Combining submerged membrane technology with anaerobic and ...

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colloidal BPC (mg·L -1 )Impact of a methanogenic pre-treatment on the performance of an aerobic MBR system5.4.5. Effect of external MLVSS source on membrane foulingIn order to study the impact of biopolymers release in the anaerobic digester, sludgefrom a municipal WWTP was fed to the UASB reactor in the period VII. As shown in figure5.6, colloidal BPC concentration increased remarkably when the addition of sludge started,confirming that the release of biopolymers took place due to the hydrolysis of this complexsubstrate in anaerobic conditions. Nevertheless, the same impact over membraneperformance that the one reported on periods I to VI was not observed. It has to be takeninto account that at the beginning of the periods I, III and VI (in which recirculation wasturned on), the effect of recirculation not only led to an increase of cBPC concentration butalso a rapid decrease of MLVSS concentration in both aerobic biofilm and membranefiltration chambers (0.5-2.0 g·L -1 ). Therefore, the membrane fouling observed could beexplained as a combined effect of both factors. The assumption is that with a high MLVSSconcentration, the membrane would be protected and the influence of the biopolymersreleased during the hydrolysis of aerobic biomass could be lower.After stopping the addition of external sludge on day 841, cBPC concentrationremained in high values due to the slow degradation of this complex substrateaccumulated in the UASB reactor (figure 5.6).160140120100806040200700 725 750 775 800 825 850 875Time (d)Figure 5.6. Evolution of cBPC concentration during period VI. In grey the period in whichexternal sludge from a WWTP was fed to the system.During the days in which the external addition of sludge to the methanogenic stagetook place, MLVSS concentration in the membrane filtration chamber was manipulated inorder to check the influence of this parameter on membrane fouling. The results presented143
Chapter 5in table 5.3 showed that higher MLVSS concentration led to lower observed fouling rateand higher critical flux and permeability. A detailed fouling trend has been described byRosenberger et al. (2005), where an increase in MLTSS reduced fouling at low MLTSSlevels (
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UNIVERSIDAD DE SANTIAGO DE COMPOSTE
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padres Macario y Marisa, les agrade
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2.1.2. Nitrogen compounds 662.1.2.1
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Chapter 4: Combining UASB and MBR f
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Objetivos y resumenEsta tesis se en
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Objetivos y resumenpermeabilidad de
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Objetivos y resumenuno de los pará
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Objetivos y resumenel sistema propu
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Objetivos y resumenconcentraciones
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Obxectivos e resumoauga tratada. O
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Obxectivos e resumoNo Capítulo 3,
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Obxectivos e resumog·L -1 , valore
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Obxectivos e resumoparámetros clav
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Objectives and summaryThis thesis i
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Objectives and summaryOn the basis
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Objectives and summaryfrom the MBR
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Objectives and summaryconsidering t
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Chapter 1IntroductionSummaryIn this
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IntroductionThe combination of memb
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IntroductionThe membranes should ha
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Introductionof water. Energy saving
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number of plants (cum. values)Intro
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IntroductionSubmerged MBR system in
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Introductionchanges of the foulant
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Introductionof 2% NaOH and 0.5% cit
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IntroductionFigure 1.8. Posible rel
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IntroductionSide-stream MBRs involv
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Introductionutilizes the advantages
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Introductionmeans of settlers, of s
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IntroductionUASB, achieving total n
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IntroductionEvenblij, H., van der G
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IntroductionMtinch, E.V., Ban, K.,
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IntroductionYang, S., Yang, F., Fu,
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Chapter 22.1. Liquid phaseIn this s
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Chapter 2where:M fas: molarity of F
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Acetic Acid (mg·L -1 )Chapter 2VFA
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N-NO 2-(mg·L -1 )Chapter 22.1.2.2.
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N-NO 3-(mg·L -1 )Chapter 2interfer
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P-PO 43-(mg·L -1 )Chapter 2Interfe
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Chapter 2alkalinity (IA), which is
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Chapter 22.2.3. Sludge volumetric i
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Chapter 2eq. 2.10eq. 2.11eq. 2.12Th
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Carbohydrate (mg·L -1 )Chapter 2In
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TEP (mgXG·L -1 )Chapter 22.4.4.4.
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Chapter 2Ripley, L.E., Boyle, W.C.,
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Chapter 33.1. IntroductionIn recent
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Chapter 3same in both modules; tap
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Chapter 3phases were varied (table
Page 105 and 106: Chapter 3to time was higher than 10
Page 107 and 108: COD removal (%)Chapter 3120100Perio
Page 109 and 110: DTN and N-NH 4+ (mg·L-1 )DTN and N
Page 111 and 112: Chapter 3operated with high MLTSS c
Page 113 and 114: TMP (kPa)TMP (kPa)TMP (kPa)TMP (kPa
Page 115 and 116: SMP carbohydrates (mg·L -1 )Chapte
Page 117 and 118: Volume (%)Chapter 3Therefore, the c
Page 119 and 120: Chapter 3identical to that of the c
Page 121 and 122: Chapter 3Massé, A. Spérandio, M.,
Page 123 and 124: Chapter 44.1. IntroductionThe appli
Page 125 and 126: Chapter 4support were added in this
Page 127 and 128: Chapter 4This cleaning was performe
Page 129 and 130: COD (mg·L -1 )COD removal (%)OLR (
Page 131 and 132: Chapter 4the recirculation ratio be
Page 133 and 134: (mg·L -1 )Chapter 4and ammonium) n
Page 135 and 136: Chapter 4recirculation from the MBR
Page 137 and 138: Chapter 4days 57 (period I) and 316
Page 139 and 140: Chapter 4excellent COD removal perf
Page 141 and 142: Chapter 4Rosenberger, S., Evenblij,
Page 143 and 144: Chapter 55.1. IntroductionAnaerobic
Page 145 and 146: Chapter 55.3. Material and methods5
Page 147 and 148: Chapter 5represented an increment o
Page 149 and 150: Chapter 5operating with similar mem
Page 151 and 152: Chapter 5behaviour might be related
Page 153 and 154: Fouling Rate (Pa·min -1 )Fouling R
Page 155: Concentration (mg·L -1 )DOC (mg·L
Page 159 and 160: Chapter 5Ho, J., Sung, S. 2010. Met
Page 162 and 163: Chapter 6Denitrification with disso
Page 164 and 165: Denitrification with dissolved meth
Page 174 and 175: (mg·L -1 )Denitrification with dis
Page 176 and 177: DTN effluent (mg·L -1 )CH 4 desorb
Page 186 and 187: Chapter 7Membrane fouling in an AnM
Page 188 and 189: Membrane fouling in an AnMBR treati
Page 194 and 195: OLR and ORR(kgCOD ·m -3·d -1 )pHO
Page 196 and 197: TEP removed (mg·L -1 )OA removed (
Page 198 and 199: R col (m -1 )SRF (m·kg -1 )Membran
Page 200 and 201: BPC, cBPC and TEP concentration(mg
Page 202 and 203: Cake and Colloidal Resistance (m -1
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Membrane fouling in an AnMBR treati
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Membrane fouling in an AnMBR treati
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Conclusionessentido, el uso de una
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Conclusionesensuciamiento de la mem
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Conclusiónspresenza de soporte de
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Conclusións6. Aplicabilidade e per
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ConclusionsMoreover, biomass concen
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Conclusionstechnology and interesti
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List of symbolsHFHRTHyVABHollow Fib
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List of symbolsFR/J Normalized Foul
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List of publicationsBrand, C., Sán
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List of publicationsConference on E
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