Large Bubble Mixer for Wastewater Mixing and Oxygenation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wastewater treatment methods in aerobic and anoxic zones face inefficiencies due to high power consumption and incomplete mixing, leading to reduced oxygenation and slowed treatment processes, especially when using tiny bubbles for mixing and mechanical mixers.
Innovation Solution
A tank design incorporating a mixer that generates large mixing bubbles (6 inches to 10 feet in diameter) to create a mixing current, which promotes pollutant conversion in both aerobic and anoxic zones, while maintaining anoxic conditions and integrating an Integrated Fixed-film Activating Sludge (IFAS) system for enhanced efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tiny bubbles are used for mixing in aerobic zones, then oxygenation is improved, but power consumption increases and mixing completeness deteriorates
Solution Approach 1:
The patent segments the mixing function by using multiple large bubbles instead of one large volume of tiny bubbles. Each large bubble acts as an independent mixing element that rises through the wastewater, creating localized mixing zones. This segmentation maintains effective oxygenation while reducing the total energy input required for mixing compared to using numerous tiny bubbles.
Solution Approach 2:
The patent changes the key parameter of bubble size from tiny (conventional) to large (6 inches to 10 feet in diameter). This parameter change fundamentally alters the mixing mechanism - large bubbles create stronger rising currents that promote more complete mixing while requiring less energy input per unit volume of wastewater treated.
2Ease of operation
If mechanical mixers are used for mixing, then mixing action is provided, but power consumption increases and treatment efficiency decreases
Solution Approach 1:
The patent replaces the mechanical mixer system with a gas-driven bubble system. Instead of using mechanical impellers or agitators that consume significant power, the system uses rising large bubbles to create mixing currents. This substitution eliminates the need for heavy mechanical equipment while improving treatment efficiency through more effective natural convection currents.
3Use of energy by moving object
If large mixing bubbles are generated, then power consumption is reduced and mixing completeness is improved, but maintaining anoxic conditions becomes challenging
Solution Approach 1:
The patent applies local quality by generating large mixing bubbles selectively in specific zones (aerobic or anoxic) rather than uniformly throughout the entire reactor. In anoxic zones, the system carefully controls bubble generation to provide mixing while minimizing oxygen transfer, thereby maintaining the required anoxic conditions locally while still achieving complete mixing through the strong rising currents.
4Quantity of substance
If tiny bubbles are used for mixing, then oxygen supply is enhanced, but mixing completeness deteriorates
Solution Approach 1:
The patent introduces dynamics by using large bubbles that rise and move through the wastewater, creating dynamic mixing currents that adapt to the flow conditions. Unlike static or slowly moving tiny bubbles, the large bubbles generate strong upward currents that actively circulate the wastewater, ensuring complete mixing throughout the reactor volume while still providing effective oxygenation.
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 use of large mixing bubbles effectively mixes wastewater and microorganisms, reducing power consumption and ensuring complete mixing, thereby enhancing pollutant conversion and treatment efficiency in both aerobic and anoxic zones without disrupting anoxic conditions.
Implementation Method 1
The mixing bubbles are large enough to move wastewater as they rise to the surface and generate a mixing current in the wastewater
Implementation Method 2
The mixing current mixes the wastewater, and bacteria and other microorganisms to promote the bacteria and other microorganisms' conversion of the pollutants contained in the wastewater
Data Source
AI summary
A system for wastewater treatment comprises a tank and includes a mixer that generates large mixing bubbles, for example a bubble having a largest dimension of 6 inches to 10 feet. In some embodiments, the mixer is located in the anoxic zone. The mixing bubbles are large enough to move wastewater as they rise to the surface and generate a mixing current in the wastewater. The mixing current mixes the wastewater, and bacteria and other microorganisms to promote the bacteria and other microorganisms' conversion of the pollutants contained in the wastewater. The system further comprises an Integrated Fixed-film Activating Sludge (IFAS) system.