What would happen if oxygen availability to activated sludge flocs ...

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What would happen if oxygen availability to activated sludge flocs is reduced?
\( \mathrm{P} \)
a. It will slow down the rate of degradation of organic matter
b. The center of flocs will become anoxic, which would cause death
W of bacteria and eventually breakage of flocs.
c. Flocs would increase in size as anaerobic bacteria would grow around flocs.
d. Protozoa would grow in large numbers.
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