ECMI helps clients manage
biofouling in facilities utilizing large water intake systems to
provide process or cooling water.
The following discussion is focused on power facilities,
however facilities using any amount of feed water from an intake
system will apply. AquaKLEAR units are able to treat and manage
biofouling in piping systems up to 78" in diameter.
Modern power stations employ various heat exchangers in
the process of power generation. The larger of which are the steam
condensers in power stations that use steam turbines for the power
The cooling media used in most condenser application is water. If
large rivers with constant water flow are available, then fresh water is
used. The water has to be treated to remove suspended solids and
chemically treated to prevent corrosion and to reduce hardness, to
prevent the formation of deposits in the condensers and oil heat
exchangers. When river water is not available power stations are
designed to use seawater as cooling media. In such cases condensers and
heat exchangers are affected by bio fouling.
Water Treatment in Power Stations
Water is softened on a large scale by the addition of
just enough lime to precipitate the calcium as carbonate and the
magnesium as hydroxide, whereupon sodium carbonate is added to remove
the remaining calcium salts. This operation is costly and produces
large volume of calcium carbonate that has to be trucked away. A
power station situated near hard water river can produce as much volume
of calcium carbonate to fill 12 trucks a day.
Cooling water produced in this way has to be treated again before
returning to the river to comply with regulations. Water treatment
can be minimized with the use of AquaKLEAR.
If the cooling media is seawater the operators are faced
with different problems. Bio fouling is the main problems facing
power stations situated near the coast. Like ships and boats; power station
condensers and other heat exchanger efficiency is reduce by the effect
of bio fouling.
Organisms that cause bio fouling can be subdivided into minute
microfoulers and larger
Microfoulers (e.g. sticky
bio films of bacteria) initiate the process by colonizing new surfaces.
These then allow the larger macrofoulers (e.g. barnacles, limpets
and seaweeds) to gain a foothold.
The effect begins with the formation of a
bacteria film; a transparent gel that can grow to several centimeters
thick. This reduces the heat transfer efficiency and facilitates the
attachment of macrofoulers.
The larva of mussels, barnacles, limpet, and seaweed; uses the bacteria
film to attach themselves to the pipe and condensers surfaces. They then
metamorphosize to the adherent species. Without the presents of the bacteria film
the larva fragile tentacles will not be able to get a foothold and will
be swept away by the flow of water.
In an attempt to prevent this; seawater is treated with
chlorine, this can damage sea fauna in the power station vicinity and
the quantities of such treatment is strictly regulated.
Power stations have been plagued with
Tiger mussels. This mussel is large enough to block the condenser
tube when it becomes detached and is carried to the condenser; this
requires costly manual cleaning reducing the power station output.
The introduction of AquaKLEAR will prevent the formation of the bio film and kill
the larva by osmosis thus braking the larva cycle.
AquaKLEAR is an electronic water
treatment device that generates an electric field that is applied to
all suspended particles flowing through the ferrite ring.
The electric field is applied
longitudinally and its effect on dissolved ions is over the entire
the plumbing system.
AquaKLEAR has been working
successfully in biofouling applications and commercial swimming
pools internationally for over 4 years.
AquaKLEAR with Hydropath Technology:
Kills biofouling causing organisms as they
pass the AquaKLEAR unit.
Will continue to control biofouling
within the system by controlling microfouling.
Will help maintain a healthy
ecosystem by reducing or eliminating the need for harmful chemicals
in discharge water.
Will remove limescale from the piping
Continues to keep limescale from
forming within the system.
Keeps equipment operating at peek
Reduces or eliminates costs for chemicals to
control biofouling organisms
Reduces scheduled cleaning cycles
of facility equipment.
We can provide more in-depth
material covering this subject upon request.