be compactly arranged, reducing the horizontal footprint while maintaining high productivity, and enables gravity-assisted fluid flow between stages.
2Reliability
If conventional filtration methods are used, then particle separation can be achieved, but the equipment cost and operational cost are high
Solution Approach 1:
The patent employs hydraulic principles by using gravity-driven fluid flow between vertically stacked filtration units. The liquid phase flows naturally from upper to lower units through controlled openings, eliminating the need for expensive pumps or pressurization systems while maintaining reliable particle separation effectiveness.
Solution Approach 2:
The filtration units feature progressively changing geometric parameters, with each subsequent unit having a smaller channel cross-sectional area. This parameter progression naturally concentrates particles as fluid flows through the series, achieving reliable separation without requiring additional energy input or complex control mechanisms.
3Reliability
If conventional filtration methods are used, then microplastics can be removed from water, but the separation process takes a long time
Solution Approach 1:
The serial arrangement of multiple filtration units operating in series allows continuous particle concentration throughout the fluid path. As liquid flows continuously from one unit to the next, particles are progressively concentrated without interruption, significantly reducing the total separation time while maintaining high filtration effectiveness.
Solution Approach 2:
Earlier filtration units perform preliminary particle concentration, removing bulk particles before the fluid reaches subsequent units. This preliminary action in each stage reduces the particle load for downstream units, enabling the system to process large volumes quickly while maintaining high removal efficiency.
4Quantity of substance
If conventional filtration methods are used, then particle removal can be achieved, but it is difficult to implement on an industrial scale for large volumes of water
Solution Approach 1:
The system segments the large-volume treatment task into multiple parallelizable filtration units. Each unit handles a portion of the flow, and additional units can be added in series or parallel to increase capacity, making the system easily scalable for industrial applications without requiring a single oversized complex filter.
Solution Approach 2:
By stacking filtration units vertically, the system increases water treatment capacity in the vertical dimension rather than requiring expansive horizontal space. This allows industrial-scale capacity to be achieved in a compact footprint, improving ease of operation and deployment at industrial sites.
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 device effectively collects at least 10% by weight of particles with a volume of 4.10−2 to 7.10−9 m3, achieving efficient filtration and particle concentration, and can handle large volumes of water with reduced operational costs and complexity.
Implementation Method 1
The device comprises a hydrodynamic resistance balancing structure configured so that the hydrodynamic resistance of each of the filtered fluid collection channels depends solely on the hydrodynamic resistance and the ratio a between the volume of filtered fluid and the volume of particle concentrate
Implementation Method 2
a hydrodynamic resistance balancing structure, configured so that the hydrodynamic resistance of each of the filtered fluid collection channels Ri depends solely on the hydrodynamic resistance R1 and the ratio a between the volume of filtered fluid and the volume of particle concentrate at the outlet of each of the particle concentration channels
Data Source
AI summary
A fluidic filtering device designed to filter at least one particle from a fluid, including at least one network of microfluidic channels, the at least one network including: —a main inlet for fluid to be filtered; —a main particle concentrate outlet; —a plurality of filtered-fluid outlets; —a plurality of particle positioning channels; —a plurality of particle concentration channels; —a plurality of filtered-fluid collection channels; —a hydrodynamic resistance balancing structure configured in such a way that the hydrodynamic resistance of each of the filtered-fluid collection channels is defined by a hydrodynamic resistance of the balancing structure and a ratio a between the filtered-fluid volume and the particle concentrate volume at the outlet of each particle concentration channel.