The role of fouling mechanisms in a membrane bioreactor.

Gaspare Viviani, Michele Torregrossa, Cicala, Mercurio, Gaetano Di Bella

Risultato della ricerca: Articlepeer review

19 Citazioni (Scopus)

Abstract

The present study has aimed to quantify the role of pore blocking and cake layer in a laboratoryscale hollow fibre membrane module in submerged configuration. The membrane reactor (MBR) was fedwith raw wastewater, only screened with a 2-mm sieve, collected from the Palermo WWTP. The MBR wascharacterised by an operating volume of 190 L and equipped with an aeration system located on the bottomof the reactor. The MBR operated for 65 days. The permeate was extracted by imposing a constant fluxthrough the membrane (21 Lh21m22). The results confirm the importance of pore blocking control duringstart-up. In particular, it provides a rapid irreversible fouling that takes place at the beginning of the filtrationprocess, before the deposition mechanism. Therefore, low suspended solids concentration in the initialphase causes a fast irreversible fouling. This circumstance creates the need for more frequent chemicalcleaning after start-up without inoculum. Finally, the results underline that the cake has a mainly reversiblefeature
Lingua originaleEnglish
pagine (da-a)455-464
Numero di pagine10
RivistaWater Science and Technology
Volume55 (8-9)
Stato di pubblicazionePublished - 2007

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

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