Arsenic is a naturally occurring element found in the earth’s crust. As water flows through certain rock formations, the arsenic can dissolve and be carried into underground aquifers, streams or rivers that may be drinking water sources. Arsenic is a health hazard and drinking water with high levels of arsenic can cause skin damage, circulatory problems and an increased risk of cancer.

DMI-65, a catalytic filtration media with ferric chloride and sodium hypochlorite dosing, successfully reduces arsenic from groundwater sources to less than 0.001 mg/L, making the water suitable for human consumption.

DMI-65 also removes iron and manganese, the build up of which results in very high maintenance overheads, loss of production and potentially system failure. DMI-65 efficiently removes dissolved iron to almost undetectable levels of only 0.005mg/L and manganese to 0.001mg/L, as well as particulate, effectively removing this risk.

The infused technology of DMI-65 promotes the highest oxidation rate of any catalytic filtration media. This permits a significantly higher water flow rate to achieve the same level of iron and manganese removal. DMI-65 can operate at linear filtration velocities up to twice that of conventional media with a corresponding reduction in capital equipment costs.

DMI-65 also has higher iron and manganese load capacity which can extend the duration of filter runs and the time between backwashing, thereby reducing downtime, operating expense and wastage.

The media operates with a continuous injection of sodium hypochlorite at low residual levels (0.1 to 0.3mg/L) which eliminates the need for potassium permanganate.

High-quality water at a reduced cost

The total cost of the iron and manganese removal water filtration system is significantly less than alternative solutions. The effectiveness, but relative simplicity, of DMI-65 based systems reduces the upfront capital expenditure on plant complexity, as well as the ongoing operational expenditure in chemicals, power and backwash wastewater recovery.

DMI-65 has a stable and satisfactory performance at pH 5.8 to 8.6 and a maximum operating temperature of 113°F (45°C), which reduces the need for investment to alter the operating environment.

DMI-65 is not consumed in the treatment process, giving it an expected operational life of up to ten years, providing considerable advantages over other processes or media. Over the five to ten year period, through many backwashing operations of the bed to remove retained solids, an attrition loss of the media occurs by contact between particles and
mechanical abrasion.

This partner content is brought to you by Quantum Filtration Medium. For more information, visit

Charlotte Pordage is Editor of Utility magazine, a position she has held since November 2018. She joined the team as an Associate Editor in October 2017, after sharpening her writing and editing skills across a range of print and digital publications. Charlotte graduated from Royal Holloway, University of London, in 2011 with joint honours in English and Latin. When she's not putting together Australia's only dedicated utility magazine, she can usually be found riding her horse or curled up with a good book.

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