Paying for Themselves An Evaluation of Turbo Blower Life-Cycle Costs

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Abstract:

Many municipalities are identifying ways to reduce energy consumption at their wastewater treatment plants (WWTPs), to reduce operating costs and conserve resources. Aeration is typically the highest energy demand at WWTPs, consuming up to 60% of the overall power usage. Therefore, some municipalities have started replacing aging blowers with high-efficiency turbo blowers, resulting in substantial power savings. Two case studies in which turbo blowers were either temporarily or permanently installed at a WWTP are examined in this paper. Data collected during the studies were used to quantify the energy cost savings and calculate payback periods associated with installation of the turbo blowers. In the case studies, installation of the turbo blowers studies resulted in a 32% – 38% energy savings. Calculated payback periods for the two case studies were 6 years and 8 years for equipment costs only, and 12 years and 14 years for total installation costs.

Keywords: Aeration; blowers; energy efficiency; life-cycle costs; payback periods; turbo blowers

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864711802836454

Publication date: January 1, 2011

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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 These proceedings are not peer reviewed.

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