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Optimization Studies in an Inverse Fluidized Bed Bioreactor for Starch Wastewater Treatment
Rajasimman, M. & Karthikeyan, C.
Abstract
A solid - liquid - gas, multiphase reactor, called Inverse Fluidized Bed Bioreactor
(IFBBR) was used in this study for the treatment of starch industry wastewater of high organic
content and acidic nature. Mixed culture obtained from the sludge, taken from starch industry
effluent treatment plant, was used as microorganisms. Experiments were carried out in an Inverse
fluidized bed bioreactor, after the formation of biofilm on the surface of low-density particles (Density
= 870 kg/m3). Degradation was studied by varying the initial bed height i.e., 40, 60, 80 and 100cm and
for various gas flow rates for each initial bed height. From the results it was observed that a maximum
COD removal of 94.3% and BOD removal of 81% were achieved in this reactor. It occurs when the
bed height is 80 cm for the airflow rate 225 LPH. It was also observed that 70% removal of total
solids.
Keywords
Inverse fluidization, Starch, Multiphase reactor, Low density particles, Bed height
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