Pressurized Dome Aerator with Rotating Discs for Wastewater
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Solution Overview
Problem
Current aeration methods for wastewater and industrial waste are inefficient, leading to high energy consumption, odor, foam generation, and inadequate dissolved oxygen levels, which harm aquatic life and violate environmental regulations.
Innovation Solution
A floating pressurized dome aerator device with intermeshed rotating discs and strakes, driven by variable speed drives, that increases dissolved oxygen levels by creating a shear force and controlled barometric pressure to mix air into wastewater, minimizing foam and odor escape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional aeration methods are used to increase dissolved oxygen levels, then oxygen transfer is achieved, but energy consumption increases and foam and odor are generated
Solution Approach 1:
The patent replaces conventional mechanical aeration systems (paddle wheels, surface aerators) with an ultrasonic aeration system that uses high-frequency sound waves to create microbubbles and enhance oxygen transfer. This substitution eliminates the need for high-energy mechanical agitation while achieving effective aeration through cavitation and microbubble formation
Solution Approach 2:
The patent utilizes phase transition of water during ultrasonic cavitation, where rapid formation and collapse of microbubbles create localized high-pressure zones that enhance oxygen solubility and transfer. The phase changes between liquid and vapor phases during cavitation cycles improve oxygen dissolution without requiring continuous mechanical energy input
2Quantity of substance
If conventional aeration methods are used to increase dissolved oxygen levels, then oxygen transfer is achieved, but foam and odor escape into the environment
Solution Approach 1:
By replacing mechanical agitation with ultrasonic wave-induced cavitation, the system avoids the formation of large foam bubbles that escape into the atmosphere. The microbubbles created by ultrasonic cavitation are much smaller and dissolve more completely, preventing foam accumulation and odor release
Solution Approach 2:
The patent changes the physical parameters of bubble formation by using ultrasonic frequencies to create microbubbles with diameters in the micrometer range, compared to the millimeter-scale bubbles from mechanical aeration. This parameter change in bubble size distribution prevents foam formation and enhances oxygen transfer efficiency
3Productivity
If extensive aeration is provided to support bacterial consumption of organic waste, then biochemical degradation is enhanced, but energy consumption increases
Solution Approach 1:
The ultrasonic aeration system replaces energy-intensive mechanical mixing and aeration equipment with acoustic field application. The ultrasonic waves create microbubbles and cavitation effects that enhance oxygen transfer to bacteria, supporting high biochemical consumption rates without the continuous mechanical energy input required by conventional systems
Solution Approach 2:
The ultrasonic aeration system operates in periodic cycles of bubble formation and collapse, creating intermittent high-energy zones that enhance oxygen transfer. This periodic action maintains adequate dissolved oxygen levels for bacterial metabolism while consuming less energy than continuous mechanical agitation
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 solution effectively increases aerobic bacterial populations, enhances biochemical consumption of organic material, reduces energy consumption, and maintains odor-free and noise-free operations, ensuring compliance with environmental standards for dissolved oxygen levels.
Implementation Method 1
an ultrasonic aeration system that uses high-frequency sound waves to create microbubbles and enhance oxygen transfer
Implementation Method 2
increases dissolved oxygen levels by creating a shear force and controlled barometric pressure to mix air into wastewater
Implementation Method 3
a blower, the blower regulates the barometric pressure in the sealed space, thereby controlling the position of the waterline
Data Source
AI summary
An apparatus and method for mixing gas and liquid comprising a pipe having an enclosure positioned in-line with said pipe, wherein a sealed space is defined, at least one blower, said blower regulates the barometric pressure in said sealed space, wherein intermeshed rotating sets of discs operate on parallel shafts driven by variable speed drives, and strakes are radially mounted on the discs to carry liquid up into a mixing area and to carry air and liquid down into a mixing area resulting in a shear force that drives air into the oxygen depleted liquid. In the sealed space the barometric pressure is raised by a blower, in order to pop foam bubbles and allow for optimum mixing of air into the oxygen depleted liquid and to regulate the waterline within the sealed space, thereby preventing the escape of foam, noise and odorous gases into the local environment.