2013-10-21 15:58:39 - ActifloCarb removes Metaldehyde
Marlow, UK, 21 October 2013 – 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.”
Visit www.veoliawaterst.co.uk for further information on ActifloCarb® and other treatment solutions.
About the company:
Veolia Water Solutions & Technologies is the Veolia Water subsidiary specialised in technical solutions and design & build projects for water and wastewater treatment, for industrial and municipal clients. Veolia Water Solutions & Technologies recorded revenue of €2.4 billion in 2012.
Veolia Water, the water division of Veolia Environnement, is the world leader in water and wastewater services. Specialised in outsourcing services for municipal authorities, as well as industrial and service companies, it is also one of the world’s major designers of technological solutions and constructor of facilities needed in water and wastewater services. With 89,094 employees, Veolia Water provides water service to 100 million people and wastewater service to 71 million. Its 2012 revenue amounted to €12.078 billion.