During wastewater treatment, the secondary treatment requires continual aeration to
A) suppress microbial growth.
B) select for anaerobic heterotrophs.
C) stimulate abiotic degradation.
D) increase microaerophilic filamentous bacteria.
E) maximize breakdown of molecules to CO₂ and nitrates.

Question

Quizplus · Accepted Answer

The purpose of the secondary treatment in wastewater treatment is to remove dissolved organic matter and suspended solids. This process is done through biological treatment, which requires aeration to maximize the breakdown of molecules to CO₂ and nitrates by aerobic bacteria. This process helps to reduce the organic load and biological oxygen demand (BOD) of the effluent, making it cleaner for discharge into receiving bodies of water.

During Wastewater Treatment, the Secondary Treatment Requires Continual Aeration to