EE&T has designed new wastewater treatment facilities and engineered modifications to existing facilities. In addition to providing over ten years of day-to-day operational assistance to one municipal facility, EE&T personnel have completed study, design, and construction services for:
- Trickling filters
- Aerated lagoons
- Oxidation ditches
- Rotating biological contactors
- Sequencing batch reactors
- Phosphorus removal facilities
- Chlorine contact tanks
- Sand filters (including air/water backwash system)
- Wetlands treatment
- Digester maintenance
- Drying beds
- Odor control and disinfection equipment
- Emergency power
EE&T has evaluated various options of pumping and transporting wastewater and treatment plant sludge including centrifugal pumps, progressive cavity pumps, piston pumps, and belt conveyors.
Wastewater Collection -EE&T personnel have engineered various collection technologies from conventional gravity sewers and force mains, to the more complex vacuum sewers and small diameter effluent systems. In addition to new sanitary sewers in residential communities, EE&T designed sanitary sewers for heavy industrial areas that included innovative design requirements such as the use of micro-silica concrete and corrosion resistant gaskets.
Our personnel have extensive experience in the analysis, design, construction, and rehabilitation of wastewater collection piping systems. EE&T has provided engineering services for municipal and industrial systems, including conduits with overall capacities exceeding 200 mgd. In addition to design in urban areas, our projects have included lake, creek, and river crossings, and ocean outfall installations.
EE&T has completed numerous pipeline projects requiring the coordination between multiple municipalities. In addition to the design and construction of the sewer system itself, EE&T engineers have developed intermunicipal agreements for wastewater pipelines from two to seven entities, identifying responsibilities for funding, design, construction, and maintenance of the system. EE&T had an instrumental role in obtaining approval for a sanitary sewer replacement project for which the Department of Transportation originally prohibited excavation in the paved area. After exhaustive negotiations with regional, state, and local agencies, EE&T negotiated a compromise that allowed the project to be constructed with minimal pavement demolition and replacement.