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Effect of Heating Strategy on Power Consumption and Performance of a Pilot Plant Anaerobic Digester

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Abstract

The effect of heating strategy on power consumption and performance of a pilot plant anaerobic digester treating chicken litter, under thermophilic conditions, has been studied. Heating strategy was evaluated using three different spans (0.2 °C, 0.6 °C, and 1.0 °C) for triggering the temperature control system from target temperature (56.7 °C). The hydraulic retention time in the pilot plant digester was in the range of 32 to 37 days, varying the total solids concentration fed from 5% to 6%. The results showed that under the experimental conditions, heating was the most energy-demanding process with 95.5% of the energy used. Increments up to 7.5% and 3.8%, respectively, on mechanical and heating power consumption, were observed as the span, for triggering the temperature control system from target temperature, was increased. Under the experimental conditions studied here, an increment of 30.6% on the global biodigester performance index was observed when a span of 1.0 °C was compared to the one of 0.2 °C.

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Acknowledgments

The authors wish to acknowledge the financial support received from West Virginia State University, Gus R. Douglass Institute’s Agricultural and Environmental Research Station; Consejo Nacional de Ciencia y Technología de México, and the Universidad Autónoma Chapingo, Departamento de Ingeniería Agroindustrial, Mexico. We would also like to acknowledge the following individuals for their contributions: Dr. Mark Chatfield and Scot Shapero.

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Authors and Affiliations

  1. Departamento de Ingeniería Agroindustrial, Universidad Autónoma Chapingo, Apartado Postal 161, Chapingo, 56230, Estado de México, México

    Teodoro Espinosa-Solares & Salvador Valle-Guadarrama

  2. Gus R. Douglass Institute, West Virginia State University, Institute, WV, 25112-1000, USA

    Teodoro Espinosa-Solares, John Bombardiere, Max Domaschko & Michael Easter

  3. Enviro Control Ltd., Singleton Court Business Park, Wonastow Road, Monmouth, UK

    John Bombardiere

Authors
  1. Teodoro Espinosa-Solares
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  2. Salvador Valle-Guadarrama
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  3. John Bombardiere
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  4. Max Domaschko
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  5. Michael Easter
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Correspondence to Teodoro Espinosa-Solares.

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Espinosa-Solares, T., Valle-Guadarrama, S., Bombardiere, J. et al. Effect of Heating Strategy on Power Consumption and Performance of a Pilot Plant Anaerobic Digester. Appl Biochem Biotechnol 156, 35–44 (2009). https://doi.org/10.1007/s12010-008-8487-6

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  • DOI: https://doi.org/10.1007/s12010-008-8487-6

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