1. Bluesphere Anaerobic Digester Due Diligence

    A private developer of renewable energy projects hired RETTEW to conduct a due diligence evaluation of a 400-ton-per-day food waste anaerobic digestion facility in Charlotte, North Carolina. The facility receives organic feedstocks from poultry and other food processing operations, pre- and post-consumer food waste from grocery chains, and manure from local farms. The feedstocks are…

  2. Brewing Company Anaerobic Pretreatment System Evaluation

    The Sierra Nevada Brewing Company opened a 500,000-barrel-per-year facility, which includes an on-site industrial wastewater pretreatment plant. The pretreatment technology comprises an anaerobic sequencing batch reactor (ASBR) to remove solids and organics prior to discharge to the local sewer. Since the predominant livestock in the region is swine, it is not cost-effective to sell the…

  3. Anaerobic Digestion to Renewable Natural Gas Project Development

    An energy client was looking to develop multiple renewable natural gas (RNG) projects to meet their corporate sustainability goal of reducing the carbon footprint of the natural gas grid through RNG. These projects will generate biogas that can be upgraded to RNG on site. The feedstocks for this program are agricultural wastes such as dairy…

  4. Township of Delhi Anaerobic Digester Evaluation

    The Township of Delhi operates a conventional wastewater treatment plant designed to treat 4 to 5 mgd. The facility currently treats an average of 2.5 mgd of wastewater. Waste solids generated in the plant are combined with third-party organic wastes in a co-digestion process. The resultant biogas is used to heat the digesters and generate…

  5. Highspire Borough Authority Biosolids Upgrade

    The Highspire Borough Authority’s wastewater treatment plant is designed to treat up to 2 mgd of wastewater. The current treatment process includes primary screening and grit removal, grinding or commutation, biological treatment for biochemical oxygen demand and nutrient removal, secondary clarification, anaerobic sludge digestion with biogas flared, centrifuge dewatering, and disinfection using UV light. The…

  6. Highspire Borough Authority Capital Improvement Plan

    The Highspire Borough Authority retained RETTEW to prepare a capital improvement plan to assist in planning for the future needs of their operations. The plan called for reviewing the existing wastewater facilities, including the wastewater treatment plant and sanitary collection and conveyance systems, with the goal of anticipating necessary system repairs and replacements. In addition…

  7. Hermitage Annual Report

    As part of their overall strategy to optimize operations, maintenance, and finances, and to fulfill requirements of a bond indenture, the Hermitage Municipal Authority retained RETTEW to prepare an annual report of the Authority’s operating system. The report summarizes the operations, expenditures, and facility capacities, and predicts future system requirements. Yearly updates to the report…

  8. 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…

  9. Pennsylvania Turnpike Commission Wastewater and Environmental Engineering Services

    The Pennsylvania Turnpike Commission was looking for environmental engineering services for its facilities statewide, including 62 interchanges, 21 maintenance facilities, 17 service plazas, 8 police stations, 5 tunnels, and multiple administrative and operation buildings. RETTEW’s staff experience in wastewater and environmental engineering, along with our strategic office locations to provide on-site services, led to selection…

  10. National Beef Multivac Machine Safety Modifications

    A meat packaging facility wanted to modify their multivac sealing and packing machinery to allow for safe lock-out/tag-out (LO/TO) of any moving pieces of equipment while keeping the control system active during maintenance operations. RETTEW had previously been hired by the client to conduct safety training for its employees. Because of our safety expertise, as…

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Community Support

RETTEW Charitable Foundation Awards Grant to Good Karma Garage

RETTEW is excited to announce Good Karma Garage is the recipient of a $7,000 grant from the RETTEW…

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Services

Evolving With Our Clients and Technology

For the last decade, RETTEW has been providing North America’s largest flat-rolled steel producer with visual structural inspections…

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