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Ultrasonic and thermal pretreatment of apple pomace to improve biochemical methane potential
Author(s) -
Tulun Şevket,
Bilgin Melayib
Publication year - 2017
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12836
Subject(s) - pomace , mesophile , anaerobic digestion , ultrasonic sensor , methane , repeatability , chemistry , pulp and paper industry , chromatography , food science , biology , organic chemistry , medicine , genetics , radiology , bacteria , engineering
This study evaluates the effects of ultrasonic and thermal pretreatment on apple pomace solubilization and on the performance of the subsequent mesophilic anaerobic digestion. Ultrasonic frequency (35 and 53 kHz) and thermal methods are studied for pretreatment strategies. For each pretreatment method, four different temperatures are selected such as 25, 40, 50, and 60°C, and operation times are selected as 5, 15, 30, and 45 minutes. The highest increase in organic solubilization was observed at 60°C with 53 kHz in the 45 minutes. The highest biochemical methane productivity was achieved by the 53 kHz ultrasonic pretreatment at the 45 min. In addition to this, the solution with 1481.4 mL CH 4 /g‐VS was 1.74 times higher than the nonpretreatment condition 852.8 mL CH 4 /g‐VS. The pretreatment tests showed that the increasing biochemical methane potential could be obtained by using the apple pomace. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1601–1605, 2018