${?}^{\text{A}\text{c}\text{t}\text{i}\text{v}\text{a}\text{t}\text{e}\text{d}}$ s$/$udge systems $($Secondary Treatment$)$

$5\mathrm{.}2\mathrm{.}1\mathrm{.}2$ Secondary Clarifi$-$

After a desired aeration

${?}^{to}$ oxidize the can

mixedize

ratin lion.

exam version number on your answer sheet.

Which function in the ASP is provided by the

secondary clarifier?

Clarifies the secondary biological floc

Provides an aerobic environment for the

conversion of biodegradable organic matter

Maintains a minimum depth of sludge blan

Clarifies the secondary sludge

An activated sludge process facility with two aerati

tanks $($each $40$ feet long and $40$ feet wide$)$ and fout

secondary clarifiers $($each $90$ feet in diameter$)$ recei

an average flow rate of $20$ million gallons per dav