Effects of ultrasound pre-treatment on the amount of dissolved organic matter extracted from food waste.

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 Technol

journal_title

Bioresource technology

authors

Jiang J,Gong C,Wang J,Tian S,Zhang Y

doi

10.1016/j.biortech.2013.12.064

subject

Has Abstract

pub_date

2014-03-01 00:00:00

pages

266-71

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(13)01904-4

journal_volume

155

pub_type

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