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  • Title: Exploring threshold operation criteria of biostimulation for azo dye decolorization using immobilized cell systems.
    Author: Chen BY, Yen CY, Chen WM, Chang CT, Wang CT, Hu YC.
    Journal: Bioresour Technol; 2009 Dec; 100(23):5763-70. PubMed ID: 19628386.
    Abstract:
    This follow-up study provided an evaluation on threshold operation criteria of biostimulation in immobilized cell systems (ICSs) with Aeromonas hydrophila onto packing materials Porites corals. Essential nutrients in appropriate flow rate for biostimulation were inevitably required to maintain maximum attached cell population for cost-effective biodecolorization. With the method of "graphical reconstruction", the most economically feasible strategy of medium stimulation for color removal was quantitatively revealed. Our findings pointed out no matter what operation mode of reactor was (e.g., suspended batch cultures or ICS) color removal efficiency for A. hydrophila still strongly depended upon intrinsic kinetics and chemical reactivities of azo dyes. Mass transport effects in ICS might not play most significant roles to limit dye biodecolorization of A. hydrophila (except Reactive red 198, Reactive green 19), as relative rankings of color removal rates of various dyes were almost in parallel with those in suspended batch cultures.
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