water treatment Flashcards
what are the symptoms of hard water
spotting on dishes and glassware, scaling on inside of water heater, clothing looks gray and dingey
what is the cause for yellow, brown or rusty stains on plumbing fixtures
clear water iron (ferrous water) measuring 0.3ppm or more
what are the symptoms of red water iron
yellow to rust color
what are the symptoms of bacterial iron
clumps and balls that may foul plumbing lines
what is the problem if there is a rotten egg state or odor and plumbing lines are black
high amount of hydrogen sulfide
what is the problem when there is blue/green or rusty stains and corrosion of plumbing fixtures. Also pin wholes in copper plumbing lines
acid water
what is the called when there is sand, or cloudy water
turbidity
what is the result of decaying vegative matter
tannins
yellow or brown tint or cast in water supply
what ph level is neutral
7.0
if water measures 6.0 on the ph scale it is
slightly acidic
if water measures 14.0 on the ph scale it is
extremely alkaline
what is included in a water analysis test
hardness iron manganese ph tds
if water has a ph reading of 6.5 or lower that would mean
the water is corrosive
what does gpg stand for in relation to hard and soft water
grains per gallon
if water has less than 1.0gpg it is
soft
if water has more than 1.0gpg it is
hard
if water has more than 10.5 gpg
it is very hard
what is the most common way of of correcting hard water
ion exchange
what is in the ion exchange that corrects hardnes
resin beads that can be damage by freezing,boiling, or drying out
what happens in an ion exchanger
the sodium ions are exchanged for magnesium and calcium ions
what is regeneration
replacing the sodium ions in the ion exchanger
what is multi-media filtration
also know as turbidity filter
silt and dirt, that give water a cloudy appearance are trapped in the filter bed
what is activated carbon filtration
elemental carbon whose particles have a large surface area with high adsorptive qualities
what is activated carbon effective for
adsorbing dissolved organic compounds such as decayed vegetation and run-off which causes unpleasant taste
what is the most effective for dechlorinization
granular activated carbon
what is used in chloronation systems to remove tastes of chlorine
activated carbon filterrs
what is the purpose of a neutralizing filter
raises the ph of acidic water and neutralizes its acidic characteristics
if you have a system where hydrogen sulfide exceeds 3.0ppm what do you need
a chlorination system
what what ph will iron oxidize in water
7.0
