Honouliuli Wastewater Treatment Plant Secondary Treatment

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Client: City and County of Honolulu
Location: Ewa Beach, Oahu
Project Type: Land Development, Water and Wastewater

The Honouliuli WWTP is treating about 26 mgd, of which approximately half is treated to secondary treatment levels and re-used and the remaining half is treated to primary treatment levels and discharged to a deep ocean outfall.  The EPA Consent Decree mandates that this facility be upgraded from partial secondary treatment to full secondary treatment.  The City and County of Honolulu’s project involves modernization and capacity upgrades to accommodate flows through 2035 and incorporate considerations for build-out through 2055.  The project was divided into 4 major parts to meet City requirements on solids management and Consent Decree compliance dates.  RMTC manages all of the packages.