Countercurrent Adsorption Filter for Micropollutant Removal
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Solution Overview
Problem
Current water purification methods, such as advanced oxidation processes, membrane-based filter plants, and conventional activated carbon systems, are inefficient and costly, with issues like high energy consumption, complex maintenance, biological growth, and limited selectivity, leading to inadequate removal of microcontaminants like pharmaceuticals and industrial chemicals from wastewater and drinking water.
Innovation Solution
A countercurrent filter apparatus with a continuous regeneration system, where water and adsorption material flow in opposite directions, allowing for continuous exchange and regeneration of adsorption material, enhancing filter efficiency and extending operating times while reducing costs and space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional activated carbon systems are used for water purification, then adsorption of contaminants occurs, but the service life is limited and regeneration is difficult
Solution Approach 1:
The patent inverts the conventional filtration approach by implementing countercurrent flow where water flows upward through the adsorption bed while spent adsorption material is removed from the bottom and fresh material is added at the top. This inversion enables continuous operation and simplifies regeneration by allowing spent material to be easily extracted and replaced without shutting down the system
Solution Approach 2:
The patent achieves continuous purification by maintaining a multi-layer adsorption bed where fresh, spent, and regenerating layers coexist. Water continuously passes through the fresh and partially spent layers while the spent layer is continuously removed and replaced, eliminating downtime and maintaining uninterrupted contaminant removal
2Reliability
If advanced oxidation processes are used, then microcontaminants are removed, but energy consumption is high
Solution Approach 1:
The patent replaces energy-intensive advanced oxidation processes with a mechanical/physical adsorption system using activated carbon or similar materials. The countercurrent flow mechanism enables highly efficient contaminant removal through adsorption without requiring high energy input, achieving reliable microcontaminant removal through mass transfer rather than oxidative degradation
3Reliability
If membrane-based filter plants are used, then filtration occurs, but maintenance is complex and biological growth is problematic
Solution Approach 1:
The patent employs a dynamic adsorption bed system where the adsorption material can be continuously moved, replaced, and regenerated. Unlike static membrane systems that are susceptible to biological fouling and require complex maintenance, the dynamic countercurrent system allows spent material to be easily removed and replaced, simplifying maintenance and preventing biological growth through continuous material exchange
4Reliability
If conventional filter apparatus are used, then water is purified, but operating times are limited and efficiency is reduced
Solution Approach 1:
The patent divides the adsorption bed into multiple functional layers including fresh adsorption material, partially spent material, and spent material being removed. This segmentation allows different zones to perform different functions simultaneously, enabling continuous operation at high filtering rates while maintaining effective purification throughout the entire water flow path
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 approach significantly increases the service life and efficiency of the filter apparatus, achieving high superficial velocities and filtering rates, ensuring continuous operation with reduced energy consumption and environmental impact, and effectively removing trace substances and micropollutants from water.
Implementation Method 1
a countercurrent filter apparatus (1), especially countercurrent adsorption filter column, for treatment of water (W) and for uptake, storage and release, especially continuous uptake, storage and release, of at least one preferably particulate adsorption material (AK)
Data Source
AI summary
The present invention relates to a method for treatment and/or purification of water, in particular wastewater or drinking water, preferably for the adsorptive removal of inorganically or organically-based, impurities, such as trace substances and/or micropollutants, wherein, in a counterflow filter device, e.g. a counterflow adsorption filter column, the water that is to be treated and/or that is to be purified firstly, and, secondly, an, in particular particulate, adsorption material are conducted in a counterflow direction. In particular, a procedure is followed in such a manner that the water to be treated and/or purified is passed through a bed of the adsorption material present in the counterflow filter device for the adsorptive removal of impurities and the bed is exchanged and regenerated by preferably continuous removal and supply of the adsorption material in counterflow to the water that is to be treated and/or that is to be purified.