Wastewater Treatment Systems
DESIGNED as a continuously fed activated sludge process with clarifiers that are operated on a batch basis.
All Cromaglass treatment systems operate on identical principles: Turbulent aeration of incoming wastes and batch treatment of bio-mass in separate aeration and quiescent settling chamber.
DISCHARGED effluent is an odorless liquid, almost clear in color, with a reduction in BOD and Suspended Solids over 90%. Even higher efficiencies can be achieved if required.
DENITRIFICATION -is now mandated in many areas and Cromaglass Systems are capable of Denitrification with the addition of an anoxic cycle following aeration.
Per-batch cycling is 120-240 minutes. Optimum quality standards are maintained even at peak intake levels because of batch-transfer and batch-reserve functions.
Proven effluent quality is attested to by independent laboratory research and testing. National standards such as established by the National Sanitation Foundation and Federal EPA have been surpassed. Effluent quality is accepted for RECYCLE use with irrigation and toilet flushing.

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.

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 from the atmosphere.

DENITRIFICATION (OPTIONAL)
Provided by an anoxic period during the regular treatment cycle. Cromaglass units create anoxic conditions by closing the air intakes of the aeration pumps with electric valves. This stops aeration, but the system continues mixing.

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.

DISCHARGE
After settling, effluent is pumped out of the Clarifier (C) for discharge. Return sludge is 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.

Cromaglass^® BENEFITS