The original wastewate facility was constructed in 1981 to serve the Poipu resort area and designed to handle 500,000 gallons of wastewater per day. The effluent is used to irrigate the Kiahuna Golf Course. In 2004, the treatment capacity was increased to 1.0 mgd to accommodate the increased development in the area. Aqua Engineers, Inc. replaced the conventional activated sludge process with the Kaldnes Moving Bed Bio-reactor (MBBR) fixed film process. Cloth disk filters and ultraviolet disinfection were installed to upgrade the process to produce R-1 effluent. Briant Construction, Inc. installed new welded stainless steel tanks and equipment for the MBBR process. The tanks were constructed using a new construction method from Italy to reduce costs by 30 percent. Aqua Engineers, Inc. continues to operate the facility, which has become more efficient as a result of the upgrade.

Aqua Engineers was awarded the “Privatization of the Wastewater Treatment Plant and Distribution System at Schofield Barracks”, on the island of Oahu, Hawaii. The contract involves operation and ownership of the Schofield Barracks WWTP, 17 WWPSs, approximately 70 miles of gravity sewers, and numerous grease traps and oil/water separators. The Schofield Barracks WWTP has a current design capacity of 4.2 mgd. The scope of work of our contract includes upgrading the existing secondary R-2 treatment plant to R-1 standards and installing a SCADA system within the first 2 years of the contract. Additional projects scheduled for the first 2 years include pump station upgrades, oil/water separator and grease trap upgrades, and development of a comprehensive collection system maintenance and repair/rehabilitation project prioritization program.