Journal
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume 34, Issue 2, Pages 153-162Publisher
SPRINGER
DOI: 10.1007/s00449-010-0456-0
Keywords
Municipal wastewater; Up-flow anaerobic sludge blanket; Start-up stage; Low temperature; Stover-Kincannon
Funding
- Scientific and Technological Research Council of Turkey (TUBITAK) Ankara, Turkey [107G252]
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A kinetic modeling-based study was carried out to evaluate the start-up performance of a 10-L up-flow anaerobic sludge blanket (UASB) reactor treating municipal wastewater under different organic and hydraulic loading conditions. The reactor was operated for 105 days (around 4 months) below 20 A degrees C and with three different hydraulic retention times of 24, 12 and 5 h. Imposed volumetric organic loading rates (OLR) ranged from 0.57 (+/- 0.05) to 11.78 (+/- 0.85) kg TCOD/m(3)-day. Although relatively high incoming volumetric OLR values were employed to the system, the UASB reactor demonstrated a favorable performance on the anaerobic treatability of municipal wastewater, and no process failure was recorded in the start-up stage. On the basis of experimental results, the modified Stover-Kincannon model was successfully applied to define the start-up kinetics with a very high value of the correlation coefficient (R = 0.9729). Maximum substrate utilization rate constant and saturation constant of the modified Stover-Kincannon model were determined as U (max) = 1.996 g/L-day and K (B) = 1.536 g/L-day, respectively.
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