Algerian Journal of Engineering Research
Volume 3, Numéro 1, Pages 27-30
2019-06-01

Biomass Activity And Species Assessment In A Submerged Membrane Bioreactor Operating At High Srt And Low Cod/n Using Respirometric Analysis And Modeling



Authors : Benaliouche Hana . Abdessemed Djamal . Lesage Geoffroy . Heran Marc .

Abstract

In this paper, respirometric analysis and Activated Sludge Model (ASM) had been evaluated in order to identify and quantify the fraction of active biomass of activated sludge in a submerged Membrane Bioreactor (sMBR). Heterotrophic biomass (XBH), Autotrophic biomass responsible of nitrite production (XBAI) and Autotrophic biomass responsible of nitrate production (XBAA) had been quantified within activated sludge fed with soluble and easily biodegradable substrate (ethanol/sodium acetate (1:1)). This synthetic wastewater, containing no hardly biodegradable organic or inorganic particulate matter, led to the generation of a sludge constituted essentially of two fractions: XBH and XBA. Specific respirometric measurements of endogenous and exogenous activities ensured the integrity of ASM and the development of equations for the quantification of active biomass in these models. The results highlighted the growth of this specific biomass under high SRT and substrate limited conditions.

Keywords

Membrane bioreactor; Heterotrophic; Autotrophic; Respirometric activity; Activated sludge, soluble microbial products.

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