Impact of synthetic or real urban wastewater on membrane bioreactor (MBR) performances and membrane fouling under stable conditions.
Influence of substrate type (synthetic (SWW) or real wastewater (RWW)) on lab scale MBR performances (e.g. COD and N-NH4(+) removal rates and bioactivities) was assessed. Membrane fouling was related to MBR biological medium characteristics. With RWW, autotrophic biomass was better acclimated with complete ammonium removal. MBR biological medium was characterized by main soluble microbial products (SMP) (proteins, polysaccharides and humic-like substances) quantification and molecular weights (MW) distribution determination. The biological medium of SWW acclimation contained 60mgL(-1) more of SMP, mainly composed of proteins and polysaccharides. A protein fraction having high MW (>600kDa) could be responsible for higher removable fouling fraction in that case. SMP of RWW experiment were mainly composed of small proteic and humic-like fractions, poorly retained by the membrane and resulting in a weak augmentation of irremovable and irreversible fouling fractions compared to SWW acclimation. Therefore RWW utilization is preferable to approach real operating MBR.
Aix-Marseille Université, CNRS, M2P2 UMR 7340, 13545 Aix en Provence, France. Electronic address: maud.villain@univ-montp2.fr.
Maud
M
Villain
Université de Limoges, GRESE EA 4330, 123 avenue Albert Thomas, 87060 Limoges, France.
Isabelle
I
Bourven
Université de Limoges, GRESE EA 4330, 123 avenue Albert Thomas, 87060 Limoges, France.
Gilles
G
Guibaud
Aix-Marseille Université, CNRS, M2P2 UMR 7340, 13545 Aix en Provence, France.
Benoît
B
Marrot
D064751:Ammonium Compounds / Q000302:isolation & purification; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D002947:Cities; D005453:Fluorescence; D008567:Membranes, Artificial; D010101:Oxygen Consumption; D010316:Particle Size; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
D064751:Ammonium Compounds; D008567:Membranes, Artificial; D062065:Wastewater; D014874:Water Pollutants, Chemical
Biomass activity; Fouling; Membrane bioreactor; Soluble microbial products; Substrate type