Good grief man, are you trying to kill someone?!? /s
"Come on in, the water's fine!"
It is to cry...
Posted on 08/13/2016 8:02:17 PM PDT by PROCON
RIO DE JANEIRO — Olympics officials on Saturday gave what they said was a definitive explanation why the water in two competition pools turned green this week. Someone, the officials said, mistakenly added 160 liters of hydrogen peroxide on Aug. 5, neutralizing the chlorine and allowing the growth of “organic compounds” that might have included algae.
On Saturday, the water in the diving pool was still a murky bottle-green color, while the water in the second pool, used for water polo and synchronized swimming, had begun to look a bit lighter and a bit bluer. Athletes have been complaining that the water or the chemicals treating it hurt their eyes, and that murkiness makes underwater visibility impossible.
Synchronized swimming, in which athletes have to be able to see each other below the surface, is scheduled to start Sunday. Mario Andrada, a spokesman for the Rio Games, said that to ensure that the competition could go ahead, officials would drain the water from the pool — all 3,725,000 liters of it — and replace it with clean water from a nearby practice pool.
(Excerpt) Read more at nytimes.com ...
Don’t they build Commercial Airliners in Brazil?
There are obviously intelligent people there.
The Brazilian Olympic Committee should have hired a few.
They need to tell the swimmers to stop peeing in the pool.
Why the iOC chose a third world nation to host the games is beyond me....
Liberal white guilt most likely
hydrogen peroxide is clear and colorless,
and is activated by chlorine.
there is something else.
I can tell by the Easter egg green water that what happened is the water has copper in it, and the PH was abruptly raised followed by a chlorine shock. Not algae.
Happened exactly that way to mine several times to mine.
A problem humans have probably solved a million times before, over several decades with modern chemicals, in nearly every environment — and yet, the pool is still green. If stupidity was an Olympic sport...
Barley straw works quite well.
How does it work?
“Barley straw does not kill existing algae, but it inhibits the new growth of algae. The exact mechanism is poorly understood, but it seems that barley straw, when exposed to sunlight and in the presence of oxygen, produces a chemical that inhibits algae growth.”
http://extension.psu.edu/natural-resources/water/ponds/barley-straw
Finally, proof for the existence of Schrodinger’s swimming pool.
I’ll bet they mistook the copper problem for an algae problem. Then they did a hydrogen peroxide shock to kill the algae. All of this is probably done by a local pool maintenance contractor who doesn’t know what he’s doing. He’s then giving half baked explanations to the olympic organizers who are passing them along with their own added misinterpretations. The media is of course clueless and just prints what they’re being told without really understanding or questioning it.
#7 - Bwahahahaha! Perfect...
Good grief man, are you trying to kill someone?!? /s
"Come on in, the water's fine!"
It is to cry...
This explains much...and probably not too far off.
A fire hydrant is around 1,000 gpm, or 60,000 gallons in an hour.
New water should be doable...:^)
I took a look at some typical 50m (Olympic length) pool designs. For a 50m long (164.05’) x 25m wide(82’) x 4’-16’ pool, we are looking at about 862,000 gal plus 14,000 gal in surge capacity. Location of pump room and surge tank might vary the surge by a factor of 2-3; say about 900k gallons. The lap pool without diving might be about 300k gal.
Filtration lines tend to be sized with the pumping system to change the water through the filters 4x/day. say about once every 6 hrs give or take.
Piping of effluent and influent from filtration system to/from the pool tends to be 12” dia, dependent upon the size of inlets and drains in the pool.
All inlets and drains may not exceed 6fps in velocity or suction lock of 5ft in 100ft of line.
The main lines will flow about 2000 gpm, but the refill supply lines are likely 4” lines with likely recharge at between 200 to 400gpm.
Bottom line, even without short circuiting the flows, you have to drain about a million gallons at no more than about 2000 gpm and recharge at probably no more than 500 gpm using the existing plumbing.
It’s a public arena, so you probably can’t drain the fire mains by more than 500-1000 gpm without limiting the numbers of people in a gathering place to meet fire codes.
If you brought in fill and drain pumps, ran say 2000 gpm at night, using specific gravity pumps, you could drain in about 7.5 hrs and then refill it in another 7.5 hrs, but then you’d have to make sure that water was disinfected and treated and you have a water source available for a million gallons without risking other Fire Main reservoirs.
Most systems take about 3 days to drain and 3 days to recharge, or they focus on blending and chemical treatment to meet health standards.
In highly public water facilities a greater emphasis is usually placed on odor and appearance of the water. The chemistry can be daunting. For example, a trace of benzene in the water might make the water smell and taste infected, while the quantities are 3-5 orders of magnitude less than safe drinking levels and 2 orders of magnitude finer than most filtering processes.
FWIW, if the rivers and beaches are as dirty as advertised, they might not be tooled up with the trade in that industry. Many third world nations with high precipitation levels simply rely on the high water flow rates to keep things clean, and don’t bother treating it. Why treat it when the next rain washes it away???
It might be easier to blame the international visitors for littering their streets and jamming up the ecosystem, then clean it up afterwards at a slower pace by natural processes.
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