The effect of different nitrogen sources on membrane fouling in microalgal membrane bioreactor
Volume Title: 1
1Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
2Agriculture College of Islamic Azad University, Science and Research Branch, Tehran, Iran
3School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
In the present study, fouling was studied in microalgal membrane bioreactor under mixotrophic conditions in different nitrogen sources. N-rich wastewater, containing ammonium and nitrate source, was used as a nutrient source for cultivation of microalgae. The transmembrane pressure (TMP) jumping was seen in both nitrogen sources, while the TMP jumping in ammonium source was observed earlier than one in nitrate source. The results confirmed that the membrane fouling rates increased in ammonium source through increased production of carbohydrates in soluble microbial product (SMPc). It should be considered that both extracellular polymeric substances (EPS) and microbial soluble products (SMP) are important parameters for membrane fouling in microalgal membrane bioreactor.