1. Hermitage Class A Biosolids Program

    When the Hermitage Municipal Authority wanted to obtain Class A status for its biosolids, it was not as simple as downloading and completing the necessary forms. As one of the first facilities in Pennsylvania to accept food waste in its digesters, the Authority needed to first receive conditional approval from the U.S. Environmental Protection Agency…

  2. City of York Biogas Piping Repair and Improvements

    The City of York operates a 26-mgd advanced wastewater treatment plant, providing service to the greater York region. As part of its sludge handling processes, the City employs anaerobic digestion and combusts the accumulated biogas to produce electricity to meet the facility’s needs. To ensure optimal performance of the biogas piping, the City hired RETTEW…

  3. Sharon Sanitary Authority Trickling Filter Study

    The Sharon Sanitary Authority experienced a collapse of the media and support systems in two trickling filter units at the wastewater treatment plant, triggering an emergency situation. The units were approximately ten years old, well under the intended design life of the media and media support systems. With an unexpected material failure, the Authority needed…

  4. City of York Primary Effluent Pumps Variable Frequency Drive Replacement

    The City of York needed to replace the effluent pump variable frequency drives (VFDs) at their wastewater treatment plant because they were old and obsolete with replacement parts for repairs scarce and becoming increasingly difficult to find. The City needed to continue critical operations while replacing the VFDs, presenting yet another challenge. RETTEW conducted a…

  5. University Area Joint Authority Transformer Replacement

    The University Area Joint Authority had an outdated transformer that required an emergency replacement. In an effort to avoid continuous generator failures, the client needed to safely replace outdated equipment with new equipment to prevent electrical outages and maintain operations. RETTEW took over the project from another consultant who was behind schedule and over budget….

  6. University Area Joint Authority Aeration and UV Control Upgrades

    The client’s outdated aeration system controls and UV system had a history of malfunctions and failure. Poor control strategies and lack of equipment understanding had created a situation where neither the University Area Joint Authority staff nor an outside contractor could control the system. The aeration system, helping to treat wastewater, is one of the…

  7. Hermitage Codigestion and Biogas Generation Optimization

    The Hermitage Municipal Authority wanted to optimize biogas production to help reduce their system’s energy consumption and use their renewable energy equipment to recycle the residual waste and ultimately lower energy costs. Biogas is created when biodegradable matter and bacteria ferment and can be converted into electricity. RETTEW’s anaerobic digestion experts were brought in to…

  8. Highspire Borough Authority Wastewater Treatment Plant Upgrades

    Pennsylvania Department of Environmental Protection required the Highspire Borough Authority to upgrade its wastewater treatment plant to meet biological nutrient removal requirements as part of Pennsylvania’s Chesapeake Bay Tributary Strategy. The retrofit project required a difficult and complex construction sequence and had to be completed while the plant remained fully operational and within a short…

  9. University Area Joint Authority Advanced Water Treatment Upgrades

    Looking to be at the forefront of advanced water treatment (AWT) and reuse in Pennsylvania, the University Area Joint Authority (UAJA) wanted to upgrade its disinfection process for its water reuse treatment system. In its current state, the disinfection process was nearing the end of its useful life and consistently incurred excessive operating costs. The…

  10. University Area Joint Authority Enhanced Nutrient Removal Study

    The University Area Joint Authority (UAJA) owns and operates a 10.5-mgd advanced wastewater treatment facility. This facility serves the greater State College area, known as the Centre Region, and outlying areas of The Pennsylvania State University. Complete with advanced biosolids composting and wastewater reclamation to drinking water (indirect potable reuse), UAJA operates one of the…

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Project Update

Pequea 6 (Ronks Road) Bridge Officially Opened

The County of Lancaster opened the Pequea 6 Bridge on Ronks Road in East Lampeter and Strasburg Townships….

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Project Update

Phase II of UAJA Solar Array Formally Completed

The University Area Joint Authority (UAJA), Solar Renewable Energy, LLC (SRE), and RETTEW held a ribbon-cutting ceremony on…

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