Severn Trent introduces technology developments in Singapore

These include the TETRA® DeepBedfiltration system, which is a down flow sand filter for the filtration of effluent from municipal wastewater treatment plants. The technology offers process flexibility and high efficiency backwash for the removal of suspended solids and other insoluble contaminants. For nitrate-nitrogen and suspended solids removal, the process is easily upgraded to the TETRA® Denite® system, a fixed-film biological denitrification process. The company says that the Denite system integrates well with other plant treatment processes to provide superior total nitrogen and phosphorus removal.

Severn Trent Services is also demonstrating its electrochlorination technology. Since 1988 the company has installed more than 3,500 ClorTec® on-site sodium hypochlorite generating systems worldwide. The company has also developed a cost-effective system for the on-site production of sodium hypochlorite for use in swimming pools, cooling towers and food and drink applications – the ClorTec SCT mini on-site sodium hypochlorite generating system. This compact product offers a safe and reliable alternative to the transportation of hazardous chemicals and is easy to maintain. 

Underdrain filters for drinking water applications will also be on display. The TETRA® LP Block a dual-parallel lateral underdrain filter floor for RGF and GAC filters, is extremely popular with plant owners for their low headloss, lightweight construction and easy installation. The system provides good distribution of both backwash air and water to offer more efficient bed cleaning and lower operating costs. The GroutGrip and new Anchor-Rite® design features eliminate the uncertainty of grout installation and ensure increased adhesion to the filter floor.