Products > Filling materials > Biofilm filling materials: advantages and application

Biofilm filling materials: advantages and application

System advantages

  • High efficiency
  • Low energy consumption
  • No blockage problems
  • Low investment costs
  • Simplicity of installation
  • Minimum maintenance
  • Possibility of revamping existing installations

Application fields

  • Trickling filters for biological treatment installations on municipal discharges: trickling filter beds represent one of the oldest biological treatment systems for household waste water coming from the discharges of small communities. Up to now they have been used for small-to-medium sized plants and are characterised by very low energy consumptions. In these treatment systems the active bacteria require a support surface on which to develop and grow. MITA Biorulli’s margherita random and bioset structured fill is an ideal support medium, considering the large surface developed and its significant mechanical resistance to being squashed. margherita and bioset fills for trickling filter beds are ideal both for circular and rectangular or square-shaped tanks. The various bioset profiles which MITA Biorulli offers allow the construction of filter beds with layers of different specific surfaces, in order to differentiate between the active bacteria according to the different loads the effluent water contains.
  • Trickling filters for industrial biological treatment installations: trickling filter beds represent one of the oldest biological treatment systems. Still today they are employed by industries where low installation and operating costs are necessary and where limited maintenance is a pre-requisite. They are used more and more as a first stage of coarse load reduction, followed by a secondary, finer treatment of the waste water. MITA Biorulli’s margherita random and bioset structured fill is an ideal support medium, considering the large surface developed and its significant mechanical resistance to being squashed. margherita and bioset fill for trickling filters is perfectly compatible both with circular and rectangular tanks. The various bioset profiles which MITA Biorulli offers allow the construction of filter beds with layers of different specific surfaces, in order to differentiate between the active bacteria according to the different loads contained in the effluent water.
  • Revamping and upgrading of existing trickling filters: trickling filters system was a means of waste water treatment widely used in the past. Years ago “poor” materials found in nature such as wood, small stones etc. were used as a support surface/fill. Nowadays such materials are replaced with structured fills of the bioset type, which provides enormously superior contact surfaces in the same volume with significantly lower specific weights. margherita and bioset fills are employed preferably for rectangular and/or square-shaped trickling filters: they are simple to install and can increase the trickling filter treatment efficiency by as much as 10 times. Their format allows optimisation of the filling of the tank without the risk of dead zones or short-circuits. The various profiles with different densities and specific surfaces allow the construction of filter beds with layers differentiated by types of biomass and  according to the inlet load.

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