The effect of photoautotrophic culture of chlorella vulgaris on ammonia removal by using membrane bioreactor
Paper ID : 1219-MST2015-FULL
Authors:
Azadeh Babaei1, Mohammad Reza Mehrnia *1, Jalal Shayegan2, Mohammad Hossein Sarrafzadeh3
1Biotechnology group, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
2Department of Chemical Engineering, Sharif University of Technology, Tehran, Iran
3UNESCO Chair on Water Reuse, School of Chemical Engineering, College of Engineering, University of Tehran, Iran
Abstract:
In recent years, microalgae, unicellular organism, are used to decrease nutrient as pollution in wastewater, fix carbon dioxide and produce, since as they spontaneously convert CO2 and supplementary nutrients into biomass in the presence of light via photosynthesis, and potentially at higher rates than conventional oil-producing crops. Use of membrane bioreactors containing microalgae could combine wastewater treatment processes with the productivity of biomass for recovery of nutrient as well as the production of e.g. bioenergy . In this study, a new design of bioreactor equipped with a submerged membrane and working volume of 1.5 liter which acts as a solid–liquid separator is proposed. This experimental protocol was defined to examine the effect of photoautotrophic culture of Chlorella vulgaris on the ammonia removal and microalgae biomass in batch and continuous cultivation. In this study, a submerged membrane bioreactor with working volume of 1.5 liter was used. The maximum microalgae concentration was achieved in continuous and batch mode on day 21 and 11 (0.65 and 0.39 gr/L), respectively. The microalgae were able to reduce the N-NH3 concentration to 61% in continuous mode.
Keywords:
Ammonia removal, membrane bioreactor, microalgae, photoautotrophic culture
Status : Paper Accepted (Poster Presentation)