Question

impurities removed?
Bar Screen
Bar screen
A mechanical filter is used
to remove visible objects
Rags, cans, plastic bottle
and napkins
2 Grit tank
Grit Tank
Long and narrow tanks slow down
the speed of the wastewater to
allow materials to settle down.
Sand, grit, and pebbles
Settling Tank
3 Settling tank
A tank which is sloped towards
middle. The heavy materials se
down, forming a sludge. This
removed by a scraper. The lig
materials float on top and are rem
by a skimmer.
The water removed from the se
tank is now called clarified water.
Heavy solids: Faeces
Light solids: Oil and grease
Aeration Tank
o co
4 Aeration tank
Air is pumped into the
clarified water. Aerobic
bacteria grow and
ecompose materials in
ne presence of oxygen.
ter several hours, the
purities settle, forming
activated sludge.
ep. food waste, and
nan waste
Chemical treatment
tank
Manure
UV
The activated si
from the aerati
tank can be dri
and used as m
After removal
activated slud​

Answer 1

Answer:

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Answer 2

Explanation:

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