Table 1

A comparison of different types of reactors with biofilm reactors

Reactor Type
Comments

Membrane reactor

          Advantages
High productivities, high cell concentration can be achieved inside the reactor, clear permeates for further separation
          Disadvantages
Fouling with cells, cost prohibits their use in low cost large volume chemical production
Immobilized cell reactors

     Covalent bond formation

          Advantages
High cell concentration may be achieved, high productivity
          Disadvantages
Cell growth inside matrix may be restricted, cells leach out of the matrix and hence centrifugation of effluent may be required, chemical may affect the cells
     Entrapment

          Advantages
High cell concentration may be achieved, high productivity
          Disadvantages
Matrix often starts disintegration with time, cells leach out of matrix, centrifugation of reactor effluents is required for further separation
     Biofilm

          Advantages
Comparatively high reactor productivities and high cell concentrations are achieved, reactors run longer and are economic to operate
          Disadvantages
Effluent centrifugation is required

Qureshi et al. Microbial Cell Factories 2005 4:24   doi:10.1186/1475-2859-4-24