Lamella Sedimentation Tank

Abstract

The Lamella Sedimentation Tank design was design to test different variables, such as lamella spacing, lamella length and joint performance with sludge blankets, that can affect the overall sedimentation process. These variables are being test the limits of our design.

Introduction

Design and Methods of the Sedimentation

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Tank with Lamella

A preliminary design was done for the lamella tank. This design is still under review to determine if this algorithm was truly the best way to calculate the length of the lamella. It is intended that another design will be created that does not assume a set b (baffle spacing) value.

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The inlet design, the effluent launder design, tank drain design will all be the same as for the floc blanket sedimentation tank. The only difference is that the inlet will have to enter the tank below the lamella and thus two 22.5 degree angle bends are to be used to lower the inlet pipe level from where it exits the floc tank to where it needs to enter the sedimentation tank. This tank was designed to be versatile and the lamella placed close enough to the top of the tank to allow for the possibility that a floc blanket could be formed underneath the lamella if desired.

Grid Lamella Design with Set Spacing

Lamella Design
The lamella were designed out of corrugated plastic. Flow was designed to move upward through the grid of channels in parallel. The dimensions of the material proposed for use are listed below.

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