Conditional acceptance for re-use in USA

WEDECO AG reports that its US subsidiary - Wedeco-Ideal Horizons Inc, of Vermont - is the first UV company to have received a 'conditional acceptance' in the US for its TAK55 UV disinfection system for for wastewater re-use.

This follows a revision of the National Water Research Institute guidelines

by the National Water Research Institute (NWRI) and American Water Works Association

Research Foundation (AWWARF) in 2000. The TAK55 system can now be used for the

disinfection of filtered wastewater for water recycling.

Ultraviolet Disinfection – Guidelines for Drinking Water and Water Reuse

was published by the National Water Research Institute (NWRI) and American Water

Works Association Research Foundation (AWWARF) in December 2000.

The international professional engineering firm CH2MHill was engaged by WEDECO

to conduct an independent evaluation of TAK55’s system performance, to demonstrate

that the technology could meet the performance requirements dictated by the

revised NWRI/AWWARF Guidelines. The testing of the system was carried out with

the support of the Orange County Water District at its Green Acres Project (GAP)

in Fountain Valley, California.

The TAK55 system uses high performance low pressure, high intensity UV lamps.

Distinguishing features and achievements include:

  • An extensive global track record disinfecting primary, secondary and tertiary

    treated municipal effluent to a wide variety of regulatory standards

  • Independently certified UV power output and variable control from 50 –

    100% intensity

  • A unique, pneumatically driven chemical-free lamp cleaning system proven

    worldwide to keep TAK55 systems clean and operating at peak performance

Operation and maintenance friendly separation of system mechanical and electrical

components for long term, reliable operation and ease of service.

As the first UV technology accepted by the DHS for Title 22 in accordance with

the new NWRI/AWWARF Guidelines, design engineers and municipalities in California

now have the comfort of knowing that a design including the TAK55 UV system

can be approved by the DHS. More importantly, they can feel confident that the

water delivered from these systems will meet the strict requirements imposed

by the State of California for water reuse.

This assurance was an important factor for the City of Lincoln, developer Del

Webb California Corporation and the California-based engineering firm ECO:LOGIC,

in selecting the WEDECO TAK55 system for a planned wastewater reuse facility.

The design flow for the Lincoln UV system is 6.7 million gal/day (MGD), or

1,057 meters3/hour (m³/h) with provisions for a future upgrade to 8.04

MGD (1,268 m³/h). For this project, WEDECO will deliver all required electrical

control and power supply equipment pre-installed and tested in an insulated

and air-conditioned prefabricated building structure. This delivery concept

minimizes the system installation, start-up and field-testing time and is more

cost-effective than a traditional on-site assembly approach. The structure is

also designed to provide a perfect environment for the operation of the electrical

equipment while providing easy access for maximum system serviceability.

‘The receipt of this Acceptance represents a very important milestone in WEDECO’s

North American business development activities. In California and the rest of

the southwest United States, the scarcity of water and rapid population growth

will drive a corresponding growth in this important market segment for water

reuse,’ said Mr Werner Klink, CEO of WEDECO AG Water Technology. ‘We are pleased

that our TAK55 system has been selected for the Lincoln project. This demonstrates

that our research and development activities in this field have been well worth

the effort.’

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