Flexible Clarifier Launder Covers for Algae Control Access
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Solution Overview
Problem
Algae growth in launder channels of clarifiers poses challenges for sewage treatment facilities, including increased total suspended solids, obstruction of hydrodynamic flow, and damage to equipment, due to the labor-intensive and costly nature of conventional removal methods, which often involve rigid materials that are difficult to access and transport.
Innovation Solution
A cost-effective clarifier launder cover (CLC) using flexible sheets with coupled inner and outer edges, supported by brackets and rigid members, that can be easily decoupled to partially uncover the launder channel for maintenance, preventing algae growth while allowing for improved access and reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid panels (metal or fiberglass) are used for launder covers, then structural strength and durability are improved, but ease of operation and accessibility deteriorate due to heavy weight and complex hinged mechanisms
Solution Approach 1:
The patent replaces rigid metal or fiberglass panels with flexible sheets made of materials such as vinyl, polyethylene, or other flexible polymers. These flexible sheets can be easily rolled up, folded, or removed to access the launder channel for cleaning, eliminating the need for heavy hinged mechanisms while maintaining coverage to prevent algae growth.
Solution Approach 2:
The flexible sheet covers are designed as inexpensive, replaceable components that can be easily removed, cleaned, or replaced as needed. This approach trades the long-term durability of rigid panels for ease of operation and lower cost, allowing facilities to quickly access the launder channel without dealing with heavy, expensive rigid structures.
2Reliability
If rigid panels are used for launder covers, then coverage effectiveness is improved, but ease of manufacture and transport deteriorate due to heavy materials
Solution Approach 1:
The flexible sheets provide adequate coverage to block sunlight and prevent algae growth while being lightweight and easy to manufacture from common materials like vinyl or polyethylene. These materials are readily available, easy to cut and install, and can be transported without special equipment, unlike heavy metal or fiberglass panels.
3Reliability
If conventional hinged panels with latches are used, then coverage is maintained, but device complexity increases due to hinges and locking mechanisms
Solution Approach 1:
The patent removes the complex hinged and latched mechanisms entirely, using simple flexible sheets that can be easily attached and detached without mechanical fasteners. This extraction of unnecessary components simplifies the system while maintaining the essential function of covering the launder channel to prevent algae growth.
Solution Approach 2:
Instead of fixed rigid panels with mechanical locking systems, the flexible sheets provide a dynamic covering solution that can be easily adjusted, removed, or repositioned as needed for maintenance activities, eliminating the need for complex static locking mechanisms.
Data Source
AI summary
A clarifier can comprise a floor, inner and outer walls that each extends upwardly from the floor such that a tank is at least partially defined by the inner wall and a launder channel is at least partially defined between the inner and outer walls and is disposed along at least a majority of a periphery of the tank. A launder cover comprising one or more flexible sheets can be disposed over at least a majority of the launder channel. Each of the sheet(s) can have opposing inner and outer edges, the inner edge coupled to the inner wall and the outer edge coupled to the outer wall, and can be configured such that, when a single one of the inner and outer edges is decoupled from the inner and outer walls, the sheet is deformable to at least partially uncover the launder channel.