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Bio-Energy Technology Advances that Promote Wastewater Utility Energy Independence

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Energy management concepts that include bio-energy and energy recovery from wastewater digestion as a source of renewable energy promotes sustainability and is an important first step towards energy independence for wastewater utilities. Energy independence can be achieved through energy conservation, creating more efficient systems, and development of renewable energy including bio-energy production, solar, geothermal and wind power1. Therefore a movement toward maximizing utilization of biologically derived energy coupled with other renewable energy sources has recently become of more interest to wastewater facility management. Energy recovery from innovative and recent technical advances in digestion and bio-solids provides an opportunity for wastewater utilities to invest in energy management strategies to optimize the recovery of energy from various digestion processes, thermal drying and solids reduction and stabilization strategies to reduce the cost of treatment. This paper proposes a benchmark of 7.0 Kw-h/month/Kg TSS (15.4 Kwh/ month/lb TSS) for maximum electrical production efficiency for biogas fueled facilities. Those facilities that use biogas as a fuel source and approach the upper end of this energy efficiency benchmark should be close to neutral electricity consumption.

Keywords: anaerobic digestion; bio-energy; biogas; carbon credit; electrical energy efficiency; energy content; renewable energy

Document Type: Research Article


Publication date: 2010-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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