Performance of up flow anaerobic sludge fixed film bioreactor for the treatment of high organic load and biogas production of cheese whey wastewater
2014
Among various wastewater treatment technologies, biological wastewater
treatment appears to be the most promising method. A pilot scale of hybrid
anaerobic bioreactor was fabricated and used for the whey wastewater
treatment. The top and bottom of the hybrid bioreactor known as up flow
anaerobic sludge fixed film (UASFF); was a combination of up flow anaerobic
sludge blanket (UASB) and up flow anaerobic fixed film reactor (UAFF),
respectively. The effects of operating parameters such as temperature and
hydraulic retention time (HRT) on chemical oxygen demand (COD) removal and
biogas production in the hybrid bioreactor were investigated. Treatability of
the samples at various HRTs of 12, 24, 36 and 48 hours was evaluated in the
fabricated bioreactor. The desired conditions for COD removal such as HRT of
48 hours and operation temperature of 40 °C were obtained. The maximum COD
removal and biogas production were 80% and 2.40 (L/d), respectively. Kinetic
models of Riccati, Monod and Verhalst were also evaluated for the living
microorganisms in the treatment process. Among the above models, Riccati
model was the best growth model fitted with the experimental data with R2 of
about 0.99.
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