Final Report

Project Proposal

Filter Update 6/5/2013

Week Nine and Ten Completed Tasks

Final Turbidity Readings 

The turbidity readings for week nine were 2.2 NTU for the river and 2.15 NTU

Flow rate: 240 mL / hr

Results Charts

Filter Update 5/29/2013

Week Eight Completed Tasks

Filter Readings

Glue used to affix outflow hose to main filter body was found to be completely permeable. This was fixed by coating with nail polish. Filter no longer leaks, outflow hose functioning properly. Last week's results were promising, I expect this week's to be better.

Turbidity readings to date:
Wk 5: .73 influent, .03 effluent (turbidity meter was improperly calibrated)
Wk 6: 8.01 influent, 3.79 effluent
Wk 7: 16.26 influent, 1.69 effluent
Wk 8: 11.56 influent, .55 effluent

Breaking up the rust layer has more than doubled the flow rate.

Filter Update 5/21/2013

Week Seven Completed Tasks

Turbidity and Flow Rate Measurements 

The turbidity measurements were 16.26 (river water) and 1.69 (filtered river water). In class we also decided that everyone would let their filter run dry and let it remain dry for 12 hours before feeding it again. We also attempted to measure the flow rate.

Flow rate had decreased to nil. I suspect this is due to iron filings fusing together as they rust, forming an impenetrable layer. I broke up this layer by poking it, and flow rate has returned to normal. New flow rate measurement to come.

Filter Construction Photo

The filter construction is still underway as adjustments are being made. Since the time the photo was taken, the filter has been moved to another room.