n July 21, 2022, 60 members and guests of the American Society of Civil Engineers (ASCE) Hawaii, American Water Works Association (AWWA) Hawaii Section, and HWEA gathered for a joint luncheon. The attendees listened to a presentation by Dr. Tao Yan on Tracking COVID-19 Transmission Dynamics and Variant Development via Wastewater Surveillance.
By Lorna Heller
Water conservation has always been top of mind for businesses and government agencies to reduce their operating costs and to be better stewards of the environment. For those on O‘ahu, water conservation has become imperative as a result of the Red Hill water contamination crisis. In April 2022, the Board of Water Supply (BWS) issued a “water alert” that is still in effect, urging O‘ahu residents and businesses to reduce their fresh water use by 10 percent.
The project consists of upgrading and expanding the existing Honouliuli Wastewater Treatment Plant (HWWTP) to allow for all wastewater effluent to meet secondary treatment standards at HWWTP. The new or upgraded at- and below- grade structures for Phase 1B include the Aeration Basins, six (6) Secondary Clarifiers, a Secondary Blower Building, a Mixed Liquor Distribution Box, Primary Effluent Junction Box, an Effluent Division Box, an Effluent Flow Meter Vault, Secondary Effluent Junction Box Modifications, a Centralized Emergency Generator Building, a Primary Switchgear Building, a Secondary Process Pump Station, and associated utilities and pipelines to be installed by both pipe jacking/micro-tunneling and open excavation methods. The scope of work also includes providing a complete, functional process control system including the supply, procurement, installation, calibration and testing of the control system network, instrumentation, and signal systems.