Wastewater Treatment Systems

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AUC offers a range of plants, with capacities from 100,000 to 2,000,000 GPD

With more than 50 years of experience in the wastewater treatment industry, AUC group has installed more than 2,000 plants across the country. AUC offers customers a one-stop solution that includes the design, manufacture, and installation of high-quality, cost-effective turnkey wastewater treatment systems. A range of lease and lease-to-purchase options are available under our Lease Plant Program.

AUC plants include package plants with capacities of 10,000 to 1,000,000 GPD, and concentric circle plants with capacities of 100,000 to 2,000,000 GPD.

Package Wastewater Treatment Systems

AUC’s package wastewater treatment systems are well-suited for decentralized wastewater treatment in remote areas. The modular and scalable design of package plants allows customers to start off small and add additional capacity as needed. The plants can also be moved to an alternative location at a later stage or removed completely if no longer needed.

All of our package wastewater treatment plants are designed for permanence; however, they can also be disassembled and removed or relocated if the needs of the development change. AUC package plants:

Can be customized according to any specifications
Can be easily scaled up should capacity needs increase
Are easy to operate and maintain
Are fitted with hot dipped galvanized handrails, walkways, air headers and drop pipes for a lifespan of 20-plus years
Are treated with a high-build epoxy coating system that can provide 12 to 15 years of corrosion protection

Decentralized Wastewater Systems

AUC designs decentralized wastewater treatment systems (stand-alone, scaled plants at the point of need) for municipal, commercial, and planned community applications. These systems operate on-site, providing independence from distant plants and avoiding the need for long, expensive pipe runs. Decentralized systems give customers the greater flexibility, resilience, and control they need.

AUC custom-engineers each wastewater treatment plant to influent parameters, effluent requirements, site constraints, and long-term growth plans. The AUC fleet of modular treatment units allows capacity to be deployed incrementally, supporting phased development and future expansion without disrupting service.

Mobile and Temporary Wastewater Solutions

Our mobile and temporary wastewater solutions provide efficient delivery of treatment capacity to solve water crises, serve as bypass plants during repairs or upgrades to existing plants, or provide capacity while a permanent plant is under construction.

In tandem with AUC’s timeline-based leasing options, quick-deploy modular systems become a powerful tool to optimize capital with no upfront investment required. They can be shipped in and installed quickly, serve only as long as needed, and be uninstalled with no fuss.

While steel construction modular systems are known for decisive advantages over traditional plants when deployed temporarily, they are also long-lasting. A customer satisfied with a temporary system can simply keep it in place as a permanent solution with virtually no trade-offs.

Concentric Circle Wastewater Treatment Systems

While any of our wastewater treatment plants can be a permanent solution, traditional concentric circle plants offer smaller footprints, higher flow rates, and lower costs.

Concentric circle plants have a central clarifier encircled by a ring of sludge bed chambers, incorporating both elements in a single multi-purpose structure. This space-saving configuration shrinks the plant’s footprint significantly for sites where every square foot matters. Where the flexibility of a packaged plant is not required, permanent concentric circle plants offer a familiar alternative with attractive advantages.

Concentric Circle Wastewater Treatment System

Concentric Circle Wastewater Treatment Plant

Traditional Concentric Circle Treatment Plant

Larger Clarifier Systems and Plant Consolidation

Customers often start with package wastewater treatment plants and expand in phases as the need for capacity grows. Over time, as smaller treatment units are added, space may be inadequate. In these cases, AUC supports plant consolidation by replacing several smaller clarifiers with a single larger one, simplifying operations and reclaiming usable site area.

AUC clarifiers over 57 feet in diameter are now operational in the field, and we fabricate key clarifier internals in-house, cutting the time from order submission to delivery to as little as 12 weeks, much shorter than usual lead times in the industry.

Trusted Wastewater Treatment Technologies

Our design philosophy is to keep treatment plants as simple to own and operate as possible. With that in mind, plants must also reliably meet effluent criteria as outlined by local environmental authorities.

For the majority of our installations, we start with a conventional activated sludge plant. This is a robust design that can handle normal variations in flow and loadings.

AUC Group also has plants that incorporate:

Biological nutrient removal (BNR)
Membrane bioreactors (MBR)
Sequencing batch reactors (SBR)
Moving bed biofilm reactor (MBBR)
Integrated fixed film activated sludge (IFAS)
Chemical phosphorus removal
Tertiary treatment

These technologies are ideal for more stringent nutrient removal or for sites with footprint constraints. In addition, reuse options and drip irrigation discharge can be added.

Add-Ons for Wastewater Treatment Systems

AUC also offers options to supplement standard plants, including:

Fine screens
Grit removal systems
Coarse and fine bubble diffusers
Equalization and reuse tanks
UV disinfection
Disc filters
Coagulant chemical feed systems
SCADA systems
Remote monitoring options
Blower sound enclosures
Odor control.

Looking for Municipal Wastewater Treatment Solutions?

Our team of wastewater experts can design a cost-effective and reliable municipal wastewater treatment solution that meets your current and future capacity needs.

Learn more about our municipal wastewater treatment and leasing options.

Lease Plant Program

AUC offers a flexible Lease Plant Program that allows customers to finance their wastewater treatment system with a short- or long-term lease, or a lease with the option to purchase, which minimizes initial cash outlay. Typical options include 5- and 10-year plant leases, which can be custom-tailored to specific project requirements.

No matter the location, capacity, or effluent requirements, AUC Group has the team and equipment to meet the need in the most cost-effective, reliable way. Request a quote for your project by contacting our engineers.

Wastewater Treatment FAQ

Does AUC design both small and large wastewater treatment systems?

Yes. AUC designs wastewater treatment systems ranging from small package plants to larger clarifier-based facilities for higher-flow applications.

How do decentralized wastewater systems differ from centralized plants?

Decentralized systems allow capacity to be deployed closer to demand, supporting phased growth, faster project delivery, shorter pipe runs, and independence from regional utilities. Centralized plants rely on extensive sewer networks and long development timelines.