Sunlight Sterilization of Water

[Turtle]

Originally Posted by modest

Oui. Much like SEGS

Do you have a post or a pic you can point me to with the parabolic trough from your charcoal oven? You've piqued my interest with that, and I think I was not yet a member when you were working on it

but of course.

Originally Posted by Turtle

Sun! Very sunny day. I put the oven out about 40 minutes ago & it is now at 180 deg F. Just air inside (and an oven thermometer) so far. Photo below. WARNING! Do NOT look directly into the reflector!

Originally Posted by M-ster

Water is very transparent to UV. The sputum at the bottom of this page shows the absorption coefficient. UV is light blue. So, the volume would not really matter in that respect. However, I would think you'd want to focus the light on as small a target as possible ruling out a very thick tube with a large cross section...

More than that... I guess the flow rate would depend on the luminosity on the target. Here's a source that talks a bit about it.

An exact flow rate as a function of luminosity I cannot find and wouldn't know how to calculate without more info. Sorry.

~modest

roger all. this brings us from the push to the shove, which is to say experiments. i have searched high & low for the big magnifying glass i mentioned earlier, and all so far for naught. no skin off my cheeks today though as it is raining.

[InfiniteNow]

Originally Posted by modest

Do you have a post or a pic you can point me to with the parabolic trough from your charcoal oven? You've piqued my interest with that, and I think I was not yet a member when you were working on it

http://hypography.com/forums/science...coal-oven.html

Posts 21 and 187 at the link above...

...With an interesting video from someone else in #259, and another interesting design in #289.



EDIT: Damnit! Got ninja'd by the Turtle himself.

[modest]

Thanks guys That's a good looking Archimedes death ray you got there, T

Originally Posted by Turtle

this brings us from the push to the shove, which is to say experiments...

Growth medium looks pretty cheap $(10-20):

Nutrient Agar, Dehydrated | WARD'S Natural Science

~modest

[Mercedes Benzene]

Originally Posted by modest

Growth medium looks pretty cheap $(10-20):

Nutrient Agar, Dehydrated | WARD'S Natural Science

~modest

Yeah, agar is cheap. The expensive part is the inoculation loops and sterile plates.

[Turtle]

Originally Posted by modest

Thanks guys That's a good looking Archimedes death ray you got there, T

Growth medium looks pretty cheap $(10-20):

Nutrient Agar, Dehydrated | WARD'S Natural Science

~modest

alas it was almost entirely cardboard and once it got damp it wrinkled up & i had to pitch it out with the recycling. i have a design for an all-metal collapsible model bumping around in my head, however i now think it's a poor way to make charcoal. nonetheless, the reflector for water sterilization sounds like a great school science project to me.