BioChem - DOS

Biohydrogen production from food waste in batch and semi-continuous conditions: Evaluation of a two-phase approach with digestate recirculation for pH control

International journal of hydrogen energy

Chinellato, G.; Cavinato, C.; Bolzonella, D.; Heaven, S.; Banks, C.J.

The research investigated the production of Biohythane in a two-phase anaerobic digestion process treating food waste as substrate. Preliminary batch assays were carried out at initial organic loadings of 15, 20, 25 and 30 kg TVS m<SUP>-3</SUP>, in stirred 1.5-l reactors at 55 <SUP>o</SUP>C. The results showed all hydrogen was produced within the first 24 h after feeding and the highest load tested gave the maximum hydrogen production (0.047 m<SUP>3</SUP> H<SUB>2</SUB> kg<SUP>-1</SUP>VS, H<SUB>2</SUB> 30%). Similar loadings were then tested in a two-phase system. Hydraulic retention times of 3 and 12 days were applied to the first and second reactor respectively. In order to keep the pH at ~5.5, either supernatant or whole digestate from the methanogenic reactor was recirculated to the first phase. Results showed that hydrogen was produced (0.117 Nm<SUP>3</SUP> kg<SUP>-1</SUP> VS, 47.7%) when recirculating whole digestate with an organic loading rate of 20 kg TVS m<SUP>-3</SUP> day<SUP>-1</SUP>.

2013

Pergamon Press ; Elsevier Science Ltd

0360-3199

1879-3487

38

11

pp.4351-4360

10.1016/j.ijhydene.2013.01.078

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65678602

https://eprints.soton.ac.uk/350282/1/__soton.ac.uk_ude_PersonalFiles_Users_sh7_mydocuments_SHnow_Res_Papers_Cavinato_Chinellato%2520et%2520al%25202013%2520FW%2520H2%2520-%2520scholar%2520text.pdf

Biohydrogen; Biohythane; Two-phase; pH control; Anaerobic digestion