Abstract:
:This paper describes a series of studies on the effects of food waste disintegration using an ultrasonic generator and the production of volatile fatty acids (VFAs) by anaerobic hydrolysis. The results suggest that ultrasound treatment can significantly increase COD [chemical oxygen demand], proteins and reducing sugars, but decrease that of lipids in food waste supernatant. Ultrasound pre-treatment boosted the production of VFAs dramatically during the fermentation of food waste. At an ultrasonic energy density of 480W/L, we treated two kinds of food waste (total solids (TS): 40 and 100g/L, respectively) with ultrasound for 15min. The amount of COD dissolved from the waste increased by 1.6-1.7-fold, proteins increased by 3.8-4.3-fold, and reducing sugars increased by 4.4-3.6-fold, whereas the lipid content decreased from 2 to 0.1g/L. Additionally, a higher VFA yield was observed following ultrasonic pre-treatment.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Jiang J,Gong C,Wang J,Tian S,Zhang Ydoi
10.1016/j.biortech.2013.12.064subject
Has Abstractpub_date
2014-03-01 00:00:00pages
266-71eissn
0960-8524issn
1873-2976pii
S0960-8524(13)01904-4journal_volume
155pub_type
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