Aeration Chamber with Concentric Ridges for Sludge Digestion

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Solution Overview

Problem

Current aeration devices are not suitable for efficiently aerating and breaking up solid particles in high-solids content sewage waste, nor do they effectively improve sludge digestion efficiency, reduce operation and maintenance costs, or remove hydrogen sulfide and heavy metals without chemicals.

Innovation Solution

A cylindrical aeration chamber with internal divider walls and a base for stability, using air pressure to direct liquid and solids against stationary concentric ridges, breaking particles and enhancing oxygen transfer, constructed from non-corrosive materials with no moving parts or electrical components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional aeration devices are used for high-solids content sewage waste, then aeration function is provided, but solid particles are not effectively broken up and sludge digestion efficiency is not improved

Engineering Contradiction:

Improvesludge digestion efficiencyVSAvoidparticle breakdown effectiveness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The aeration chamber is divided into multiple internal chambers using a plurality of internal divider walls, creating segmented flow paths that enhance mixing and particle breakdown while maintaining aeration functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A weighted base member is introduced as an intermediary element to prevent the chamber from floating and to provide stable positioning, enabling effective particle impact and breakdown

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If aerators with complex mechanisms are used to improve aeration efficiency, then oxygen transfer is enhanced, but operation and maintenance costs increase

Engineering Contradiction:

Improveoxygen transfer efficiencyVSAvoidoperation and maintenance cost

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The aerator is designed with no moving parts or electrical components, allowing the system to self-aerate through passive air injection and natural convection currents, eliminating maintenance requirements while maintaining effective oxygen transfer

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Complex mechanical aeration mechanisms are replaced with a simple air injection system that uses air pressure differentials and natural fluid dynamics to achieve effective aeration without motors or moving components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If chemical methods are used to remove hydrogen sulfide and heavy metals, then removal efficiency is improved, but chemical usage and associated costs increase

Engineering Contradiction:

Improvecontaminant removal efficiencyVSAvoidchemical usage

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The aerator converts harmful anaerobic conditions that produce hydrogen sulfide into beneficial aerobic conditions through continuous air injection, allowing natural oxidation to convert hydrogen sulfide to sulfur and other less harmful substances, thereby removing contaminants without chemicals

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 aerates and breaks down solid particles, improves sludge digestion, reduces operation and maintenance costs, and removes hydrogen sulfide and heavy metals without chemicals, facilitating nitrification and maximizing oxygen transfer.

Implementation Method 1

Air is inlet at its upper end through an air inlet hole into an upper air manifold wherein the air then travels downwardly through an air feed pipe to a plurality of air outlet holes wherein the air is released and rises thereby causing a flow of material through the inlet ports upwardly along the internal divider walls

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

the stream of liquid containing the solid material is directed onto a series of stationary concentric ridges wherein the solids in the liquid material are forcefully impacted against the stationary concentric ridges so as to break the solid particles up into smaller particles

Methodology Applied

Scientific EffectImpact force: Impact Force

Data Source

PatentUS7963508B1Method and apparatus for digesting sludge

Publication Date: 2011.06.21 MCGUFFIN THOMAS R

AI summary

A method and apparatus for aerating liquid which includes an aeration chamber having an inlet port at its lower end an outlet port at its upper end wherein the chamber is divided into multiple internal chambers using a plurality of internal divider walls. The chamber is weighted with a base member so that it will not float. Air is inlet at its upper end through an air inlet hole into an upper air manifold wherein the air then travels downwardly through an air feed pipe to a plurality of air outlet holes wherein the air is released and rises thereby causing a flow of material through the inlet ports upwardly along the internal divider walls and aeration chamber and then out of the chamber at its upper outlet port so that the stream of material is directed onto a series of stationary concentric ridges wherein the solids in the liquid material are forcefully impacted against the stationary concentric ridges so as to break the solid particles up into smaller particles.