José Antonio Gil

Delft University of Technology

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Jules B. van Lier

IHE Delft Institute for Water Education

J.H.J.M. van der Graaf

Delft University of Technology

Daniel Prats

University of Alicante

Paweł Krzemiński

Norwegian Institute for Water Research

Elmar Dorgeloh

RWTH Aachen University

A.F. van Nieuwenhuijzen

Japan External Trade Organization

Manuel Rodríguez Pastor

University of Alicante

Adriana C. Rueda

University of Alicante

L. Túa

University of Alicante

Nicolás Ratkovich

Universidad de Los Andes

Cooperative Institutions

University of Alicante

Delft University of Technology

University of Castilla-La Mancha

Universidad de Los Andes

Aalborg University

Japan External Trade Organization

Norwegian Institute for Water Research

Krakow University of Economics

University of Wrocław

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Start-up of decentralized MBRs

Desalination (2011)

José Antonio Gil Elmar Dorgeloh Jules B. van Lier J.H.J.M. van der Graaf Daniel Prats

Membrane bioreactor

Volatile suspended solids

Particle (ecology)

Sedimentation

10.1016/j.desal.2011.10.022

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Citations (5)

Influence of temperature variations on the cake resistance and EPS of MBR mixed liquor fractions

Desalination and Water Treatment (2010)

José Antonio Gil L. Túa Adriana C. Rueda Manuel Rodríguez Pastor Daniel Prats

Abstract Few studies have been carried out to correlate the infl uence of temperature on the filterability of different mixed liquor fractions, i.e. suspended solids, colloidal matter and soluble organic matter. It is known that temperature has a big impact on the flux in microfi ltration processes. The aim of this research was to figure out the impact of temperatures in the range of 10°C to 40°C on fouling, especially in terms of the release of particles and soluble microbial products (SMP). Results based on the contribution of each fraction, namely mixed liquor (>1 μm), supernatant (1 μm to 1 nm) and soluble (<1 nm), to fouling, suggest that the colloids present in the supernatant are affected by temperature changes. Low and high temperatures result in deflocculation and formation/release processes respectively, resulting in a release of submicron particles and were observed due to retention changes. Similar values of the cake resistance for all the fractions and for the range of temperatures studied, indicate that all submicron/colloidal particles within the range 0.05–0.4 μm have a similar infl uence in terms of fouling. No correlation was found between the concentration of EPS and the cake resistance, which indicates that (an)other foulant(s) could contribute to the cake resistance. Finally, low retentions of both polysaccharides and proteins were observed at 40°C. Keywords: Cake resistanceExtracellular polymeric substances (EPS)Membrane foulingTemperature

Colloidal particle

Membrane Fouling

Fraction (chemistry)

10.5004/dwt.2010.1225

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Citations (9)

Flat sheet or hollow fibre — comparison of full-scale membrane bio-reactor configurations

Desalination and Water Treatment (2012)

Paweł Krzemiński José Antonio Gil A.F. van Nieuwenhuijzen J.H.J.M. van der Graaf Jules B. van Lier

Membrane bioreactors (MBRs) are widely used for wastewater treatment and reuse applications.Selection of a membrane confi guration is a crucial step in the design process and has a high impact on further plant operations.Despite increasing experience with full-scale applications, practical knowledge concerning the impact of different membrane confi gurations on process performance and operational costs is still lacking.This paper provides full scale MBR performance data comparing the use of fl at sheet and hollow fi bre membranes and analyses the consequences on operation, performance and treatment effi ciency.Hollow fi bre confi gurations, comparing to the fl at sheet, are designed for higher fl uxes, operated at lower concentrations, cleaned more often and protected by stricter pre-treatment.Filterability of activated sludge from municipal MBRs is better than from industrial MBRs and does not depend on membrane confi guration.The energy consumption depends more on the infl uent type than on the membrane confi guration.

Hollow fiber membrane

10.5004/dwt.2012.2465

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Citations (9)

Analysis of the filterability in industrial MBRs. Influence of activated sludge parameters and constituents on filterability

Journal of Membrane Science (2011)

José Antonio Gil Paweł Krzemiński Jules B. van Lier J.H.J.M. van der Graaf T.J. Wijffels

Membrane Fouling

Membrane bioreactor

Filtration (mathematics)

Fraction (chemistry)

Hydraulic retention time

Membrane permeability

10.1016/j.memsci.2011.09.030

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Citations (28)

Start-up of decentralised MBRs Part II: the use of additives as initial inoculum

Desalination and Water Treatment (2012)

José Antonio Gil Elmar Dorgeloh Jules B. van Lier J.H.J.M. van der Graaf Daniel Prats

Abstract This paper corresponds to the second part of a study aiming to establish the best conditions to start-up decentralised membrane bioreactors. The first part focused on the impact of different operational parameters on the start-up, whereas this second part aims to find a substitute for activated sludge to serve as initial inoculum. Both low powdered activated carbon addition and Alumin 7 (alkaline coagulant) demonstrated a low performance in terms of filterability and operation. In turn, ferrous chloride (FeCl2), due to its ability to coagulate soluble and colloidal matter, was able to create a cake layer composed of large coagulated particles acting as a prefilter. Additionally, the combination of wastewater plus FeCl2 allowing sufficient contact time before the filtration starts has demonstrated to be the best way to start-up decentralised membrane bioreactor using this additive. Eventhough some drawbacks are associated with its high acidity, i.e. low pH, high conductivity and low removal, the excellent filterabilities observed and the possibility to create a cake layer from "zero-biomass" convert this additive as a possible substitute for activated sludge. This is supported by particle size distribution measurements suggesting that the negative effects of fine particles are outweighed by the possibility of creating a cake layer that impedes pore blocking.

Filtration (mathematics)

Membrane bioreactor

Zerovalent iron

Particle (ecology)

10.1080/19443994.2012.664740

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Citations (2)

MBR activated sludge viscosity measurement using the Delft filtration characterization method

Journal of Water Process Engineering (2015)

Jorge López Adrien Moreau José Antonio Gil J.H.J.M. van der Graaf Jules B. van Lier

Filtration (mathematics)

Membrane bioreactor

Characterization

Apparent viscosity

10.1016/j.jwpe.2014.11.006

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Citations (8)

Flat sheet or hollow fibre — comparison of full-scale membrane bio-reactor configurations

Desalination and Water Treatment (2012)

Paweł Krzemiński José Antonio Gil A.F. van Nieuwenhuijzen J.H.J.M. van der Graaf Jules B. van Lier

Abstract Membrane bioreactors (MBRs) are widely used for wastewater treatment and reuse applications. Selection of a membrane configuration is a crucial step in the design process and has a high impact on further plant operations. Despite increasing experience with full-scale applications, practical knowledge concerning the impact of different membrane configurations on process performance and operational costs is still lacking. This paper provides full scale MBR performance data comparing the use of flat sheet and hollow fibre membranes and analyses the consequences on operation, performance and treatment efficiency. Hollow fibre configurations, comparing to the flat sheet, are designed for higher fluxes, operated at lower concentrations, cleaned more often and protected by stricter pre-treatment. Filterability of activated sludge from municipal MBRs is better than from industrial MBRs and does not depend on membrane configuration. The energy consumption depends more on the influent type than on the membrane configuration.

Membrane bioreactor

Full scale

Membrane reactor

Scale-up

10.1080/19443994.2012.682963

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Citations (28)

Monitoring and analysis of the energy cost of an MBR

Desalination (2009)

José Antonio Gil L. Túa Adriana C. Rueda Borja Montaño Manuel Rodríguez Pastor

Membrane bioreactor

Total dissolved solids