Fill:
Aeration
Flow enters the solids Retention Section (A) which is separated
by non-corrosive screen. Inorganic solids are retained behind
the screen. Organic solids are broken by turbulence created
with mixed liquor being forced through screen by submersible
aeration pumps. This eliminates the need for mechanical comminution. |
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Aeration
Liquid and small organic solids pass through the screen into
the continuing Aeration section (B). Air and mixing are provided
by submersible pumps with venturi aspirators that receive air
through pipe intake pipe from the atmosphere. |
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Denitrification
(Optional)
Provided by an anoxic period during the regular treatment cycle.
These units create anoxic conditions by closing the air
intakes of the aeration pumps with electric valves. This stops
aeration, but the system continues mixing. |
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Transfer/Settle
Treated mixed liquor is transferred by pumping to the Clarification
Section (C). The transfer period overfills the Clarifier with
the excess spilling through overflow weirs back into the main
Aeration Section. Transfer ceases and Clarifier (C) is isolated
- solids separation occurs under quiescent conditions. |
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Discharge
After settling, effluent is pumped out of the Clarifier (C)
for discharge. Sludge is returned from the bottom of the Clarifier
(C) back into the main Aeration Section (B) using a submersible
pump, or sludge can be wasted to a Sludge Processing Tank. |
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