TY - JOUR
T1 - Semi-continuous production of volatile fatty acids from citrus waste using membrane bioreactors
AU - Lukitawesa,
AU - Eryildiz, Bahriye
AU - Mahboubi, Amir
AU - Millati, Ria
AU - Taherzadeh, Mohammad J.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1
Y1 - 2021/1
N2 - In the production of volatile fatty acids (VFAs) from citrus waste, organic loadings rates (OLR) from 1 to 8 g VS/L·d were applied in semi-continuous anaerobic fermentation using a tubular membrane bioreactor (MBR). Filtration fluxes of the membrane were in the range of 7.9–8.5 L/m2·h. trans-Membrane pressure (TMP) revolved around 24.1–67.5 mbar. No obvious fouling and clogging occurred. The highest yield of VFAs 0.67 g VFA/g VS (volatile solids) was achieved at OLR 4 g VS/L·d. When citrus waste was pretreated to remove D-limonene using an airlift reactor, the highest yield of VFAs 0.84 g VFA/g VS was also obtained at OLR 4 g VS/L·d. A further increase in OLR of up to 8 g VS/L·d caused a sharp decrease in yield for the untreated citrus waste and only marginal changes were observed for the pretreated citrus waste. The main composition of VFAs was acetate, butyrate, caproate, and propionate.
AB - In the production of volatile fatty acids (VFAs) from citrus waste, organic loadings rates (OLR) from 1 to 8 g VS/L·d were applied in semi-continuous anaerobic fermentation using a tubular membrane bioreactor (MBR). Filtration fluxes of the membrane were in the range of 7.9–8.5 L/m2·h. trans-Membrane pressure (TMP) revolved around 24.1–67.5 mbar. No obvious fouling and clogging occurred. The highest yield of VFAs 0.67 g VFA/g VS (volatile solids) was achieved at OLR 4 g VS/L·d. When citrus waste was pretreated to remove D-limonene using an airlift reactor, the highest yield of VFAs 0.84 g VFA/g VS was also obtained at OLR 4 g VS/L·d. A further increase in OLR of up to 8 g VS/L·d caused a sharp decrease in yield for the untreated citrus waste and only marginal changes were observed for the pretreated citrus waste. The main composition of VFAs was acetate, butyrate, caproate, and propionate.
KW - Anaerobic fermentation
KW - Citrus waste
KW - Membrane bioreactor
KW - Semi-continuous
KW - Volatile fatty acids, D-limonene
UR - http://www.scopus.com/inward/record.url?scp=85095980246&partnerID=8YFLogxK
U2 - 10.1016/j.ifset.2020.102545
DO - 10.1016/j.ifset.2020.102545
M3 - Article
AN - SCOPUS:85095980246
SN - 1466-8564
VL - 67
JO - Innovative Food Science and Emerging Technologies
JF - Innovative Food Science and Emerging Technologies
M1 - 102545
ER -