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Re: Kold Steril (was APD V4 #351
>Date: Sat, 17 Jun 2000 22:56:02 +0000
>From: George Slusarczuk <yurko at warwick_net>
>Subject: Re: Kold Steril (was APD V4 #351
>You did not, however, give the metal concentration specifications for
>the starting water, nor for the effluent, and that is crucial.
>What will be the concentration of the six metals (advertised as being
>removed) in the FIRST 10 gal of the effluent, as well as in the LAST 10
>gal, (i.e. in the 0-10 gal. & 4990-5000 gal. fraction of the effluent)
>starting, say, with a 0.1 ppm concentration of each metal in the
>starting raw water.
>That would give one a feeling for both the efficacy and capacity of the
>system. For some reason these figures are not provided on the website.
First of all the Kold Ster-il (r) is designed to filter potable
water . Your question eliminates any potable water filter because your
situation is totally nonpotable water.
Under US EPA Standards : Maximum allowable concentrations of these
contaminates: Lead 0.015mg/L , Mercury 0.002mg/L , Cadmium
0.005mg/L . Your question invents a situation where a constant
0.100 mg/L of each metal is to be tested. You need to visit the
manufacturer's website and then ask them the question again. In
challege under ANSI/NSF Standards 53,53b for heavy metals , filter
media are subjected to 0.150 mg/L concentration of each of the
three metals i.e. Lead, Mercury, Cadmium. Kold Ster-il's last canister
will sorb 1500 gallons of the three heavy metals at a 0.150 mg/L
or 150 part-per-billion x 3 or 450 part-per-billion.
The first stage medium will sorb 0.150 mg/L of the three metals
for 2500 gallons. So the Kold Ster-il (r) is capable
of stripping thousands of times the legal (potable water
concentration) of heavy metals for 4,000 gallon of water. The other
three heavy metals copper, iron and zinc are also listed on the
U.S EPA Standards Copper 1.0mg/L , Iron 0.30mg/L, Zinc
5.00mg/L. Obviously the copper and zinc concentrations allowable in
drinking water would kill fish & invertebrates. Our system provides
under 0.100 mg/L concentration for 5000 gallons. You cannot test
all six metals at the same time because of the synergistic
reactions involved --- the manufacturer tested the three low
concentration metals (lead, mercury & cadmium) together in feshwater &
They next tested the three high metals (iron,copper & zinc) together in
both freshwater and saline. The results are posted on their website.
The tests were performed in US Medical School 's Dept. of
Toxicology under US EPA Standards.
Any further questions on this thread will be done in private email. Email
me at puffie at marine-monsters_com