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  1. No Access

    Article

    Effects of colloidal fouling and gas sparging on microfiltration of yeast suspension

    Cross-flow microfiltration is an important step in separating Baker’s yeast (Saccharomyces cerevisiae) from aqueous suspension in many processes. However the permeate flux often declines rapidly due to colloidal ...

    B. Sen. Gupta, S. Hasan, M. A. Hashim, Z. F. Cui in Bioprocess and Biosystems Engineering (2005)

  2. No Access

    Article

    Particle-bubble attachment in yeast flotation by colloidal gas aphrons

    Flotation of microorganisms by colloidal gas aphrons (CGAs) is recognised as an inexpensive and effective method of separation. CGAs are micro-sized gas bubbles of 25 μm in average diameter and each is encaps...

    M. A. Hashim, S. V. Kumar, B. Sen Gupta in Bioprocess Engineering (2000)

  3. No Access

    Article

    Mass transfer correlation in flotation of palm oil by colloidal gas aphrons

    Colloidal gas aphrons (CGAs) are micron-sized bubbles, which are produced by stirring a dilute surfactant solution at a high speed. In this work, CGAs have been used to clarify oily wastewater by flotation te...

    M. A. Hashim, Avijit Dey, Shameem Hasan, B. Sen Gupta in Bioprocess Engineering (1999)

  4. No Access

    Article

    The effect of pore size distribution on the separation efficiency in surface force pore-flow model-system: isopropanol-water

     The surface force pore-flow (SFPF) model is based on solute-membrane material interactions at the membrane-solution interface. It has been used to model the transport of solute and solvent through membranes u...

    B. S. Gupta, M. A. Hashim, Z. F. Cui in Bioprocess Engineering (1999)

  5. No Access

    Article

    Immobilization of urease using Amberlite MB-1

    Amberlite MB-1 was used to immobilize urease (EC.3.5.1.5). The thermal stability of the immobilized urease was better than that of the free urease. Its highest activity was obtained at 75 °C and at pH 6.5 whi...

    A. Anita, C. A. Sastry, M. A. Hashim in Bioprocess Engineering (1997)

  6. No Access

    Article

    Urease immobilized on nylon: preparation and properties

    Urease (EC 3.5.1.5) was covalently attached through glutaraldehyde to partially hydrolysed nylon 6/6 tubes. The highest activity of immobilized enzyme was obtained at 65 °C and pH 6.5, while the optimum tempe...

    A. Anita, C. A. Sastry, M. A. Hashim in Bioprocess Engineering (1997)