433653 Using Pulsed Electric Field Pre-treatment to Improve Methane Production

Thursday, November 12, 2015: 2:15 PM
250B (Salt Palace Convention Center)
Seyedeh Masoumeh Safavi, Civil and Environmental Engineering, University of Iceland, Reykjavik, Iceland and Rúnar Unnţórsson, University of Iceland, Reykjavik, Iceland

The efficiency of the anaerobic digestion (AD) process mostly depends on the bioavailability of the organic solids. Through specific pre-treatments of the substrate the AD process will convert the organic solids better and faster. Laboratory-scale batch AD tests were run to analyze the influence of pulsed electric fields on the methane production from pig slurry (PS), landfill leachate (LL) and fruit/vegetable waste (FVW). The results were compared with untreated samples (control). Methane production of the PS and LL compared to the control was significantly increased up to 50 and 48%, respectively, with the highest intensity (180 kJ/kg). The result of PEF pre-treatment on FVW showed that lowest intensity (54 kJ/kg) was the intensity by which the highest amount of methane (up to 13%) was achieved. Chemical oxygen demand removals were increased up to 45, 100 and 17% for PS, LL and FVW, respectively, compared to the control.

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