Study of aeration rate influence on microalgae membrane photoreactor : fouling and nitrogen removal rate
Paper ID : 1350-MST2015-FULL
atefeh alipourzadeh, Mohammad Reza Mehrnia *, ahmad hallaj, Azadeh Babaei
Biotechnology group, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Membrane Fouling is one of the most important problems that happened in the membrane bioreactor. This study was carried out to investigate the membrane fouling phenomena due to algal deposition and nitrogen removal rate by changing aeration rate as one the effective operating conditions. According to the results, the maximum resistance of the fouled membrane was happened when it was no aeration in broth media, which caused 69.8% reduction in flux and its flux was equal to 10.09 L/hr.m2. the resistance decreased by increasing aeration rate While in the maximum amount (5 L/min), cake layer formation resistance was at its lowest value (1.05×1011 m-1) so membrane permeance recovery became 93.3%, and the constant fouled membrane flux was 53.04% more than other conditions. By increasing aeration rate ,the nitrogen removal rate and microalgae concentration were increased. At aeration rate of 5 L/min, maximum value of nitrogen removal and microalgae concentration were obtained that were equal to 82% and 1.73 mg/L respectively.
membrane bioreactor, fouling, microalgae, nitrogen removal
Status : Paper Accepted (Poster Presentation)