City completes new facility advancing protections for our ocean
HONOLULU – The City’s Department of Environmental Services (ENV) celebrated the completion of the Sand Island Wastewater Treatment Plant Secondary Treatment Phase 1 with a blessing at the facility Tuesday, August 11. The state-of-the-art technology gives ENV even more power to keep our beaches and ocean clean.
“Our goal is to modernize this City and to set it on the right trajectory into the future,” said Mayor Rick Blangiardi. “This is an investment in state-of-the-art technology that is beneficial for our residents today, for generations to come, and for the environment. We are extraordinarily proud of the work done by the brilliant engineers and hard-working team at the Department of Environmental Services. We also want to thank our private partners AECOM Technical Services, Hensel Phelps Construction, and Yogi-Kwong Engineers/SJ Construction Consulting, LLC., for spearheading this vital project, because it is the right thing to do for our island home.”
Mayor Rick Blangiardi and ENV Director Roger Babcock joined project contractors, City engineers and media to commemorate the milestone with a Hawaiian blessing led by Kahu Kordell Kekoa.
The Sand Island WWTP is the largest treatment facility in Hawaiʻi, processing nearly 56 million gallons of wastewater from homes and businesses across Honolulu every day. The new facility uses a super fine filtration system called Membrane Bioreactors (MBR) to separate solids out of the water more effectively than older methods. After the water is filtered, it is disinfected with UV light before being safely returned to the ocean. The solids that are removed are recycled into pellets, turning waste into a resource instead of throwing it away.
The upgrade reflects the City’s ongoing investment in Oʻahu’s essential infrastructure and commitment to protecting public health and the environment. It also keeps Oʻahu on track with commitments made under a 2010 Consent Decree to modernize wastewater treatment.
“This facility is a major milestone in our mission,” ENV Director Roger Babcock said. “The technology allows us to treat wastewater to a higher standard, and our team and contractors are proud to see it completed.”
The project was designed by AECOM Technical Services, built by Hensel Phelps Construction and managed by Yogi-Kwong Engineers/SJ Construction Consulting, LLC. Sand Island WWTP’s Secondary Treatment Phase 1 is fully functional and entering the final commissioning phase. Here is a list of the facilities:
· Primary Effluent Pump Station/Blower Building
· Fine Screening
· Process Reactors
· Membrane Bioreactors
· MBR Service Building
· Thickener Building
· Odor Control
· Effluent Channel and Pipe Tunnel
· Electrical Upgrades
After the blessing, guests toured the MBR facility to see the treatment process up close.
About the Department of Environmental Services
The City and County of Honolulu’s Department of Environmental Services (ENV) manages wastewater and solid waste systems that serve the island of Oʻahu, which include 2,100 miles of sewer lines, 72 wastewater pump stations, nine wastewater treatment plants, three solid waste transfer stations, seven refuse and recycling convenience centers, seven solid waste collection base yards, one active landfill, and one waste-to-energy facility (H-POWER). ENV is dedicated to protecting public health, preserving the environment, and ensuring the sustainable management of Honolulu’s essential infrastructure through innovation, efficiency, and community partnership.
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