Like many parts of the country, the City of Fremont, Ohio, relied on an aging and increasingly ineffective wastewater treatment plant. The Division of Water Pollution Control chose construction-management-at-risk (CMAR) as the most expedient way to meet state EPA biological nutrient removal (BNR) requirements. The alternative delivery method saved almost $6 million on the plant’s $57 million renovation.
One reason the Division of Water Pollution Control chose construction-management-at-risk was to have more control over where funds were spent. Half the project’s $57 million budget went to companies based in the city. The CMAR contractor is constantly involved in the oversight of the subcontract companies, helping to manage costs and solve problems as they arise. Here, local contractors set centrate pump two in the Water Pollution Control Center.
Anaerobic, anoxic, oxic (A2O) is a three-stage active sludge process that removes nutrients biologically instead of chemically. This shows the A20 basin. Division managers chose A20 because they expect to have to meet tougher total phosphorous (TP) and total nitrogen (TN) requirements in the future. The renovated facility’s new liquids treatment technology has met state and federal regulatory requirements since completion in February 2016.
Ultraviolet (UV) disinfection system at the Water Pollution Control Center.