Author/Authors :
Nosratpour، Mohammad J. نويسنده Department of Chemical Engineering,Isfahan University of Technology,Isfahan,Iran , , Sadeghi، Morteza نويسنده Department of Chemical Engineering,Isfahan University of Technology,Isfahan,Iran , , Karimi، Keikhosro نويسنده Institute of Biotechnology and Bioengineering,Industrial Biotechnology Group, Industrial Biotechnology Group,Isfahan University of Technology,Isfahan,Iran , , Ghesmati، Saeid نويسنده Department of Chemical Engineering,Isfahan University of Technology,Isfahan,Iran ,
Abstract :
A 0.15 μm dead-end immersed hollow fiber membrane and filamentous fungus Aspergillus oryzae were used in a membrane bioreactor (MBR) for treatment of baker’s yeast wastewater. The fungus was adapted to the wastewater in the bioreactor for two weeks before continuous process. Average organic loading rate of 4.2 kg COD/m3.d was entered the bioreactor. COD and BOD5 of the wastewater were reduced to 488 and 70 mg/L, respectively, over a period of 45 days, while the turbidity of the wastewater reduced from 134-282 NTU to less than 2.5 NTU in the permeate stream. Critical flux and a suitable operating flux were determined as 6.7 and 5 L/m2 h, respectively. The system was able to efficiently reduce the turbidity and suspended solid by 99.4% and 98.3%, respectively, resulting in a clear effluent.
Keywords :
Wastewater treatment , Hollow fiber membrane , Baker’s yeast wastewater , Membrane bioreactor , Membrane fouling
