Students: Jonathan Hartford, Monick Estrada, Shawn Eby, Kaytee Villafranca, Christian Osentoski, Jesse Oakes
Faculty Advisor or Community Project Lead: Stephen Nuss, Osama Obaza
Client Organization: Anchorage Water and Wastewater Utility
SeaWolf Engineering 2015 has been contracted to design an upgraded headworks process at the ERWWTF that can handle current flow rates. The ERWWTF was constructed in 1971, and is owned and operated by the Anchorage Water and Wastewater Utility (AWWU). The facility is currently configured to be a conventional activated sludge process with tertiary granular media filtration and UV sanitation, where the treated effluent discharges into Eagle River. In 2013 and 2014 the headworks of the facility experienced overflows as a result of influent flows greater than the capacity of the system.
Because of this, AWWU requested an upgrade to the headworks portion of the facility with a 30 year outlook and a budget of $9 million SeaWolf Engineering 2015 designed a solution to enable the headworks to support the incoming flow rates of the service population for the next 30 years. With the limited ability of the current headworks configuration, the proper amounts of screening and grit material are not being removed from the wastewater and is causing unnecessary loads to the downstream processes.
Furthermore, the absence of any dewatering equipment requires the facility to transport their processed screenings and grit material to the King Street Dewatering Facility (20 miles away from facility) to be dewatered before being taken to the Anchorage Regional Landfill (2.2 miles away from the facility) for final disposal. Several options were considered, including one that does not require the construction of a new building. The final recommended option includes constructing a new building for the headworks equipment.