With more than 70 years of experience, CROM understands the complex needs and requirements of wastewater treatment. Our unique design/build approach covers the entire scope of needs for wastewater infrastructure including equalization tanks, sludge digesters, process water tanks, effluent storage tanks, clarifiers, aeration tanks, sequencing batch reactor (SBR) tanks, bilge storage tanks, and package treatment tanks.
Prestressed Concrete Tank Applications
Circular Wastewater Process Tanks
Flow Equalization (EQ) Storage
Our prestressed Concrete Equalization (EQ) tanks are a preferred, cost-effective solution for containing large volumes of wastewater for flow equalization or wet weather storage.
EQ tanks are frequently designed to accommodate peak flow conditions and provide steady inflow to the treatment plant preventing combined sewer overflow (CSO) and sanitary sewer overflow (SSO) events.
Peak Flow Accommodation
CSO / SSO prevention
Reclaimed / Reuse Storage
CROM prestressed concrete tanks are cost-effective solutions for managing reclaimed or reuse wastewater. These tanks may be located at the treatment plant facility, on golf courses or agricultural land where the treated water is used for irrigation purposes.
In Florida, recycling water on site or nearby, reduces energy the needed to move water long distances or lift it from the aquifer. This water can also be used as make-up water for chillers in high-cooling environments such as data centers. These are cost effective solutions to the water treatment process.
Irrigation Reuse
Data Center Chiller Make-up Water
Clarifiers
CROM prestressed concrete tanks can be designed to accommodate various types of clarifier mechanisms. Operating on the principle of gravity settling, clarifiers have been used to treat wastewater for decades and provide efficient solutions to process and purify wastewater.
Gravity Settling Design
Compatible Various Types of Mechanisms
Digesters
CROM’s experience in design and construction of digesters includes many configurations and sizes, including open-top aerobic digesters and pressurized anaerobic digesters. Prestressed concrete tanks can be designed to accommodate the requirements and demands of sludge digestion and storage. Prestressing wires can be placed to accommodate multiple wall pipe penetrations.
Anaerobic digesters may be built with free-span prestressed concrete domes or designed to accommodate fixed or floating steel covers, aluminum domes, or membrane covers. Mesophilic (90 degrees Fahrenheit) and thermophilic (140 degrees Fahrenheit) processes are possible by applying insulation to the exterior of the tanks. CROM has also designed and built several unconventional structures.
Mesophilic – 90°F
Thermophilic – 140°F
Modified Egg-Shaped Digesters
A small diameter, high sidewall, steepy sloped floors, and cone-shaped domes are challenges met by CROM Modified Egg-shaped Digesters. This type of digester minimizes dead zones at the floor/wall and roof/wall intersections, reducing sludge build-up and the resulting down-time for cleaning and maintenance. The construction of these digesters has proven to be much more economical than traditional egg-shaped digesters.
Sequencing Batch Reactors (SBR)
Designed for efficient wastewater treatment across diverse applications, our on-staff Engineers can design AWWA D110 type II walls, as required, to provide mounting points for specialized equipment.
AWWA D110 Type II Walls
Secondary Containment
Secondary containment tanks are EPA-mandated engineering controls that prevent harmful discharges from reaching navigable waters, adjoining shorelines, groundwater and storm sewers. Our durable PCT tanks provide an essential line of defense in the case of primary containment failure.
EPA-mandated Controls
Secondary Protection Layer
Let’s Build Something for Life
For infrastructure that’s built to last, choose a partner that supports its entire life.
CROM, your lifecycle partner.