Wastewater Treatment Plant Digesters

The energy hidden in wastewater is an untapped resource with the potential to offset 12% of the US electric demand. That’s thousands of POWER PLANTS  are ready to be turned on.  


The country’s aging wastewater treatment infrastructure system is facing capital, technical and regulatory challenges. Facilities are progressively required to improve pollutant loading reductions mandated by the Clean Water Act. The US EPA estimates investment needs for aging secondary and advanced wastewater treatment infrastructure totals $105.3 billion over the next twenty years.


Upgrading to high solids wastewater treatment plant digesters is an effective way to address these infrastructure improvements without passing the costs on to ratepayers. Biosolids are pumped into our stirred tank reactors, where they can also be co-digested with outside organic waste. As anaerobic bacteria break down the volatile solids in the digester, biogas is released and can be combusted to generate electricity. This electricity can be net metered onsite, with the potential for the wastewater treatment plant to become a net-zero facility.  Alternately, quasar’s plants can recognize revenue through the production and sale of renewable natural gas.


Working with quasar


quasar’s Project Development Team works with our clients to evaluate their treatment plant’s configuration and develop a technology solution to meet their specific needs.  We have collaborated with municipalities and engineering firms to build both greenfield plants and to retrofit existing assets, as well as to contribute to feasibility studies and biosolids management plans. With more than 100 years of combined experience in biosolids management, our team is prepared to collaborate. Find out more about our design-build services here.


Want to Learn More? Contact us
Ohio, Pennsylvania and New York:


Renato Contipelli

Phone: (216) 210-2307

Email: rcontipelli@quasareg.com 


All other states and Canada                                         


Alan Johnson

Phone: (216) 986-9999 x 117

Email: ajohnson@quasareg.com



     – New revenue streams (energy & tipping fees)

     – Reduce operating expenses



     – Increase plant throughput

     – Volatile solids reduction >70%

     – Class A options available



     – Achieve permit compliance



     – Offset up to 100% electricity use

     – Become net energy generators



    – Greenhouse gas reduction

    – Nutrient management


Additional Resources

The Water Resources Utility of the Future



Water Environment Federation (WEF)

Water Environment & Reuse Federation (WERF)

National Association of Clean Water Agencies (NACWA)


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