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[APD] Thoughts on RO and the environment
I keep seeing references to RO. It bothers me knowing that some of the
people posting these references and even recommendations to use RO come from people
living in places like Las Vegas and Los Angeles. I think you people need to
take a drive about 20 miles from civilization and look around. You'll quickly
notice that you live in a desert.
I used to live in Western NY, next to the largest fresh water reserve in the
world. Plenty of water, plenty of non-irrigated farms. Water everywhere. My
neighborhood was built on a seasonal wetland, and there was a swamp behind my
house where the northern pike fishing was great. RO there makes perfectly
reasonable sense.
But not in Phoenix, Tucson, Santa Fe or San Diego. The Los Angeles River is a
concrete trench that movie makers like to use for chase scenes and car races,
most recently in "The Italian Job". By the time the Colorado River reaches
the end of its course in the Gulf of California, it's only a fraction of the
flow that enters the reservoir behind Hoover Dam, and most of it comes from
tributary rivers along the way. Because L.A. is a thirsty place with a growing
population, there is occasional talk about diverting the Snake from Idaho down
to Utah to give LA even more of the water it needs for critical issues like
washing cars.
Ten years ago I moved to Idaho, and found that litigation lawyers here make
more money on water rights disputes than anything else including ambulance
chasing, and most of that is disputes between states protecting their agriculture
and the tree-huggers trying to get more water for the fish. Just because
there is water coming out of the tap every time I go to the kitchen sink, that
doesn't mean I should abuse the water supply. There are alternatives. Like
De-ionization.
The reason we should use DI instead of reverse osmosis in water-challenged
areas like the American West (Washington and Oregon rain-forest areas excluded)
is because RO units can generate up to five gallons or more of "Waste" water
for every gallon of purified water. And that waste water just runs to the
nearest water-treatment plant. Most of them still use DI secondary stages to
finish the job of purification anyway.
Yes, there is maintenance with DI units, but there is with RO, too. If using
rechargeable resins, the DI will cost about the same per gallon as changing
filters in the RO unit. With a little effort, it isn't hard to find a water
treatment company that will swap you resins for a fee and do the recharging to
give to another customer.
A couple years ago the state of Idaho decided that the water coming from
certain rivers was "Water-to-die-for" for tropical fish farmers, and actually
sponsored a couple breeders with grants for facilities and equipment. But when
these lucky individuals starting requesting more water because they needed to do
10-20% daily water changes in their discus fry tanks, the state had a hissy
and shut the whole thing down.
If you live in Pennsylvania, ignore this posting, but if nearby farmers are
running irrigation systems, think twice about your RO unit. We in the aquarium
hobby are generally ecology-sensitive and concerned with issues like
bio-diversity and environmental conservation, but we use electricity and water like
our actions have no impact on the planet whatsoever. Please, all I'm asking is
that you think and act responsibly.
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