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Renewable Energy Technologies and Consulting Services

Faced with stricter clean-air regulations, rising energy costs, and sustainability demands, water resource recovery facilities (WRRFs) across North America are seeking practical solutions to reduce fossil fuel reliance, lower costs, and utilize biogas in climate-friendly, profitable ways. Carollo Engineers provides specialized business consulting in cogeneration systems, power plants, and energy usage management, specifically tailored to the water and wastewater industries. Our expertise helps WRRFs to optimize energy generation, minimize carbon footprints, and achieve significant cost savings.

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Some of our renewable energy projects include:
  • Co-digestion strategies to maximize biogas generation.
  • Cogeneration systems that efficiently produce electricity and heat from biogas.
  • Renewable natural gas (RNG) systems and natural gas injection for energy recovery.
  • Nutrient removal and recovery to reclaim valuable resources.
South Platte Renew project

Carollo Engineers stands at the forefront of on-site energy-generation solutions tailored for the water and wastewater industries. Our experience shows how robust pre-processing, enhanced digestion, and high-efficiency power production using biogas produced in anaerobic digesters can allow wastewater utilities to proactively become energy-neutral while reducing their carbon footprint and cost of service.

In particular, we specialize in planning, designing, and implementing the following innovations:

  • Co-digestion to increase biogas generation.
  • Biogas cogeneration and standby power systems.
  • Facilities using internal combustion engines, turbines, and micro-turbines.
  • Natural gas injection and renewable natural gas (RNG) fueling systems.
  • Power-generation systems using fuel cells.
  • Micro-hydro facilities.

And energy isn’t the only valuable product to be recovered from residuals. Carollo Engineers now works with pioneering technologies designed to extract precious minerals such as nitrogen and phosphorus from biosolids waste streams. Recovering and returning these resources to the environment as fertilizer not only extends our limited global phosphorus supply but also supports local agricultural needs.

With our committed support, WRRFs can make good use of their treatment byproducts to operate and power their facilities in a more environmentally conscious, cost-effective, and sustainable way.

Related Projects

Crops in a row on a farm
Headshot Tom Mossinger
As an industry, we’re in a unique position to help tip the scales of climate change while helping our communities be more sustainable and produce cleaner air. This is what makes our work so rewarding: The ability to not only help save operating costs but also make where we all live a better place.
Tom Mossinger, P.E., Chief Mechanical Engineer
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