Client-1:
To whom it may concern
Having used Filtration Medium
DMX-065 in our two iron and manganese removal plants on the
South West Health Campus site for the past year it is without
difficulty that I am able to recommend the product.
The plant for 4 years had operated
unsuccessfully with potassium permanganate, and we had reached
total frustration in trying to find a system to satisfactorily
remove our high levels of both iron and manganese in a
cost-effective manner.
With the use of the DMX-065product
the bore water used for reticulation has been of a consistently
clean quality, and our operating costs have been reduced.
I would therefore recommend anybody
with a requirement to remove iron and manganese from water in a
bore/ reticulation system, to seriously consider the use of this
product.
Yours faithfully
Client-2:
Our company is contracted to carry
out the Dewatering at a hotel site.
Strict environmental laws prevented
us from discharging the groundwater from the site into the river
or stormwater system. The initial water sampling did not meet the
acceptable criteria of the River Trust or the Department of
Environment. The unacceptable criteria were the extremely high
Iron levels.
After an extensive search for a
solution that was both effective and cost efficient we were
advised to try the water filtration media DMX-065. We were assured
that the product DMX-065 would remove the iron and manganese to a
level that would enable us to discharge the treated water into the
River as required by the DoE and the River Trust.
The filter system was commissioned
within 1 day with immediate results. The River Trust and the DoE
were sceptical at first but soon became very interested in the
filter system once the results were maintained.
A number of representatives from
their departments have attended the site to see the system
working. They are receiving all testing reports and are treating
our project as a trial for possible future use in their
Departments.
The filter system has now been in
place since July 2004 and is pumping 10,800 l/h of water directly
into the River. The raw water at its highest was 14 mg/L and the
treated water is now at 0.30 mg/L.
Apart from the amazing results we
have received from day one and continue to receive, the filter
system itself was not expensive compared to the other methods
available. We do not have to adjust or touch the filter system
other than to ensure that the chlorine level is maintained.
The DMX-065 filter media has made
treating the discharge water on this project very simple with
excellent results. The DoE & the River Trust were delaying this
major project until a solution could be found. Without the filter
system the discharge problem would have become very expensive and
complicated.
We would recommend the DMX-065
filtration media for removing Iron and Manganese.
Project Manager
Client-3:
VVW Processing Innovation
VVW, an export abattoir has suffered with high iron
levels in its bore water since it was originally built in the late
60’s. A number of systems have been used to reduce iron content
but fouling of the heat exchangers has continued to occur despite
these treatments. Hot water heat exchangers have required cleaning
every 3 weeks to maintain efficiency.
This could be stretched to 6 weeks but performance
dropped as time was extended. Within six weeks heat exchangers
became fouled with a pitch black, soft material about 1mm thick.
Another problem was the manganese build up in the internal walls
of pipe work. This would build up to a point it would flake off
the pipe wall giving dirty water on the production floors.
No suitable established technology could be
identified to adequately reduce the iron content of their bore
water so engineering staff at VVW looked for novel solutions to
this problem.
The solution
VVW engineering staff decided to trial a new
technology. They installed a new water filtration system
specifically designed for treating bore water for Iron and
Manganese removal. This is a new product on the market and has
approval from the US Water Quality Association to the standard
NSF/ANSI 21 for potable water use. This certificate of validation
for the new product known as DMX-065 also states the
material safety of the media has earned the gold seal from the US
Water Quality Association.
The iron and manganese removal is due to a
catalytic reaction and for the reaction to take place the water
has to have and oxidising agent added. Sodium Hypochlorite is the
cheapest, most readily available and easy to handle product for
this purpose. For drinking water use this also chlorinates the
water to drinking water standards.
The flow rate of water through the filter media (DMX-065)
is critical and is much slower than required for normal silica
sand. This is to allow time for the reaction to take place. The
backwash also needs to have the oxidising agent added at the
appropriate rate. If this is not done there is a time delay for
the DMX-065 to work effectively when switching back to
filter mode. Prior to initial use the DMX-065 needs to be
activated.
Soaking it in high chlorine solution for a minimum
of 30 minutes, then backwashing prepares the media for use.
Soaking for longer, 4 to 8 hours gives speedier results when put
in use.
The VVW system uses 12,000 Kg of DMX-065 to
process 1000 Kl of water per day. The iron level in the water is
consistently reduced from 15ppm to 0.05 ppm
The slower filtration speed required the
installation of larger filters. Some decommissioned filters were
cleaned out and recharged with the DMX-065. As regular
backwashing and correct oxidising agent injection is so critical
to the operation an automated system was installed.
The benefits
Benefits
identified from the use of this novel filtration media have been:
-
Good availability and technical
support
-
Indefinite period for heat
exchanger cleaning. After 6 months operation the heat
exchangers were stripped and the service company based in Perth
stated they have never seen heat exchangers as clean anywhere
after six months operation. No cleaning was necessary and the
heat exchangers were reassembled using new gaskets.
-
The reduction in heat exchanger
cleaning saved $17,000 per annum
-
The new system required less
operating cost over the old system saving $31200 per annum.
-
The residual iron level is easy
to control by adjusting the flow rate through the filter.
-
Simple control of backwashing and
Sodium Hypochlorite injection is required to maintain efficiency
of the DMX-065 and give it an effective life of 7 years.
-
Removes Manganese equally
effective as it removes Iron.
The Cost
The cost of using
DMX-065 is easily offset by the savings in maintenance
costs on the heat exchangers and running the old filtration
system. As a result VVW payback on investment is estimated at 25
weeks. This does not include energy savings obtained by having
clean heat exchangers. The energy savings achieved by having clean
plates would be quite substantial. This then brings the total
project pay back to be less than two years.
Client-4:
Dear Sir;
Further to your
request for feedback on the performance of the DMX-065 in
the domestic water purification on our site, we have the following
comments:
The change over
from greensand to the DMX-065 was no problem.
The levels of
both Fe and As have decreased since your product has been in use
in the filters.
The operation of
our plant has not really changed and not given us any problems.
I trust your
product will be successful in other plants as well.
Yours faithfully;
Client-5:
I am writing this
letter to let you know how impressed we are with your product
DMX-065.
We are treating 1
giga-liters of bore water per day for use in our abattoir and
boning rooms. We could not meet the WHO standards with our old
system and to retain our export license we had to upgrade our
system. We experimented with using flocking agents and sand
filters but still could not get good results at economic operating
costs.
Since using your
product, our water containing 15 ppm Iron can be reduced to 0.05
ppm at a rate of 70 cubic meters per hour using 3 filters. It now
satisfies the WHO standards. We have also seen dramatic reduction
in the Manganese content in our water. Our heat exchangers on our
old system had to be cleaned every 6 weeks to remove the iron/
manganese sludge from the plates. We stripped the heat exchangers
after 6 months operation using your filter media and had nothing
to clean.
Although sand
media in the filters would not do the job it is interesting to
note the price difference between your product and sand is offset
in 24 weeks due to the savings made in the reduction of
maintenance. This saving is actually higher as the energy savings
by having clean heat exchanger plates have not been included.
In concluding, I
thank you for the technical advice you have given and I wish you
well with your product.
