Welcome to the city's wastewater treatment plant!
Go through the stages of sewage treatment with the main character - Active Sludge!
Remove foreign objects at the mechanical cleaning level, convert Ammonium Nitrogen to Nitrite, and then to Nitrate at the aeration tank levels.
Go through the stages of sewage treatment with the main character - Active Sludge!
Remove foreign objects at the mechanical cleaning level, convert Ammonium Nitrogen to Nitrite, and then to Nitrate at the aeration tank levels.
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