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. Joy Cone Adsorption Chiller Design

    RETTEW completed a cooling system upgrade analysis and conceptual design engineering for Joy Cone Company where we identified significant savings opportunities for the system design they needed. The design was to upgrade the cooling system that currently serves several process areas at their Hermitage, Pennsylvania, facility. Using data generated during our previous investigation, we obtained…

  6. Hermitage Air Quality Permit Consulting

    The Pennsylvania Department of Environmental Protection (PA DEP) issued the Hermitage Municipal Authority (HMA) an air quality plan approval permit for the installation and operation of the Authority’s combined heat and power (CHP) unit, startup boiler, and emergency generator. Subsequently, regular stack emissions testing and data records of daily operations were required to ensure air…

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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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