text: A disadvantage with other biofilm processes is that they experience bioclogging and build-up of headloss. Depending on the type of waste and design of the process, several problems can occur during the full-scale process. Some of the disadvantages are:
  * Feed pipe/effluent sieve blocking
  * Nonhomogeneous mixing
  * Carrier voids blocking
  * Destroyed carriers
  * Carriers accumulating at the effluent sieves
  * Carrier overflow