We've Got The County Covered
In 2014 the US Environmental Protection Agency asked the staff at the Chinook Wastewater Treatment Plant (WWTP) if they would help the regulatory agency develop a case study to be shared with other older wastewater treatment plants. What interested the US Agency was how the staff in Chinook was able to remove nitrogen from wastewater using a 1984-era plant built solely to remove solids and maintain a certain oxygen content.
At the time the plant first opened there were few issues about leaving nutrients in discharged water after treatment. The concerns and regulations came several years after...