Artificial Aquifer Design for Groundwater Purification
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Solution Overview
Problem
Existing artificial aquifer systems suffer from dead zones and negative pressure issues, leading to inefficiencies and high energy consumption, as well as challenges in maintaining optimal conditions for microorganisms responsible for water purification, particularly in areas with destroyed natural layers or inadequate material compositions.
Innovation Solution
An artificial aquifer design featuring a basin filled with natural materials, a perforated feeding line, and a circular arrangement of satellite wells, with a main well connected to a pumping well via a regulating valve to maintain water levels and avoid dead zones, ensuring balanced pressure and optimal microorganism environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water is pumped from satellite wells and recharged into other satellite wells to create oxidation and reduction zones, then purification of metals, metalloids, nitrate, nitrite, pesticides and organic micro contaminants is achieved, but dead zones are created in the aquifer and energy consumption increases
Solution Approach 1:
The system implements periodic pumping cycles where water is alternately pumped from different satellite wells and recharged into others, creating time-varying oxidation and reduction zones. This periodic operation prevents dead zones by ensuring all aquifer regions are periodically activated, while the cyclic nature allows optimization of energy consumption through controlled timing and duration of pumping phases.
Solution Approach 2:
The system dynamically adjusts the operational state of satellite wells, transitioning them between pumping and recharge modes based on predetermined sequences. This dynamic operation creates moving oxidation and reduction zones throughout the aquifer, eliminating static dead zones while optimizing energy usage by coordinating the timing of water extraction and injection across multiple wells.
2Reliability
If satellite wells are arranged around extraction wells to create reaction zones, then purification of ground water is achieved, but negative pressure conditions occur in the aquifer affecting microorganism growth
Solution Approach 1:
The system creates localized oxidation zones and reduction zones at different satellite well locations by controlling which wells are in pumping mode versus recharge mode. This spatial differentiation of functional zones ensures that pressure conditions are optimized locally at each well, preventing widespread negative pressure while maintaining effective purification functions in each zone.
Solution Approach 2:
The system monitors pressure conditions and operational states of satellite wells, using this information to adjust pumping and recharge sequences. This feedback control ensures that negative pressure conditions are prevented by coordinating well operations to maintain balanced hydraulic conditions throughout the aquifer while sustaining effective reaction zones for purification.
3Productivity
If water circulation is intensified to improve purification, then removal of trace elements is enhanced, but energy consumption and operational complexity increase
Solution Approach 1:
The system divides the aquifer into multiple satellite well zones, each capable of independent pumping and recharge operations. This segmentation allows purification to occur simultaneously in multiple locations through coordinated operation of individual wells, enhancing overall purification rate while maintaining manageable complexity by treating each well as a semi-independent unit with standardized control logic.
Solution Approach 2:
Each satellite well is designed to perform multiple functions: water extraction, oxygen injection for oxidation zones, and recharge to other wells. This multi-functionality allows a single well structure to contribute to multiple purification mechanisms and hydraulic circulation patterns, increasing productivity without proportionally increasing system complexity by reusing standardized well components and control systems.
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 design eliminates dead zones, reduces energy consumption, and enhances water purification efficiency by maintaining consistent water levels and avoiding negative pressure, thereby improving the overall performance of the filtration and cleaning process.
Implementation Method 1
a main well connected to a pumping well via a bottom outflow provided with a regulating valve to maintain a given level of water in the aquifer
Implementation Method 2
Ground water purification plant based on biological oxidation and reduction processes
Implementation Method 3
Ground water purification plant based on biological oxidation and reduction processes
Implementation Method 4
EP-A-0 154 105 describes reduction of nitrate in ground water by means of denitrification in a reduction zone
Data Source
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AI summary
The present invention relates to an artificial aquifer for decreasing the contents of metals, metalloids, nitrate, nitrite, pesticides and organic micro contaminants in natural ground water or artificial infiltrated groundwater from surface water. The system comprising a basin ( 1 ) of filling material creating a reaction zone (5) a feeding line (3), one or more satellite wells (4), at least one main well (6) and a pumping well (7). whereby the feeding line (3) is applied in the upper outer periphery of the basin ( 1 ) and wherein the main well (6) is connected to a pumping well (7) via a bottom outflow provided with a regulating valve to maintain a given level of water in the aquifer The invention further relates to a method for purifying water.