P16411 Pulsed Corona Water Purification Final Gate Review Aaron - - PowerPoint PPT Presentation

P16411 Pulsed Corona Water Purification

Final Gate Review Aaron Weidenaar, Julian Heckbert, Brian Nally, Travis Cunningham

Agenda

• Outcomes
• Project Status
• Test Results
• Deliverables
• Requirements
• Lessons Learned
• Meeting Notes

Project Status

• System is able to reliably generate corona underwater via

hybrid discharge in continuous flow

• Test data was obtained showing effectiveness in batch

testing, testing with continuous treatment was not able to show effectiveness with Methylene Blue

• Final design is interchangeable and capable of variable

flow rates

• Test data comparing effectiveness with power

consumption was not generated

Test Results

• E. Coli Testing
• 2 log reduction in e. Coli colonies after 6sec/ml

○ 99% kill rate

• No effect at 1.5sec/ml or 3sec/ml

○ Need to study this more Methylene Blue Testing

• Qualitative test for presence of hydroxyl
• Effective in standard hybrid discharge

○ ~1-3sec/ml to bleach indicator

• Ineffective in hybrid discharge

○ Ozone competes with hydroxyl to re-color indicator ○ Can tell whether ozone or hydroxyl dominates the reaction

MSD II vs. MSD I (Schedule)

• Team was able to complete construction and design goals

in timely manner

• Ordering water testing materials took significantly

longer than expected

• Safety meeting and changes led to unexpected delays
• Due to delays, some testing was not completed

(continuous flow pathogen treatment)

Deliverables

• Final documents, including this presentation, have been

uploaded to the EDGE website (link below)

• Other documentation specific to power supply

construction and design will be transferred via flash drive http://edge.rit.edu/edge/P16411/public/Home

(winners)

Requirements

• Most requirements were met
• Device works as expected
• Kills bacteria
• Target treatment rate not met
• Power specific performance

not found

• Biological results were promising
• Need further study
• Water softening effects
• Only in certain circumstances
• Need further study

Lessons Learned

• Keeping all members of the design process actively

engaged throughout entire process is key

• Water purity testing is difficult and expensive
• Water treatment electrochemistry is basically magic
• Sealing holes drilled in pipes is difficult
• People are very interested in water purification (ARM

Contest)

Acknowledgments:

A Huge Thanks To:

• Dr. George Slack
• Dr. Ali Ogut

Rob (Bob) EET