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HONOULIULI WWTP DIGESTERS, ODOR CONTROL GO OPERATIONAL

 

(Wednesday, April 28, 2010) Mayor Mufi Hannemann announced today the completion of the new Solids Handling Facility and Odor Control Systems at the City's Honouliuli Wastewater Treatment Plant in Ewa.

"This is just another example of my administration's priority on basic wastewater needs and infrastructure improvements," Hannemann said.  "These projects will accommodate projected population growth in the Leeward area, as well as improve the plant's capabilities."

      Three anaerobic digesters and two odor control units went operational a few weeks ago.  This new facility replaces the old, energy inefficient system known as low pressure oxidation that generates a burnt leather smell.  The expanded solids handling facility is expected to accommodate projected population growth in West Oahu through 2020.

      These new anaerobic digesters utilize microbes to break down the biosolids in an oxygen-free zone.  Anaerobic digestion is widely used as a renewable energy source because it produces methane.

      "In keeping with the 21st Century Ahupua'a concept," Hannemann added, "our next step is to move forward with a cogeneration facility to make use of the methane to produce energy."

            The Honouliuli WWTP, which was put in service in 1984, is one of nine treatment plants owned and/or operated by the City.  The plant has been treating approximately half of the incoming wastewater to a secondary level since 1996.  ENV provides the Board of Water Supply's Honouliuli Water Recycling Facility, which was dedicated in 2000, with at least 13 million gallons of secondary treated wastewater that produces R-1 recycled water for irrigation and RO (reverse osmosis) recycled water for industrial uses.  

Honouliuli WWTP processes about 27 mgd of wastewater daily, servicing homes and businesses from Red Hill to Ko Olina, including Mililani to the north, with the exception of military facilities at Pearl Harbor and Campbell Industrial Park.

      The City invested $1.2 billion in its wastewater infrastructure the past five years and has budgeted another $1.6 billion over the next six years.

      Parsons, who handled the construction, will finalize its punch-list items by July 31, 2010.  The total cost of the projects is approximately $50 million.

  

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Contact:  Markus Owens, ENV Public Communications Officer, 768-3454