Sub-critical fouling in a membrane bioreactor for municipal wastewater treatment: Experimental investigation and mathematical modelling

Guglielmi, Giuseppe; Saroj, Devendra; Chiarani, Daniele; Andreottola, Gianni

doi:10.1016/j.watres.2007.05.047

Cited by 72 publications

(52 citation statements)

References 17 publications

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“….h -1 (Guglielmi et al, 2007;Le Clech et al, 2006). A partir desses valores, a ocorrência da deposição irreversível, que exige paradas para limpeza química, passa ser muito frequente, compromentendo a capacidade de produção do sistema e inviabilizando o projeto.…”

Section: Resultados Do Tratamento Biológicounclassified

Avaliação da remoção de matéria orgânica carbonácea e nitrogenada de águas residuárias em biorreator de membranas

Bezerra

Matsumoto²

2011

Eng. Sanit. Ambient.

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O presente trabalho objetivou a avaliação da remoção de matéria orgânica carbonácea e nitrogenada, bem como a determinação do fluxo crítico, em biorreator de membranas, com zona pré-anóxica, tratando águas residuárias industriais da produção de aminoácidos. O reator foi operado sob carga orgânica volumétrica de 1,91 kg.DQO.m-3.d-1 e 0,18 kg.NTK.m-3.d-1; a recirculação do reator aeróbio para o reator anóxico foi de quatro vezes a vazão afluente. O reator apresentou médias de remoção de DQO, NTK e NT de 97, 98 e 92%, respectivamente. O sistema de ultrafiltração foi testado em vários fluxos entre 25 e 37 L.m-2.h-1 e determinou-se o fluxo crítico de 28 L.m-2.h-1 quando operado com 11,4 g.L-1 de SST e 35 dias de tempo de retenção celular. Os resultados mostraram que houve viabilidade técnica no uso de biorreator de membranas para remoção de matéria orgânica de águas residuárias industriais da produção de aminoácidos.

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Section: Resultados Do Tratamento Biológicounclassified

Avaliação da remoção de matéria orgânica carbonácea e nitrogenada de águas residuárias em biorreator de membranas

Bezerra

Matsumoto²

2011

Eng. Sanit. Ambient.

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“…It is assumed that the rate of reduction in the effective area is proportional to the mass of free EPS (C f Q) and bound EPS (C b Q) and is relevant to the permeate flux flow Q (Guglielmi et al, 2007). In mathematical terms:…”

Section: A Model Based On the Concepts Of The Spatial Local Flux Distmentioning

confidence: 99%

“…According to this model, the local flux reaches its maximum at the outlet and is inversely proportional to 3. When the value of 3 is reduced to an extent because of the gradual fouling of the membrane (Guglielmi et al, 2007), the local flux at the outlet increases gradually to the point at which when the system reaches the critical state. This state can be explained by the radial balance of forces on a particle.…”

Section: A Model Based On the Concepts Of The Spatial Local Flux Distmentioning

confidence: 99%

“…Moreover, the critical flux hypothesis has been extensively applied to all membrane systems (Guglielmi et al, 2007), with the aim of reducing membrane fouling rate and maintain MBR performance. The critical flux hypothesis was presented originally by Field et al in 1995(Field et al, 1995 and two distinct forms of the concept have been defined.…”

Section: Introductionmentioning

confidence: 99%

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Study of a membrane bioreactor with glass fiber flat grille modules and the modules' optimization based on the local critical flux theory

Yuan

Fan

et al. 2010

Water Research

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MBR IntroductionIn recent years, the membrane bioreactor (MBR) process, which is considered to be a good integration of the conventional activated sludge (CAS) system and the micro-filtration (MF) or ultrafiltration (UF) membrane separation processes (Williams and Pirbazari, 2007), has gained worldwide attraction and popularity due to its small footprint, low sludge production and good effluent quality (Wang et al., 2006). According to a technical market research report (Hanft, 2006), the global market for membrane bioreactor is rising at an average annual growth rate of 10.9%, and is expected to approach US$363 million in 2010 with the market for membrane modules up to US$157 million.However, there are three major drawbacks preventing the wide application of this process, including high cost of membrane modules, low membrane strength especially for hollow fibers and the potential rapid loss of performance due to membrane fouling (Fan and Huang, 2002; Zhou et al., 2008). The dynamic membrane bioreactor (DMBR) process, which usually uses mesh, no woven fabric, and filter-cloth as filter media, is one of the solutions to these problems. The dynamic membrane is also known as secondary membrane or formed-in-place membrane. When filtering a feed solution containing fine particles, a dynamic or secondary layer of rejected particles is formed on the underlying primary filter surface (Kuberkar and Davis, 2000). Once the membrane has become severely fouled, the dynamic layer can be replaced by a new deposited layer, that * Corresponding author. Tel./fax: þ86 10 62849108. E-mail address: yaobofan@hotmail.com (Y. Fan).A v a i l a b l e a t w w w . s c i e n c e d i r e c t . w a t e r r e s e a r c h 4 4 ( 2 0 1 0 ) 9 9 7 -1 0 0 5

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“…Its feasibility has been mainly assessed at aerobic conditions (see v.g. Guglielmi et al, 2006Guglielmi et al, , 2007. Moreover, no references have been found regarding HF-SAnMBR application at semi-industrial scale treating urban wastewater.…”

Section: Introductionmentioning

confidence: 99%

Influence of total solids concentration on membrane permeability in a submerged hollow-fibre anaerobic membrane bioreactor

Robles

Durán

Ruano

et al. 2012

Water Science and Technology

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IWA PublishingRobles Martínez, Á.; Durán Pinzón, F.; Ruano García, MV.; Ribes Bertomeu, J.; Ferrer Polo, J. (2012) AbstractThe main aim of this work was to study the influence of the Mixed Liquor Total Solids (MLTS) concentration on membrane permeability (K20) in a Submerged Anaerobic Membrane Bioreactor (SAnMBR) pilot plant, which is equipped with industrial hollow-fibre membranes and treats urban wastewater. This pilot plant was operated at 33 ºC and 70 days of SRT. Two different transmembrane fluxes (13.3 and 10 LMH) were tested with a gas sparging intensity of 0.23 Nm 3 m -2 h -1 (measured as Specific Gas Demand referred to membrane area). A linear dependence of K20 on MLTS concentration was observed within a range of MLTS concentration from 13 to 32 g L -1and J20 of 10 LMH. K20 maintained at sustainable values (about 100 LMH bar -1 ) even at high MLTS concentrations (up to 20 g L -1 ). In addition, several short-tests were carried out when the membranes were operated at high MLTS concentrations in order to assess the effect of the physical cleaning strategies (relaxation and back-flush) on membrane performance. It was observed that, with the applied gas sparging intensity, the duration of the relaxation stage did not critically affect the membrane performance. On the other hand, the required back-flush frequency was considerably affected by the MLTS concentration.

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Sub-critical fouling in a membrane bioreactor for municipal wastewater treatment: Experimental investigation and mathematical modelling

Cited by 72 publications

References 17 publications

Avaliação da remoção de matéria orgânica carbonácea e nitrogenada de águas residuárias em biorreator de membranas

Avaliação da remoção de matéria orgânica carbonácea e nitrogenada de águas residuárias em biorreator de membranas

Study of a membrane bioreactor with glass fiber flat grille modules and the modules' optimization based on the local critical flux theory

Influence of total solids concentration on membrane permeability in a submerged hollow-fibre anaerobic membrane bioreactor

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