Iron Curtain 2.0 Principle Of Operation, Operation Of Aeration System - Hellenbrand Iron curtain system 2.0 Owner's Manual

Iron Filtration System
Aeration/precipitation/multi-media filtration for:
1. Iron Reduction/Removal
2. Manganese Reduction/Removal
3. Hydrogen Sulfide Reduction/Removal
Principle of Operation
The Iron Curtain System uses a three step process of ox-
idation, precipitation, and mechanical filtration for the
reduction/removal of iron, manganese, and hydrogen sulfide.
The process of how the Iron Curtain System does each one
of these separate procedures is the key to the successful
results this product has obtained in the market place. There
are two main components that make up the Iron Curtain
System. They are:
1. Iron Curtain 2.0 Aeration Assembly
2. Iron Curtain Multi-Media Depth Filter
1
The first step in any oxidizing process is to bring the
raw water into intimate contact with a strong oxidant.
This will begin to convert the dissolved element such as iron
or manganese to a physical particle or nonsoluble precipitate.
A strong, inexpensive, environmentally‑safe oxidant is oxygen,
which makes up about 2% of ambient air. To do this, the
Iron Curtain System sprays water through a regulated head
of air in the aeration tank.
2
The second step in this three step process is to
provide adequate reaction or contact
time for the precipitation reaction to go to completion. This
allows time for the iron and/or manganese particles to become
large enough to filter out. The aeration tank with the Iron Curtain
System allows for several minutes of contact time at the rated
service flows, compared to only seconds on other systems.
It should be noted that this reaction time will also be affected
by temperature; the warmer the water the faster the reaction.
A low ph can slow the oxidation reaction of the iron. This re‑
action time may also be affected by the presence of organic
material (such as tannins). If tannins are present, field tests
have shown that they will not be removed and will also
hinder the ability of this system to effectively remove
iron, manganese, and/or hydrogen sulfide. Installation
of this system on water supplies with more than 0.5 ppm
of tannins will void warranty.
3
The third and final step is filtration for the removal
of the precipitates from the water. A WQA Water
Filtration Study Guide states:
"The ideal filter bed would be one with large grains at the top
to prevent the formation of a surface cake and to provide large
pores for course particles and small grains at the bottom to
entrap smaller particles. This allows the entire depth of the
bed to be used as a filter. This also allows for longer filter
runs and faster flow rates. Unfortunately, such an ideal bed,
when consisting of a single media is not possible, the way
to solve this problem is to use layers of media."
The advantages of a multi‑media bed are:
IrOn curTaIn 2.0
1. Longer runs between backwash times.
2. Caking of the bed and breakthrough turbidity are virtually
3. Much higher service flow rates per square foot.
4. Higher degree of clarity because of the heavier, finer filter
The standard Iron Curtain System uses five layers of filter me‑
dia. The top layer is made up of large, lighter weight particles.
The second layer contains a slightly heavier media. The third
layer contains a much heavier media, smaller in size than the
one above. The fourth layer contains an even heavier media.
The fifth layer is a special support bed to retain filter media so
it does not pass through the distribution system, and allows
an even distributed flow of backwash water.
Operation of Aeration System
The Iron Curtain System introduces air into the aeration tank
and bleeds off the old head of air automatically. A timer
controls the air recharge cycle and how frequently it occurs.
The timer turns on the air pump, opening the drain port and
the top air recharge port of the aeration tank. The air pump
runs for a pre‑set amount of time, replenishing the head of
air and discharging excess water and/or air to drain.
Advantages Over
Other Systems
. The original systems was tested and validated by WQA
2. Uses no chemicals or salt.
3. Eliminates the need for air injectors, venturis, or micron‑
4. No floats or air volume controls are used to regulate air
5. Two‑tank system consisting of a pressurized aeration
6. 0V aeration pump to recharge aeration tank.
7. "Piggy‑back" plug allows control valve to be plugged into
8. Can be used on shared wells, municipal water supplies,
9. Higher service flow rates.
10. Better filtration results.
. U.S. Patent #B 5,096,596 and patent pending.
2. Variable settings on air recharge that is independent of
eliminated.
media in the bottom.
under their S‑200 Standard.
izers.
volume in aeration tank which "foul" from iron.
tank and multi-media depth filter.
same outlet.
or with buried pressure tanks without additional equip‑
ment.
backwash frequency.
3