Chinook Wastewater Treatment Plant's "good example" goes international
April 7, 2021
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 af...