Cromaglass® BENEFITS

* Thoroughly tested * Easily Installed
* Modular Construction * Positive Discharge
* Easily Expanded * "Flow Thru" Eliminated
* Lightweight * Accepts Overload
* Noise & Odor Free * Automatic Controls
* Monitoring 24 Hours * Noncorrosive

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 without costly add-on equipment or the addition of hazardous chemical compounds.

Normal 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 needs 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 Clarifiers 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.

 



Adequate Overload Reserve

Batch Processing is capable of high treatment even under a wide range of flows as found in growing communities. Also with varying organic loadings of commercial, school and institutional use, excellent effluent standards are maintained. This feature is an integral part of the system to cover temporary emergencies or upsets.

Reduced Drain Field Size and Surface Discharge Capabilities

Because of the clear, odorless quality and high treatment standards of Cromaglass Systems, drain field size can be reduced substantially from that required for conventional systems. With optional disinfection added, these systems are permitted for surface discharge under conditions normally unsuitable for sub-surface disposal.

Noise and Odor Controlled

Attractive tank modules with locked maintenance hatchways enable Cromaglass Systems to be installed without odors or noise associated with other types of open sewage treatment plants, when operated properly. Tanks can be installed close to buildings being served - saving unneeded pipe and/or pump expense.

Proven Quality

Assurance of treatment quality has been accomplished through independent laboratory research and testing supported by sampling from installed systems (results available upon request). Standards for BOD5 and TSS as established by Caribbean Enviromental Health Institute have been surpassed. Effluent quality, with over 90-95% reduction of BOD and Suspended Solids, enables Cromaglass to be recommended where other methods are not acceptable. Recycled effluent is currently being used for landscape irrigation and also as a toilet flushing medium in many countries.

  Copyright ©2006 S.I.R Water Management Ltd.