Air distribution system

The design of the aeration system in a biological plant that uses biomass technology attached to moving supports is of fundamental importance for the level of performance you are looking to achieve.

Our experience favours medium bubble air distribution nets which are able to cover the entire surface on the bottom of the oxidation tanks, made of stainless steel and designed not to require any kind of maintenance.

The presence of carriers dispersed in the biological volume ensures the fragmentation of the air bubbles generated by the  diffusers net into smaller particles, achieving an oxygen transfer yield similar to that obtained by a fine bubble diffusion system in a conventional biological plant. The mechanical energy transferred provides an excellent level of mixing and the oxygen can easily reach the surface of the biofilm thus feeding the biological process.

The variables to consider when dimensioning an air diffusers net are:

  • number and positioning of the air feeding pipes
  • number of diffusers and the relative positioning
  • diameter and length of the diffusers pipes
  • diameter and density of the air passage holes
  • air speed in the circuit
  • head losses generated by the diffusers net

Main features:

  • Possibility to work up to high carrier filling coefficients in biological tank (m3/m3)
  • Longevity
  • Extraction for cleaning is not required
  • Ability to drain the tank leaving the carriers inside without being damaged due to their weight
  • Low investment costs

However, it is possible to use micro-bubble diffusion networks paying particular attention to the correct design of the system in relation to the maximum amount of filling ratio that can be sustained, making sure that they can be extracted for maintenance and that they are equipped with appropriate guides for repositioning the tank in the presence of a carrier.