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PROJECT TITLE:

Sand Island Wastewater Treatment Plant Pilot UV Unit Testing

PRINCIPAL INVESTIGATOR:

Dr. Victor D. Moreland, Water Resources Research Center, University of Hawaii at Manoa (UH)

SPONSOR:

Trojan Technologies, Inc.

PROJECT PERIOD:

02/01/07 - 01/31/09 (Phase IV)


ABSTRACT:

The primary objectives of the UV disinfection pilot tests were to assess the feasibility of the UV disinfection and establish the appropriate design parameters for a full-scale UV disinfection facility to achieve the required enterococci standards at Sand Island. The enterococci standards are 18,000 per 100 mL, based on a daily maximum. The results of the pilot tests were used to design the full-scale UV disinfection facility.

Specific Objectives Included:

Phase 1- Developing UV dose-response relationship for UV disinfection under various influent conditions and to verify the pilot system can achieve the necessary target dose and disinfection level.

Phase 2- Assessing the UV lamp fouling rates, required frequency of cleaning and cleaning wiper efficiency.