Nutrients Removal Control via an Intermittently Aerated Membrane Bioreactor
Nitrogen is among the main nutrients encouraging the growth of organic matter and algae which cause eutrophication in water bodies. Therefore, its removal from wastewater has become a worldwide emerging concern. In this research, an innovative Membrane Bioreactor (MBR) system named “moving bed membrane bioreactor (MBMBR)” was developed and investigated under intermittently-aerated mode for simultaneous removal of organic carbon and nitrogen.
Results indicated that the variation of the intermittently aerated duration did not have an apparent impact on COD and NH4+–N removal rate, yielding the effluent with average COD and NH4+–N removal efficiency of more than 92 and 91% respectively. However, in the intermittently aerated cycle of (continuously aeration/0s mix), (aeration 90s/mix 90s) and (aeration 90s/mix 180s); the average TN removal efficiency was 67.6%, 69.5% and 87.8% respectively. At the same time, their nitrite accumulation rate was 4.5%, 49.1% and 79.4% respectively. These results indicate that the intermittently aerated mode is an efficient way to controlling the nitrification to stop at nitrition; and also the length of anoxic duration is a key factor in improving TN removal.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1093291Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1936
 Leiknes T, Ødegaard H. The development of a biofilm membrane bioreactor. Desalination, 2007, 202(1-2-3): 135-143.
 Rusten B, Eikebrokk B, Yngve U, Lygren E. Design and operations of the Kaldnes moving bed biofilm reactors. Aquacultural Engineering, 2006, 34(3): 322-331
 Williams SC, Beresford J (1998) The effect of anaerobic zone mixing on the performance of a three-stage Bardenpho plant. Water SciTechnol 38(1):55–62.
 Pai TY, Tsai YP, Chou YJ, Chang HY, Leu HG, Ouyang CF (2004) Microbial kinetic analysis of three different types of EBNR process. Chemosphere 55: 109–118
 Canziani R, Emondi V, Garavaglia M et al. Effect of oxygen concentration on biological nitrification and microbial kinetics in a cross-flow membrane bioreactor (MBR) and moving-bed biofilm reactor (MBBR) treating old landfill leachate. Journal of Membrane Science, 2006, 286(1-2): 202-212.
 Suvilampi E, Marja A, Tiirola et al. Microbial diversity in a thermophilic aerobic biofilm process: analysis by length heterogeneity PCR (LH-PCR). Water Research, 2003, 37(10): 2259-2268.
 Andreottola G, Foladori P, Ragazzi M et al. Experimental comparison between MBBR and activated sludge system for the treatment of municipal wastewater. Water Sci.Technol, 2000, 41(4-5): 375-382.
 Rusten B, Kolkinn O, Ødegaard H. Moving bed biofilm reactors and chemical precipitation for high efficiency treatment of wastewater from small communities. Water Science and Technology, 1997, 35(6): 71-79.
 Gunder, B., Krauth, K., 1998. Replacement of secondary clarification by membrane separation–results with plate and hollow fiber modules. Water Science and Technology 38 (4–5), 383–393.
 Anderson, G.K., Saw, C.B., Fernandez, M.I.A.P., 1986. Applications of porous membranes for biomass retention in biological wastewater treatment processes. Process Biochemistry 12, 174–182.
 Yamagiwa, K., Yoshida, M., Ito, A., et al. 1998. A new oxygen supply method for simultaneous organic carbon removal and nitrification by a one-stage biofilm process. Water Science and Technology 37, 117–124.
 APHA, 1995. Standard Methods for the Examination of Water and Wastewater. American Public Health Association.