Flexible Launder Covers for Clarifier Algae Prevention
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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, obstructed hydrodynamic flow, and damage to equipment, due to the labor-intensive and costly nature of conventional removal methods, and the difficulty in accessing and transporting rigid launder covers.
Innovation Solution
A cost-effective clarifier launder cover (CLC) comprising flexible sheets with coupled inner and outer edges, deformable to partially uncover the launder channel, and supported by brackets and rigid members, which are easier to access and transport, and made from geomembrane materials to block sunlight and prevent algae growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rigid launder covers (metal or fiberglass panels) are used to block sunlight and prevent algae growth, then algae prevention effectiveness is improved, but weight and ease of transport deteriorate
Solution Approach 1:
The patent applies this principle by replacing rigid metal or fiberglass panels with flexible sheets made of lightweight materials such as polyethylene, polypropylene, or other plastics. These flexible sheets are configured to cover the launder channel and block sunlight, preventing algae growth while being significantly lighter and easier to transport than conventional rigid covers. The flexible nature allows the sheets to conform to the launder channel shape while maintaining their light weight.
2Stability of the object's composition
If rigid launder covers with latches or locking tabs are used to secure panels, then cover stability is improved, but ease of operation deteriorates due to difficult access for maintenance
Solution Approach 1:
The patent applies this principle by designing a dynamic securing system where the flexible sheet can be easily attached and detached from the launder channel. Instead of fixed latches or locking tabs that require complex access, the flexible sheet can be secured using simple clips, clamps, or tensioning mechanisms that allow rapid installation and removal. This dynamic system maintains stability during operation while enabling easy maintenance access when needed.
3Object-affected harmful factors
If conventional rigid launder covers are used, then sunlight blocking effectiveness is improved, but manufacturing cost and ease of manufacture deteriorate
Solution Approach 1:
The patent applies this principle by using inexpensive flexible sheet materials such as polyethylene or polypropylene that can be manufactured at low cost through standard plastic extrusion or molding processes. These sheets can be produced in various sizes and shapes to fit different launder channels, and if damaged or soiled, can be easily replaced rather than repaired, reducing long-term maintenance costs while maintaining effective sunlight blocking.
4Object-generated harmful factors
If manual scrubbing or herbicide application is used to remove algae from launder channels, then algae removal is achieved, but labor intensity and operational cost increase
Solution Approach 1:
The patent applies this principle by installing the flexible sheet cover before algae growth can occur. The sheet acts as a preventive barrier that blocks sunlight from reaching the launder channel water, preventing photosynthesis and algae formation in the first place. This eliminates the need for subsequent algae removal activities such as manual scrubbing or herbicide application, significantly reducing labor intensity and operational costs while maintaining continuous effectiveness.
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 flexible launder cover effectively prevents algae growth, reduces maintenance costs, and provides improved access to the launder channel without the need for labor-intensive manual scrubbing or herbicides, while being lightweight and easy to transport, thus addressing the challenges of conventional rigid covers.
Implementation Method 1
flexible sheets disposed over at least a majority of the launder channel... made from geomembrane materials to block sunlight and prevent algae growth
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.