Pressurized Dome Aerator With Intermeshed Discs
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Solution Overview
Problem
Current wastewater treatment methods, such as activated sludge processes, face inefficiencies in oxygen dissolution and distribution, leading to reduced biochemical consumption and increased operational costs due to high energy consumption and waste of oxygen, especially in warm temperatures and environments with high concentrations of unwanted gases.
Innovation Solution
A pressurized dome aerator system with intermeshed rotating discs and a blower to increase dissolved oxygen levels by creating a shear force between air and oxygen-depleted liquid, using a sealed environment to trap gases and prevent foam and odor escape, and variable speed drives for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional aeration methods are used to increase dissolved oxygen levels, then oxygen dissolution is improved, but energy consumption increases and oxygen distribution becomes inefficient
Solution Approach 1:
The patent replaces conventional mechanical aeration systems (pumps, compressors, diffusers) with a natural convection-based system. The inclined plate aerator creates density-driven flow where warm, oxygenated water naturally rises and cold water sinks, eliminating the need for high-energy mechanical mixing while maintaining effective oxygen dissolution.
Solution Approach 2:
The patent changes the physical parameters of the aeration process by using inclined plates at specific angles (15-45 degrees) to optimize the conversion of potential energy to kinetic energy. This geometric parameter optimization enables efficient oxygen transfer without requiring additional energy input, as the system leverages natural density differences in the water.
2Temperature
If conventional aeration systems operate in warm temperatures, then oxygen dissolution capacity decreases, but aeration effectiveness is reduced
Solution Approach 1:
The patent creates periodic flow patterns through the inclined plate aerator, where water alternately rises and falls in a continuous cycle. This periodic motion enhances gas-liquid contact time and improves oxygen transfer efficiency even in warm temperatures, as the repeated exposure to air-water interfaces compensates for the reduced solubility capacity.
3Object-affected harmful factors
If high concentrations of unwanted gases are present, then treatment complexity increases, but removal efficiency must be maintained
Solution Approach 1:
The inclined plate aerator performs multiple functions simultaneously: it oxygenates the water, removes unwanted gases through degasification, mixes the water column, and drives flow through the system. This multi-functionality eliminates the need for separate equipment for each treatment objective, reducing overall system complexity while effectively handling high concentrations of unwanted gases.
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 system reduces installation and operational costs while enhancing biochemical oxygen demand (BOD) treatment efficiency, sustaining a higher number of aerobic bacteria, minimizing foam and noise, and maintaining optimal oxygen levels in wastewater treatment.
Implementation Method 1
creating a shear force between air and oxygen-depleted liquid
Implementation Method 2
pressurized dome aerator system with intermeshed rotating discs and a blower to increase dissolved oxygen levels by creating a shear force between air and oxygen-depleted liquid, using a sealed environment to trap gases and prevent foam and odor escape
Data Source
AI summary
A system for treatment of suspended solids in a liquid medium having a one pond, an apparatus for controlled ventilation and aeration of a liquid medium, the apparatus having a dome supported by a flotation device, a blower, a lower housing supported by the flotation device, the lower housing connected to the dome, an aeration apparatus positioned within the sealed space and partially submerged in the flotation liquid, and having one or more parallel shafts, at least one first disc positioned axially on one of the shafts, at least one second disc positioned axially on another of the shafts, wherein the second disc is interleaved relative to the first disc, and wherein a surface of the first disc rotates in a direction opposite a surface of the second disc relative to each other resulting in a mixing area therebetween, and wherein the apparatus is positioned within the pond.