Effect of heating strategy on power consumption and performance of a pilot plant anaerobic digester

Applied Biochemistry and Biotechnology
Teodoro Espinosa-SolaresMichael Easter

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 degrees C, 0.6 degrees C, and 1.0 degree C) for triggering the temperature control system from target temperature (56.7 degrees 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 degree C was compared to the one of 0.2 degrees C.

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Citations

Dec 2, 2010·Bioprocess and Biosystems Engineering·Salvador Valle-GuadarramaMax Domaschko
Aug 31, 2013·Applied Microbiology and Biotechnology·Ami M SmithDavid H Huber
Apr 10, 2013·Bioresource Technology·Deepak SharmaDavid H Huber
Aug 30, 2017·Environmental Science and Pollution Research International·Jiawei LiuXu Qian

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