Page History

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Method & Result and Discussions for each sub team

Siphon-Aided Backwash

A brief description/abstract here is neededThe goal of our research is to evaluate the feasibility of a siphon-aided backwash design to be used for a sand or mixed-media down-flow filter. The benefits of siphon-aided backwash is:
1) The height of the clear-well does not need to be equal to the the head pressure required to attain 30%-50% expansion.
2) The siphon tube is designed to fill up when the filters have reached a terminal headloss (a set point we determine). Thus, they only backwash when they are dirty.
3) Since the headloss energy is used to prime the siphon, and eventually trigger backwash, fewer valves are required which reduces cost and labor.

Foam Filtration

A brief description/abstract here is needed.

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Additional experiments will be conducted to test the feasibility of our clear well design. We will first increase the scale of our model and see if the difference between the calculated and actual fluidization velocity decreases. If that is the case, we can conclude that wall friction was the major source of error in our experimentation and the actual plant size design is feasible. We will also test multi-layered media and test whether or not the same empirical equations are applicable.I thought as a result of your team's meeting with Monroe that you were focusing in a different direction.

Foam Filtration sub team

+Preliminary experimental results suggest that 90 ppi (pores per inch) outperforms the larger pore size foam of 60 ppi. Our team will further test the filtration performance of the 90 ppi foam with aid of alum coagulant and rapid mix. To accomplish this, an alum dosing and rapid mix unit will be added to our experimental setup. Additionally, we would like to further test the effects of higher flow rates on the percentage of colloid removal, and mechanisms of failure of the filter foam.