Pool Water Filtration
Published March 23, 2009 | 
Ron from California writes:
I am looking to have the safest and healthest pool water system that does not use chlorine?
Hi Ron
My expertise is in once through potable water systems. I don’t have much experience with pool water.
I do understand that it’s very unusual to have pools without some sort of secondary disinfectant in it. This is because pools are open to the atmosphere and environment and without a residual disinfectant they would very quickly become cesspools of a very active ecosystem, including things like e.coli (very common to soil, think of your bare feet on your lawn and garden then introducing it into the water) and other micro organisms that could be a potential threat.
I understand that some people can have a recirculation system through an ultraviolet disinfection device. I understand that systems like these drastically reduce the amount of disinfectant you add to your pool, but you still have to shock your system on occasion with a disinfectant, so biofilm doesn’t start growing on your underwater surfaces.
I wish I could help you further, but as I’ve said I’m out of my element and don’t want to lead you down the wrong path.
I encourage you to seek pool experts, either online or in your area. Perhaps you could go to your local pool store, see what he recommends, than ask for a list of references so you can call around and get the opinions of others who have pool and have used those systems.
I hope I’ve been of help.
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Water Treatment Project
Published October 31, 2008 | Diana from Hawaii writes:
Hi! I’m a student from maui high school. I’m having a research for my Chemistry class and my topic is about water treatment. I’m just wondering if you can give me some facts abput it and i also need to do a poster and I’m not really sure what to do.. pls give me ideas/facts.
Thank you for your question!
If your topic is about water treatment and it’s for chemistry class, perhaps you can do your topic on chlorine. Chlorine is the most common water treatment chemical in use today.
Here are some ideas for you. Click on the points to be taken to another website with some information. This is just a starting point, you may want to do some further research on your own.
- The history of chlorine, why it was first used and where.
- The types of chlorine used: Anhydrous Chlorine (Cl2), liquid sodium hypochlorite, dry calcium hypochlorite
- What happens when you add chlorine to water: The disassociation process between hypochlorus acid (HOCl) and the hypochlorite ion (OCl-), and include the pH Disassociation curve
- The difference between the states of chlorine: Free, combined, and total
- Breakpoint chlorination: what happens when you add chlorine to water. Google breakpoint chlorination and you’ll find LOTS of good stuff.
- The difference between primary and secondary chlorination.
I hope I’ve given you a good idea, and get busy googling! Let me know if you need any further help or ideas. And I will email you when your answer is up on the site if you would like to refer to it more.
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