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Category Archives: Iron Removal

Bay Hotel, Camps Bay

A2V in partnership with Conns Water Solutions designed and installed a water treatment plant to treat borehole water containing iron and manganese to drinking water standards for use in the hotel. The water was also stabilized to prevent corrosion to the hotels aging pipe infrastructure.

Iron removal system

 

 

KWV Water Treatment Plant, Paarl

A2V in joint venture with Conns Water and Sopura, designed and installed a water treatment system to remove iron and manganese from borehole water using a catalytic filter media called DMI-65.

The plant is design to treat 25m3/hr using Chlorine dioxide as an oxidant and disinfectant to minimize the risk of chlorine byproduct formation. A pH adjustment is also included in the process to improve the removal efficiency and stabilize the water to prevent corrosion downstream.

This was a fast track project during the water crisis in 2017 and was commissioned within 4 weeks from confirmation of order.

Iron removal system

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Ceres Fruit Processors

A2V in joint venture with Conns Water and Sopura, designed and installed a water treatment system to remove iron and manganese from borehole water using a catalytic filter media called DMI-65.

The plant is design to treat 40m3/hr fed directly directly from the borehole pumps via the system to a reservoir. Chlorine dioxide, produced by a generator on site, is used as the preferred oxidant and disinfectant to minimize the risk of chlorine byproduct formation. In line pH adjustment is critical for optimum manganese removal.

This was a turnkey project including civil and building works.

Chlorine dioxide dosed into a mixing pipe prior to filtration by DMI-65

Chlorine dioxide dosed into a mixing pipe prior to filtration by DMI-65

DMI-65 filters

DMI-65 filters

Iron Removal for Domestic Boreholes

In response to numerous requests from borehole owners, we have developed a low cost system for removing iron from water in domestic applications.

Our system uses chlorine as an oxidise iron and manganese in the water prior to passing it through a specialized catalytic filter media (DMI-65) which promotes the oxidation of iron, causing it to precipitate out into he media bed. The iron particles are then back washed from the filter in the same way as a pool filter is back washed. DMI-65 is highly effective and is unique in that it does not require regeneration, unlike many other iron removal medias on the market. Indeed, the media has a life span of up to 10 years if operated correctly, making electricity the only operating cost of the system.

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Chlorine is dosed as Calcium hypochlorite in slow release tablets through an in-line dosing system. This has the advantage maintaining a residual concentration in the water downstream, thereby disinfecting it and preventing re-infection.

Our system is available in two sizes 300LPH and 500LPH and can be supplied with an automatic or manual filter head.

For more information please visit our on-line store.

 

 

Albion Chemicals – Iron Removal Plant

Albion Chemicals are manufacturers of of bleach and other cleaning products. Cape Town municipal water is used as the main ingredient for all of their products.

Albion were experiencing a high number of returns on their products due to ‘blow-outs’ of the product bottles. A number of water and product samples determined that the most likely cause for the ‘blow-outs’ was the presence of iron in the make-up water. Indeed, iron levels in the municipal supply were found at times to exceed 2mg/L and the SABS standard for drinking water.

The City of Cape Town uses ferric chloride as a coagulant on many of its water treatment plants. At times the process is not managed correctly and either excess ferric chloride is present in the water; or flocs are carried over from the settling process into the reticulation system.

A2V designed a filter system using a specialized catalytic media, designed for the removal of iron and manganese. The media  acts as an oxidation catalyst causing the metals to precipitate within the media bed,consistently removed iron to <0.01ppm.  It is also effective at removing arsenic, aluminium and other heavy metals.

The catalytic media uses an oxidation, adsorption and filtration process similar to Greensand and Birm, but to a much higher removal efficiency and significantly lower life cycle cost. The media lasts for 5 to 10 years and does not require regeneration. The entire process is simpler to operate and less costly to install than traditional iron removal systems.

Iron removal filters using catalytic media

Mont Rochelle Water Treatment Plant

Mont Rochelle Hotel and Winery

A2V designed, supplied and installed a water treatment plant to treat borehole water from two existing boreholes on the site to potable standards.

The system uses a specialized filter media (DMI65) to remove oxidised iron and other metals from the water. Chlorine dioxide is used as the oxidant and disinfectant of choice due to there being no risk of the formation of chlorine byproducts (TCAs) which could affect the wine negatively.

The existing infrastructure was reused as far as possible in order to keep the cost of the system to a minimum. The plant was commissioned in November 2014.

 

Mont Rochelle Water Treatment Plant