TY - JOUR
T1 - Biodegradation of potato slops from a rural distillery by thermophilic aerobic bacteria
AU - Cibis, E
AU - Kent, Christopher
AU - Krzywonos, M
AU - Garncarek, Z
AU - Garncarek, B
AU - Miskiewicz, T
PY - 2002/10/1
Y1 - 2002/10/1
N2 - A study has been made of thermophilic aerobic biodegradation of the liquid fraction of potato slops (distillation residue) from a rural distillery. The COD of this fraction ranged from 49 to 104 g O-2/l, the main contributions to the COD coming from organic acids, reducing substances, and glycerol. It was found that biodegradation could be divided into the following stages: organic acids were removed first, followed by reducing substances and glycerol. The extent of removal varied according to the process temperature. At 50 degreesC, acetic and malic acids were removed completely, but the amount of isobutyric acid increased. At 60 degreesC, organic acid removal ranged from 51.2% (isobutyric acid) to 99.6% (lactic acid). Removals of glycerol and reducing substances were 86.2% and 87.4%, respectively. COD reduction was also temperature dependent, the highest removal efficiency (76.7%) being achieved at 60 degreesC. Dissolved oxygen may have limited the biodegradation process, as indicated by the DOT-versus-time profile. (C) 2002 Elsevier Science Ltd. All rights reserved.
AB - A study has been made of thermophilic aerobic biodegradation of the liquid fraction of potato slops (distillation residue) from a rural distillery. The COD of this fraction ranged from 49 to 104 g O-2/l, the main contributions to the COD coming from organic acids, reducing substances, and glycerol. It was found that biodegradation could be divided into the following stages: organic acids were removed first, followed by reducing substances and glycerol. The extent of removal varied according to the process temperature. At 50 degreesC, acetic and malic acids were removed completely, but the amount of isobutyric acid increased. At 60 degreesC, organic acid removal ranged from 51.2% (isobutyric acid) to 99.6% (lactic acid). Removals of glycerol and reducing substances were 86.2% and 87.4%, respectively. COD reduction was also temperature dependent, the highest removal efficiency (76.7%) being achieved at 60 degreesC. Dissolved oxygen may have limited the biodegradation process, as indicated by the DOT-versus-time profile. (C) 2002 Elsevier Science Ltd. All rights reserved.
KW - stirred-tank reactor
KW - thermophilic bacteria
KW - potato slops
KW - aerobic process
UR - http://www.scopus.com/inward/record.url?scp=0036014884&partnerID=8YFLogxK
U2 - 10.1016/S0960-8524(02)00069-X
DO - 10.1016/S0960-8524(02)00069-X
M3 - Article
C2 - 12146644
VL - 85
SP - 57
EP - 61
JO - Bioresource Technology
JF - Bioresource Technology
IS - 1
ER -