The role of fouling mechanisms in a membrane bioreactor

Risultato della ricerca: Article

18 Citazioni (Scopus)

Abstract

The present study has aimed to quantify the role of pore blocking and cake layer in a laboratory scale hollow fibre membrane module in submerged configuration. The membrane reactor (MBR) was fed with raw wastewater, only screened with a 2-mm sieve, collected from the Palermo WWTP. The MBR was characterised by an operating volume of 190 L and equipped with an aeration system located on the bottom of the reactor. The MBR operated for 65 days. The permeate was extracted by imposing a constant flux through the membrane (21 Lh21m22). The results confirm the importance of pore blocking control during start-up. In particular, it provides a rapid irreversible fouling that takes place at the beginning of the filtration process, before the deposition mechanism. Therefore, low suspended solids concentration in the initial phase causes a fast irreversible fouling. This circumstance creates the need for more frequent chemical cleaning after start-up without inoculum. Finally, the results underline that the cake has a mainly reversible feature
Lingua originaleEnglish
pagine (da-a)455-464
Numero di pagine10
RivistaWater Science and Technology
Volume55
Stato di pubblicazionePublished - 2007

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

Cita questo