08.08.2015   BIOMASS NOW - CULTIVATION AND UTILIZATION

Carriers material characteristics and impact on attachment conditions and biomass structure

For the MBBR pollutants removal efficiency and biomass concentration the crucial role plays the material of which carriers were made (table 1). The basic features are as follow: material type, specific surface area, shape and size of carriers and other features: porous surface, e. g. polyurethane or not porous material surface e. g. polyethylene [27,28].

Material

Density,

g/cm3

Specific surface area, m2/m3

Type of carrier

References

Cellulose (foamed)

—

—

continuous macro­porous, Aquacel, 1-5 mm

[20]

Polyvinylformal (PVF)

—

—

cubic, 3 mm

[20]

PVA-gel beads

—

—

—

[23]

Polyethylene (PE)

—

—

K1, EvU-Perl

[55]

Nonwoven fabric

—

900

—

[56]

Reticulated polyester urethane sponge (foam)

0.028

(volumetric

density)

S45R, S60R, S90R, Joyce Foam Products

[57]

Polypropylene (PP)

1.001

230-1400

cylindrical rings 4 mm

[58]

Polyethylene (PE)

0.95

230-1400

cylinders 7 mm/10 mm

[59]

Polyethylene (PE)

—

—

Kaldnes, Natrix, Biofilm — Chip

[60]

Polyurethane coated with activated carbon

—

35,000

cubes (1.3 cm), Samsung Engineering Co

[61]

Table 1. Selected types of carriers and material of which carriers were made

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