|Wastewater Reclamation Facility: Laie WRF|
The Laie Wastewater Reclamation Facility (LWRF), put in service in 1997, provides state-of-the-art wastewater reclamation, including ultraviolet (UV) disinfection.
The facility provides tertiary treatment. Wastewater flows from the pump station to the headworks, then to the secondary treatment process, and finally through effluent filters and UV disinfection. The reclaimed water is recycled within the Laie community for irrigation and ground water recharge. The resulting sludge is mixed with green waste and composted on site.
Since 2006, the City and County of Honolulu has operated the LWRF and wastewater system through a cooperative agreement with Hawaii Reserves Inc. (HRI). The private-public partnership implements ideal technology for low-lying coastal areas and provides wastewater collection and treatment service at a significantly lower capital cost. HRI, through Laie Water Works, continues to provide potable water to the area.
Expansion of the wastewater collection system in Laie removed hundreds of old cesspools. In addition, most homes in Laie utilize a new, low-pressure technology for wastewater collection that reduces the high inflow and infiltration typically found in traditional gravity-flow sewer systems, adding environmental, public health and safety benefits. The secondary treated, filtered and disinfected wastewater effluent is discharged to a second party for reclamation and/or disposal purposes.
LWRF operates under a Wastewater Management Individual Permit (WWM), Permit No. HI05WWIP213, effective as of July 14, 2008, and expired July 14, 2013. The Hawaii Department of Health granted an administrative extension to the permit effective July 15, 2013, and will expire when the new individual permit is issued. The WWM permit authorizes the City and County of Honolulu to operate the wastewater treatment works and sludge processing facility in accordance with effluent and sludge limitations, monitoring requirements and other permit conditions.