Articles & Case Studies

MOBILE WATER FILTRATION - GETTING TO THE SOURCE OF DRINKING WATER CONTAMINATION

Posted: Wednesday 5th October 2016

Water for drinking purposes has become a very valuable resource. Ground water sources have therefore become the norm for the supply of drinking water but are often variable in quality as they are influenced by adverse environmental conditions. Worsening conditions, such as the increase in sporadic and flash flooding, is resulting in heavy contamination of ground water due to sewer overflows and agricultural run offs.

Water utility companies are bound by legislation to provide our homes with water that is considered 'wholesome' for drinking, cooking and washing. This means that water must not contain any micro-organisms or a concentration of substances that may be potentially dangerous to human health. Breaches of limits in turbidity can ultimately result in a bottled water notices being imposed.

Aesthetically, on the surface nobody likes the look of murky water. However it is what lies within the water that is far more alarming. Such an increase of suspended solids in ground water helps the attachment of toxic organic compounds such as metals, pesticides and disease-causing microorganisms and parasites.

One such parasite, Cryptosporidium, is reported to be the most important new contaminant of which water utility companies need to take control. Commonly known as Crypto, this nasty parasite causes the diarrheal disease cryptosporidiosis.

There are many species of Cryptosporidium that infect animals, some of which also infect humans. The parasite is protected by an outer shell that allows it to survive outside the body for long periods of time and makes it very tolerant to chlorine disinfection. The parasite is commonly spread by drinking and recreational water. The risk from crypto is recognized not only by water utilities but by food and beverage producers alike.

With outbreaks of this parasite reported in the domestic water system as recently as the summer of 2015 in areas of northern England, it is essential to eliminate the turbidity of water in order to effectively disinfect it with UV for drinking purposes.

Amiad Water Systems UK, in conjunction with its partners Water Technologies, has been working with an Irish based drinking water distribution provider to install two complete containerised water filtration systems using the recently performance enhanced Amiad AMF micro fibre water filtration technology.

These water filtration containers are designed for filtering water from various sources to potable water quality. All components are installed inside a standard container for easy mobility between installation sites. In order to operate the system the user only needs to connect the container to a pressurised water and electricity source and the potable water network.

The AMF technology is used extensively as a Crypto barrier in the UK by many municipal water companies. In Europe, it has become common to see municipal water companies installing a two stage barrier system to provide protection.

The improvements to this AMF technology has enabled Amiad to produce a cassette providing a reliable 3 log reduction. The AMF systems also sit well alongside high intensity UV supporting UVT by reducing turbidity as well as providing a secondary Crypto barrier.

Introducing a new plant to a process means interfacing with existing site BMS/Scada systems. This is always a pre- requisite of either static or mobile filtration plants and the AMFs technology is designed with this in mind. The AMF can be configured as a duty/ slave/ multi-slave so any flow can be accommodated by what effectively is a modular system that can be integrated by a simple plug in interconnection.

The equipment is DWI, NSF compliant and supported globally by either Amiad subsidiary companies directly or its partners in over 80 countries worldwide.

Packages can be containerised quite easily incorporating pre-filtration as well as integrated backwash systems. Turbidity and flow measurement can be incorporated, meaning the filtration units can be deployed quickly in the event of a specific problem no matter how remote the site. The plant can be operated from a locally generated energy source if required. The container also contains the necessary accessories for operation including electrical and solenoids control boards, PLC with HMI screens, AMF auxiliary system for back-flushing, container heating system and flood alarm.

The AMF technology is also compact; a single unit can be installed in a 20 foot container and a duplex system in a 40 foot standard container, making it the ideal partner for integrated drinking water system providers who ship worldwide.




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November 2018

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