PMID- 22366228
OWN - NLM
STAT- MEDLINE
DCOM- 20120927
LR  - 20171116
IS  - 1873-2828 (Electronic)
IS  - 1350-4177 (Linking)
VI  - 19
IP  - 5
DP  - 2012 Sep
TI  - Impact of ultrasonic pretreatment under different operational conditions on the 
      mesophilic anaerobic digestion of sunflower oil cake in batch mode.
PG  - 1003-10
LID - 10.1016/j.ultsonch.2012.02.001 [doi]
AB  - In this study ultrasonic (US) pretreatment was investigated with the aim of 
      improving the anaerobic digestion of sunflower oil cake (SuOC), the solid waste 
      derived from the extraction process of sunflower oil. Five ultrasonic 
      pretreatment assays were conducted at specific energy (SE) and sonication times 
      in a range from 24,000 kJ/kg TS and 16.6 min (assay 1: US1) to 597,600 kJ/kg TS 
      and 331.2 min (assay 5: US5), respectively, all operating at a constant 
      sonication frequency (20 kHz) and ultrasonic power (120 W). As regards ultrasonic 
      pretreatment, the working conditions of the first assay (US1) using samples of 
      SuOC at 2% (w/v) showed to be the most appropriate in terms of both lignin and 
      hemicellulose degradation (57.7% and 66.7%, respectively) and cellulose increase 
      (54% increase with respect to its initial concentration). The percentage of COD 
      solubilization increased from only 14% to 21% when SE was 25 times higher. 
      Results obtained in batch anaerobic digestion experiments (biochemical methane 
      potential - BMP - tests) conducted at 35 degrees C of the solid and liquid fractions 
      released from the different ultrasonic conditions tested, indicated that for the 
      first experiment (US1) the average ultimate methane yield obtained was 53.8% 
      higher than that achieved for untreated SuOC. Finally, the kinetic constants of 
      the anaerobic digestion of the solid and liquid fractions released after the 
      ultrasonic pretreatment were virtually independent of the operation conditions 
      assayed.
CI  - Copyright (c) 2012 Elsevier B.V. All rights reserved.
FAU - Fernandez-Cegri, V
AU  - Fernandez-Cegri V
AD  - Instituto de la Grasa (CSIC), Sevilla, Spain.
FAU - de la Rubia, M A
AU  - de la Rubia MA
FAU - Raposo, F
AU  - Raposo F
FAU - Borja, R
AU  - Borja R
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120209
PL  - Netherlands
TA  - Ultrason Sonochem
JT  - Ultrasonics sonochemistry
JID - 9433356
RN  - 0 (Plant Oils)
RN  - 0 (Sunflower Oil)
SB  - IM
MH  - Anaerobiosis
MH  - Plant Oils/chemistry/*metabolism
MH  - Refuse Disposal/*methods
MH  - Sunflower Oil
MH  - *Ultrasonics
EDAT- 2012/03/01 06:00
MHDA- 2012/09/28 06:00
CRDT- 2012/02/28 06:00
PHST- 2011/12/16 00:00 [received]
PHST- 2012/01/26 00:00 [revised]
PHST- 2012/02/01 00:00 [accepted]
PHST- 2012/02/28 06:00 [entrez]
PHST- 2012/03/01 06:00 [pubmed]
PHST- 2012/09/28 06:00 [medline]
AID - S1350-4177(12)00018-1 [pii]
AID - 10.1016/j.ultsonch.2012.02.001 [doi]
PST - ppublish
SO  - Ultrason Sonochem. 2012 Sep;19(5):1003-10. doi: 10.1016/j.ultsonch.2012.02.001. 
      Epub 2012 Feb 9.