The role of fouling mechanisms in a membrane bioreactor

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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

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Fouling
Bioreactors
fouling
bioreactor
membrane
Membranes
Sieves
aeration
Wastewater
wastewater
reactor
Fibers

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

Cita questo

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title = "The role of fouling mechanisms in a membrane bioreactor",
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",
keywords = "Fouling; MBR; membrane bioreactor; resistance; start-up; transmembrane pressure",
author = "Gaspare Viviani and {Di Bella}, Gaetano and Michele Torregrossa and Cicala and Mercurio",
year = "2007",
language = "English",
volume = "55",
pages = "455--464",
journal = "Water Science and Technology",
issn = "0273-1223",
publisher = "IWA Publishing",

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TY - JOUR

T1 - The role of fouling mechanisms in a membrane bioreactor

AU - Viviani, Gaspare

AU - Di Bella, Gaetano

AU - Torregrossa, Michele

AU - Cicala, null

AU - Mercurio, null

PY - 2007

Y1 - 2007

N2 - 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

AB - 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

KW - Fouling; MBR; membrane bioreactor; resistance; start-up; transmembrane pressure

UR - http://hdl.handle.net/10447/36655

M3 - Article

VL - 55

SP - 455

EP - 464

JO - Water Science and Technology

JF - Water Science and Technology

SN - 0273-1223

ER -