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UV Applications in Low Resource Settings - Shared screen with speaker view
Mickey Fortune
Hello Everyone! Thank you so much for joining us today. If you have a question for the speakers, please begin typing them in the Q&A box.
Yoram Gerchman
Very nice low-cost design but how do you control flow rate? And make sure the lamp is not aging to much? Any "sensor"?
Khalid Ayub
very nicehow much enegy it consume during operation
Anirban Roy
Great, congratulations : Any data on (i) kWh/m3 of water produced (ii) $/m3 of water produced (iii) any economics of the lamp / is it custom designed? (iv) any strategy of large scale production + distribution? Policy interventions?The field studies: what kind of challenges you faced convincing the people actually to drink the water? social acceptability?
Stephanie Gora
Great point about supporting operations etc. through a service agreement
Yoram Gerchman
Very nice. We did related research on simple UV sytems for disinfection of Constructed Wetland traeted wastewater. If you are intrested see https://iwaponline.com/wst/article-abstract/67/3/651/17265/Constructed-wetlands-combined-with-UV-disinfectionand feel free to contact me at gerchman@research.haifa.ac.il
Matthias Saladin
Probably the cheapest way to treat water, using UV contained in sunlight: https://en.wikipedia.org/wiki/Solar_water_disinfection - a few million people are using it, according to JMP data. In spite of being essentially for free (you just need PET bottles and sunlight), the method does not spread quickly. Thus, costs are not the main road block - convenience, taste and volume of water are at least as important.
Karl Linden
One problem with SODIS is it takes hours. UV disinfection with LEDs or other UV lamps takes seconds and is basically available “on-demand” and can be run on solar or battery or on the grid.
Dionysios Dionysiou
Dear Fermin, this is a great effort and Congratulations!. Thank you for sharing the results of your work, implementation, efforts, and experience gained in this important project.
Matthias Saladin
Great insight Fermin on moving from a product to a service. Interesting that most innovation efforts still focus on developing new technologies, rather than changing the ways water/sanitation services may be improved…
Assaf Lowenthal
Wouldn't solar "disinfection" support algal growth?
Al Errington
Solar electricity for UVC is a good application. Solar light disinfection would be very limited in effectiveness because UVA & UVB from the sun has much weaker germicidal effects than UVC which can only be produced artificially.
Yoram Gerchman
@Assaf Lowenthal - this depend on availability of nitrogen and phosphorus in the water
Fermín Reygadas Robles Gil
You can learn more from our work and access the open source materials that Cantaro Azul has developed at:
Nimmy Kovoor George
Thanks Fermin, inspiring work! What is the source of the feed water in the household UV units? And how do you transport it? Also interested in knowing how you manage to convince the local government to cooperate with this effort? Any lessons learnt in that area?
Fermín Reygadas Robles Gil
Fermín Reygadas Robles Gil
Karl Linden
Check out our resources and publications on USAID Global Waters Web site for our Sustainable WASH Systems Partnership: www.globalwaters.org/sws We examine how to make infrastructure investment sustainable and less prone to failing - focusing on the issues Clarissa was highlighting around institutions, governance, and specifically professionalizing maintenance.
Pallavi Bharadwaj
Great Session! Glad to be able to join. Have to leave now. Looking forward to watching the recording later on UV filter later from Tanzania. Thank you for organizing the insightful webinar to all!
Dionysios Dionysiou
All, thank you for the presentations
Paul Onkundi Nyangaresi
Looking at the systems from D&S, can the people from marginalized/rural communities like slums afford? @ John Lubango
Babak Kavianpour
Thanks for the presentations. Will they be shared on YouTube?
Dr. Dianne Poster
Great presentations, thank you.
Tonnie Telgenhof Oude Koehorst
Thanks for the presentations. For all those that are interested in solar powered water treatment systems for rural areas, see www.nedap-naiade.com for technical information and several cases.
Jose Arauz
Great presentations, Latinamerica represented, congrats Dr Fermin
miguel Gonzalez
Thanks to all speakers for the presentations. What do you think of LED technology implementation to reduce maintenance and potential contamination with mercury.
Nimmy Kovoor George
I believe there are many case studies of UV solutions in low resource settings that have succeeded. Does IUVA have a reporting mechanism where they discuss the site- specific strategies to make administration in these settings to co-operate?
Pasquale Attrotto
Do John and Fermín have experience with UV LEDs?
Nicholas Onkoba
many thanks for this Webinar , keenly following from Nairobi, Kenya. accessibility to clean water is a dire need and conceted effort UV LEDs is a realisable solution.
Evans Ogoti
This is very educative keenly following from moshi Tanzania
Khalid Ayub
beautiful plan work presented by Dr Fermin. thank you
Nimmy Kovoor George
@John, how often do you have to maintain this filter speaking on general terms?
Nimmy Kovoor George
In the low resource settings, are we really worried about of organic micropollutants at this point?
Assaf Lowenthal
About checking whether water quality is suitable for UV: there is a mobile UVT meter that can be hooked up to the car. It's expensive, but works.
Fermín Reygadas Robles Gil
Here is my email:
Fermín Reygadas Robles Gil
Hadas Mamane
Email of John: john.lubango@dayliff.com
Hadas Mamane
Email of Clarissa: cbrockle@email.unc.edu
Nimmy Kovoor George
A question out of curiosity on the human aspect of access to safe drinking water: which section of the community (children, women, men, educated people??) has the steepest learning curve or are most motivated to be trained for water disinfection system?
Fermín Reygadas Robles Gil
Responding to Anirban Roy:(i) kWh/m3 of water produced: 5L/min 15 Watt lamp (20 Watts including inefficiency of ballast)(ii) $/m3 of water produced: it varies between a household system, to school, to community kiosk, to piped water system. It is not a metric that we keep or that has so far affected our operations.(iii) any economics of the lamp / is it custom designed?: generic 15Watt lamps, cost of around $10/lamp
Fermín Reygadas Robles Gil
Nitish Ranjan Sarker
Loved the session and the discussion around major SDG-6 challenges, the need for 'water-as-a-service' model, and the detailed scope of UV treatment. Will reach out to the speakers to discuss more on the subject matter and collaboration opportunities. Thanks to IUVA for organizing this event!
Stephanie Gora
Wonderful webinar -- thanks to the organizers and speakers!
Jim Gaines
UV fluorescent sources are pretty efficient. 30-50% of the electrical energy is converted to UV light, which is hard to beat. The efficiency of LED is much lower presently and depends pretty strongly on which wavelength you want to produce. (Longer wavelength/lower energy UVA is more efficient with LED than shorter wavelength/higher energy UVC with LED.) There is a lot of research in LED, so things are changing. From water purification point of view, it is probably something to monitor at this point, and jump in if/when LED efficiency breakthroughs happen.
Babak Kavianpour
Thank you Dr. Beck
Ismail Gobulukoglu
Great discussion! Thank you.
Yu Chen
Wonderful seminar! Many thanks to everyone!
Minghao Kong
Thank you for the great presentations.
Patrick Mirindi
Thank you to the presenters and moderators. Very informative