adsorbing, porous carrier material for special microorganisms
LEVAPOR-C, porous, adsorbing carrier material

Fig. 1. LEVAPOR-C, porous, adsorbing carrier material (electron microscop photo)

LEVAPOR-C is an innovative carrier material for the immobilization of microorganisms, consisting of a porous polymeric matrix with a specially activated surface.

The problem
How does LEVAPOR work?
The advantages of using LEVAPOR-C
The biotreatment of complex effluents, containing poorly degradable pollutants is often problematic, because it requires special strains, which show poor sedimentation, leading to their wash-out from the reactor and resulting in a less efficient biotreatment process.

A very effective method to improve bioprocesses is

the immobilization of the biomass, which means

the fixation of microbial cells on solid surfaces by building biofilms resulting in higher

  • biomass concentration in the bioreactor,
  • degradation efficiency and process stability,
  • resistance to temperature-, pH- and toxic/load peaks and
  • a lower yield of excess sludge production.

LEVAPOR-C should be used, if
* the effluents show
  • slow growth,
  • qualitative fluctuations,
  • high salinity and/or
  • toxic or inhibitory effects.
* the biomass shows
  • low biodegradability
  • low tendency to flocculation and/or
  • low settling velocity.
The activation of the surface results in
  • faster wetting and
  • better colonization of the LEVAPOR-surface with microorganisms and in adsorptive
  • binding of pollutants.

  • Areas of application

    Biological treatment of
    • municipal and indstrial waste water
    • contaminated groundwater and soils and
    • waste gases with immobilized specialized microorganisms
    LEVAPOR can be applied in following effluent treatment processes and situations:
    • nitrification
    • poorly degradable pollutants
    • inhibitory pollutants
    • suboptimal flocculation and settling behavior
    • high salinity effluents
    Types of bioreactors
    Activated sludge process:
    - fluidized bed reactors,
    - 12 to 15 vol.% degree of filling,
    - retention of LEVAPOR-C in the reactor
    Bio-Trickling Filters
    - for waste water and waste gases
    - 50 to 75 vol.% degree of filling
    • The activated surface results in faster and better
    • wetting and fluidization of the carrier material,
    • binding of toxic pollutantsvia adsorption,
    • colonization with microorganisms
    • The increased quantity of biomass in the reactor achieve
    • higher process stability,
    • higher volume-time-yields and
    • higher sludge age.
    • Protection of organisms inside of the carrier, against high shear forces and inhibitors
    • Retention of slowly settling biomass
    • Low degree of reactor filling
    • Existing basins can be upgraded
    • Very good colonization of the inner surface
    • Optimal mass transfer into the carrier/microbial cell
    • Simple retention of the carrier
    • Special efforts for excess sludge removal not required


    Fig. 2. Fluidized LEVAPOR-C cubes

    Technical data
    Form: cuboids cubes
    Dimension (mm): 14 x 14 x 7 14 x 14 x 14
    to 20 x 20 x 8 40 x 40 x 40
    Block density (kg/m³): ca. 50 75 - 100
    Bulk weight (kg/m³): ca. 20 40 - 50
    Material density (g/cm³): 1,04 - 1,1 -
    Degree of reactor filling: 10 - 15 Vol. % > 50 %
    Preferred types of reactors: fluidized bed fixed bed
        trickling filters
    Excess sludge removal: via aeration via aeration
    Settling velocities:
    a.) without biomass colonization, W50 (m/h)
    ca. 50 -
    b.) with biomass colonization, W50 (m/h) ca. 70 -

    This side is part one Framesets