Stacked Rapid Sand Filtration

Introduction

A stacked rapid sand filtration unit is preferable to a conventional rapid sand filtration unit as it requires less water to back wash since the filters are stacked, and use the same water for all filter layers to back wash. In addition, a stacked filtration system requires a much smaller footprint to achieve the same level of filtration.

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Learn about the Members of the Stacked Filtration Team and our Challenges.

Fall 2010 Research

Bench Scale Model
This is our current experimental apparatus.

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• Performance Study
  • A number of parameters will need to be studied in order to find the optimal design conditions for a filtration unit. The variables to be studied experimentally include diameter of sand grains, depth of each filter layer, horizontal spacing between pipes, and filtration velocity. A robust study of all these variables will require a long period of time, and it is thus recommended that we proceed with the design and installation of a filtration unit with conservative design parameters. Once full-scale performance can be analyzed, we can proceed with an exhaustive performance study to further optimize the stacked rapid sand filtration unit design.

Future Research

Field Scale Testing
We plan to build a stack rapid sand filter as an addition to an existing plant that uses AguaClara technology.

Past Research

Summer 2010 SRSF Research
Built initial bench scale model and initialized proof of concept.

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