Electrohydrolysis of Vinegar Fermentation Wastewater for Hydrogen Gas Production Using Different Types of Electrodes
JOURNAL OF ENVIRONMENTAL ENGINEERING, vol.139, no.6, pp.881-886, 2013 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 139 Issue: 6
- Publication Date: 2013
- Doi Number: 10.1061/(asce)ee.1943-7870.0000688
- Journal Name: JOURNAL OF ENVIRONMENTAL ENGINEERING
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.881-886
- Keywords: COD removal, Electrohydrolysis, Electrode type, Hydrogen gas, Vinegar fermentation
- Dokuz Eylül University Affiliated: Yes
Abstract
Vinegar fermentation wastewater with an initial chemical oxygen demand (COD) content of 33.16 g . L-1 was subjected to electrohydrolysis using aluminium, copper, and stainless-steel electrodes for hydrogen gas production. The applied DC voltage was constant at 4 V. The highest cumulative hydrogen production (2,098 ml), hydrogen yield (1,210 ml H-2 g(-1) COD), hydrogen formation rate (525 ml . d(-1)), percent hydrogen (99.5%) in the gas phase, percent COD removal (12%), and energy efficiency (21.3%) was obtained with the aluminium electrode. Hydrogen gas production by water electrolysis was 260 ml with the Al electrode, and wastewater control resulted in nearly 23 ml H-2 in 96 h. Hydrogen gas was produced by reaction of (H+) ions released from acetic acid and electrons provided by DC current. Aluminium electrode was the most suitable one among the others tested. (C) 2013 American Society of Civil Engineers.