TY - GEN
T1 - Performance of an Anaerobic Fluidized Bed Bioreactor (AnFBR) for digestion of municipal biosolids and bioethanol wastes
AU - Andalib, Mehran
AU - Elbeshbishy, Elsayed
AU - Hafez, Hisham
AU - Mustafa, Nizar
AU - Nakhla, George
AU - Zhu, Jesse
N1 - Publisher Copyright:
Copyright © 2013 Water Environment Federation. All Rights Reserved.
PY - 2013
Y1 - 2013
N2 - The primary objective of this work was to investigate the treatability of very high suspended solids with different biodegradable particulate fractions, thin stillage (a by-product from the corn ethanol industry) as well as primary sludge, using an anaerobic fluidized bed bioreactor (AnFBR) employing zeolite with average diameter of (dm) of 425-610 μm and specific surface area (SSA) of 26.5 m2/g as the carrier media. Due to the long-term impact of accumulation of inert suspended solids in the AnFBR and potential toxicity leading to failure, treatability of high suspended-solid streams can be very challenging. Despite the very high strength of thin stillage and primary sludge with chemical oxygen demand of 130,000 mg TCOD/L and 42,000 mg TCOD/L respectively and suspended solids of 47,000 mg TSS/L and 34,000 mg TSS/L, the AnFBR showed up to 88% and 82% TCOD and 78% and 82% TSS removal efficiencies from thin stillage and primary sludge respectively at very high organic and solids loading rates (OLR and SLR) of 29 kg COD/m3.d and 9.5 kg COD/m3.d and 10.5 kg TSS/m3.d and 10.3 kg TSS/m3.d respectively at hydraulic retention time (HRT) of 3.5 and 4 days. Maximum methane production yields of up to 40 LCH4/LThin stillage and 9.7 LCH4/LPS were achieved for treating thin stillage and primary sludge respectively corresponding to biogas production rate per reactor volume of 15.8 Lgas/Lreactor.d and 1.22 L CH4/Lreactor.d.
AB - The primary objective of this work was to investigate the treatability of very high suspended solids with different biodegradable particulate fractions, thin stillage (a by-product from the corn ethanol industry) as well as primary sludge, using an anaerobic fluidized bed bioreactor (AnFBR) employing zeolite with average diameter of (dm) of 425-610 μm and specific surface area (SSA) of 26.5 m2/g as the carrier media. Due to the long-term impact of accumulation of inert suspended solids in the AnFBR and potential toxicity leading to failure, treatability of high suspended-solid streams can be very challenging. Despite the very high strength of thin stillage and primary sludge with chemical oxygen demand of 130,000 mg TCOD/L and 42,000 mg TCOD/L respectively and suspended solids of 47,000 mg TSS/L and 34,000 mg TSS/L, the AnFBR showed up to 88% and 82% TCOD and 78% and 82% TSS removal efficiencies from thin stillage and primary sludge respectively at very high organic and solids loading rates (OLR and SLR) of 29 kg COD/m3.d and 9.5 kg COD/m3.d and 10.5 kg TSS/m3.d and 10.3 kg TSS/m3.d respectively at hydraulic retention time (HRT) of 3.5 and 4 days. Maximum methane production yields of up to 40 LCH4/LThin stillage and 9.7 LCH4/LPS were achieved for treating thin stillage and primary sludge respectively corresponding to biogas production rate per reactor volume of 15.8 Lgas/Lreactor.d and 1.22 L CH4/Lreactor.d.
KW - Biosolids
KW - Fluidized bed bioreactor
KW - High rate anaerobic digester
KW - Primary sludge
KW - Thin stillage
UR - http://www.scopus.com/inward/record.url?scp=85070546278&partnerID=8YFLogxK
U2 - 10.2175/193864713813692342
DO - 10.2175/193864713813692342
M3 - Conference contribution
AN - SCOPUS:85070546278
T3 - 86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
SP - 5297
EP - 5318
BT - 86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
PB - Water Environment Federation
T2 - 86th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2013
Y2 - 5 October 2013 through 9 October 2013
ER -
