
Veolia and Affinity Water work closely to find solution
ActifloCarb® removes Metaldehyde
Veolia Water Solutions & Technologies has been working closely with Affinity Water to develop a process to remove metaldehyde from drinking water. Metaldehyde, a pesticide used for slug control, is being found in many UK water sources, with a potential risk of non compliance with Water Quality Regulations, which set a maximum concentration of 0.1µg/l for pesticides.
To deal with this issue, Affinity Water has been looking at removal technologies. In December 2012 Veolia installed a pilot scale ActifloCarb® system at Affinity Water’s North Mymms treatment works and, in close cooperation with Affinity Water, operated it for three months during which it consistently achieved metaldehyde residuals of less than 0.02µg/l.
Based on the highly successful Actiflo® high rate, sand-ballasted sludge clarifier, ActifloCarb® adds powdered activated carbon (PAC) to adsorb pesticides. PAC, coagulant and flocculant chemicals are added along with fine sand for weighting the resulting floc which is removed in a lamella clarifier. Most of the PAC is recirculated to minimise operating costs, and the sand is recovered in a hydrocyclone.
“We needed to find a technology to remove metaldehyde,” says Affinity Water’s Process Engineering Science Manager, Richard Lake. “This collaboration with Veolia has been a great success and demonstrated that ActifloCarb® is effective treatment against this pesticide.”
NSI Mobile Water Solutions
- mws@nijhuisindustries.com
- http://www.nijhuisindustries.com
- WINDSOR COURT KINGSMEAD BUSINESS PARK HIGH WYCOMBE Buckinghamshire HP11 1JU GB
About us
Mobile Water Services is a leading provider of temporary water treatment solutions. Our services allow plant operators to have a reliable and secure source of treated water 24/7, 365 days a year, to maintain continuity of supply to core operations.
Mobile Water Services offers an effective and efficient alternative to fixed plants in a wide range of industrial situations and circumstances. Ideal for emergency situations where an existing plant has failed, they can also be used when carrying out planned commissioning, refurbishment or maintenance projects or for multi-year requirements, when the need for temporary but continuous water supply is critical to operations.
We provide a full-service offering with flow rates ranging from 5 m3/hr to 1000 m3/hr. Our solutions include high-quality assets to rent, consumables, spare parts, chemicals, and services. Our vast range of technologies, such as filtration, ultrafiltration deionisation, reverse osmosis, degasing, softening and clarification, are available as pre-packaged solutions on a trailer, skid or container for maximum mobility and rapid response. All pre-engineered with ‘plug and play’ connections for ease of use. The offer comprises a range of containerised tanks, pumps, and accessories to provide a complete end-to-end solution. We also provide transport and logistics, process knowledge, training, and ongoing support during commissioning and operation. Our services enable clients to be as hand-on or hands-off as they need.
Mobile Water Services’ proven track record for rapid response and delivering service excellence is unrivalled and enables our customers to maintain production operations.
Where we supply to
UK Ireland, Europe
Industries we supply to
Chemicals, Energy and Power, Food and Beverage, Metals and Minerals, Paper and Pulp, Pharmaceutical Cosmetics Toiletries
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