Microbiological Endogenous Processes in Biological Wastewater Treatment Systems

REFERENCES

• Aertsen , A. and Michiels , C. W. 2004 . Stress and how bacteria cope with death and survival . Crit. Rev. Microbiol. , 30 : 263
   PubMed Web of Science ®Google Scholar
• Arbrige , M. and Chesbro , W. R. 1982 . Very slow growth of Bacillus polymyxa: Stringent responses and maintenance energy . Arch. Microbiol. , 132 : 338
   Web of Science ®Google Scholar
• Avcioglu , E. , Orhon , D. and Sözen , S. 1998 . A new method for the assessment of heterotrophic endogenous respiration rate under aerobic and anoxic conditions . Water Sci. Tech. , 38 ( 8–9 ) : 95
   Web of Science ®Google Scholar
• Beun , J. J. , Paletta , F. , van Loosdrecht , M. C. M. and Heijnen , J. J. 2002 . Stoichiometry and kinetics of poly- b-hydroxybutyrate metabolism in aerobic, slow growing activated sludge cultures . Biotechnol. Bioeng. , 67 ( 4 ) : 379
   Web of Science ®Google Scholar
• Beun , J. J. , Verhoef , E. V. , van Loosdrecht , M. C. M. and Heijnen , J. J. 2002 . Stoichiometry and kinetics of poly-b-hydroxybutyrate metabolism under denitrifying conditions in activated sludge cultures . Biotechnol. Bioeng. , 68 ( 5 ) : 496
   Web of Science ®Google Scholar
• Bloem , J. , Starink , M. , Bär-Gilissen , M. J. B. and Cappenberg , T. E. 1988 . Protozoan grazing, bacterial activity, and mineralization in two-stage continuous culture . Appl. Environ. Microbiol. , 54 : 3113
   PubMed Web of Science ®Google Scholar
• Brands , E. , Liebeskind , M. and Dohmann , M. 1994 . Parameters for dynamic simulation of wastewater treatment plants with high-rate and low-rate activated sludge tanks . Water Sci. Tech. , 30 ( 4 ) : 211
   Web of Science ®Google Scholar
• Brdjanovic , D. , van Loosdrecht , M. C. M. , Hooijmans , C. M. , Alaerts , G. J. and Heijnen , J. J. 1997 . Temperature effects on physiology of biological phosphorus removal . J. Envir. Eng. , 123 ( 2 ) : 144
   Web of Science ®Google Scholar
• Brdjanovic , D. , Slamet , A. , van Loosdrecht , M. C. M. , Hooijmans , C. M. , Alaerts , G. J. and Heijnen , J. J. 1998 . Impact of excessive aeration on biological phosphorus removal from wastewater . Water Res. , 32 ( 1 ) : 200
   Web of Science ®Google Scholar
• Bulthuis , B. A. , Frankena , J. , Koningstein , G. M. , van Verseveld , H. W. and Stouthamer , A. H. 1988 . Instability of protease production in a rel+/rel− pair of Bacillus licheniformis and associated morphological and physiological characteristics . Antonie Leeuwenhoek , 54 : 95
   PubMedGoogle Scholar
• Cech , J. S. and Hartman , P. 1990 . Glucose-induced break down of enhanced biological phosphate removal . Environ Technol. , 11 : 651
   Web of Science ®Google Scholar
• Chen , G. , Yip , W. K. , Mo , H. K. and Liu , Y. 2001 . Effect of sludge fasting/feasting on growth of activated sludge cultures . Water Res. , 35 ( 4 ) : 1029
   PubMed Web of Science ®Google Scholar
• Coello-Oviedo , M. D. , López-Ramírez , J. A. , Márquez , D. S. and Quiroga Alonso , J. M. 2003 . Evolution of an activated sludge system under starvation conditions . Chem. Eng. J. , 94 : 139
   Web of Science ®Google Scholar
• Comeau , Y. , Hall , K. J. , Hancock , R. E. W. and Oldham , W. K. 1986 . Biochemical model for enhanced biological phosphorus removal . Water Res. , 20 : 1511
   Web of Science ®Google Scholar
• Curds , C. R. 1973 . The role of protozoa in the activated sludge process . American Zoologist , 13 ( 1 ) : 161
   Google Scholar
• Curds , C. R. 1982 . The ecology and role of protozoa in aerobic sewage treatment processes . Ann. Rev. Microbiol. , 36 : 27
   PubMed Web of Science ®Google Scholar
• Dauner , M. , Storni , T. and Sauer , U. 2001 . Bacillus subtilis metabolism and energetics in carbon-limited and excess-carbon chemostat culture . J. Bacteriol. , 183 ( 24 ) : 7308
   PubMed Web of Science ®Google Scholar
• Dircks , K. , Beun , J. J. , van Loosdrecht , M. C. M. , Heijnen , J. J. and Henze , M. 2001 . Glycogen metabolism in aerobic mixed cultures . Biotechnol. Bioeng. , 73 : 85
   PubMed Web of Science ®Google Scholar
• Dold , P. L. , Ekama , G. and Marais , G. V. R. 1980 . A general model for activated sludge process . Prog. Water Tech. , 12 ( 6 ) : 47
   Google Scholar
• Dold , P. L. , Jones , R. M. and Bye , C. M. 2005 . Importance and measurement of decay rate when assessing nitrification kinetics . Water Sci. Tech. , 52 ( 10–11 ) : 469
   PubMed Web of Science ®Google Scholar
• Ekama , G. A. , Dold , P. L. and Marais , G. V. R. 1986 . Procedures for determining influent COD fractions and the maximum specific growth rate of heterotrophs in activated sludge systems . Water Sci. Tech. , 18 ( 6 ) : 91
   Web of Science ®Google Scholar
• Filipe , C. D. M. , Daigger , G. T. and Grady , C. P. L. 2001 . A metabolic model for acetate uptake under anaerobic conditions by glycogen accumulating organisms: Stoichiometry, kinetics, and the effect of pH . Biotechnol. Bioeng. , 76 : 17
   PubMed Web of Science ®Google Scholar
• Filipe , C. D. M. , Daigger , G. T. and Grady , C. P. L. 2001 . Stoichiometry and kinetics of acetate uptake under anaerobic conditions by an enriched culture of phosphorus-accumulating organisms at different pHs . Biotechnol. Bioeng. , 76 : 32
   PubMed Web of Science ®Google Scholar
• Fried , J. , Mayr , G. , Berger , H. , Traunspurger , W. , Psenner , R. and Lemmer , H. 2000 . Monitoring protozoa and metazoan biofilm communities for assessing wastewater quality impact and reactor up-scaling effects . Water Sci. Technol. , 41 : 309
   Web of Science ®Google Scholar
• Frigon , D. , Muyzer , G. , van Loosdrecht , M. C. M. and Lutgarde , S. 2006 . rRNA and poly-β -hydroxybutyrate dynamics in bioreactors subjected to feast and famine cycles . Appl. Environ. Microbiol. , 72 ( 4 ) : 2322
   PubMed Web of Science ®Google Scholar
• Geets , J. , Boon , N. and Verstraete , W. 2006 . Strategies of aerobic ammonia-oxidizing bacteria for coping with nutrient and oxygen fluctuations . FEMS Micribiol. Ecol. , 58 : 1
   PubMed Web of Science ®Google Scholar
• Ghyoot , W. and Verstraete , W. 2000 . Reduced sludge production in a two-stage membrane-assisted bioreactor . Water Res. , 34 ( 1 ) : 205
   Web of Science ®Google Scholar
• Gujer , W. , Henze , M. , Mino , T. , Matsuo , M. C. , Wentzel , M. C. and Marais , G. V. R. 1995 . The activated sludge model no. 2: Biological phosphorus removal . Water Sci. Tech. , 31 ( 2 ) : 1
   Web of Science ®Google Scholar
• Gujer , W. , Henze , M. , Mino , T. and van Loosdrecht , M. C. M. 1999 . Activated sludge model no. 3 . Water Sci. Tech. , 39 ( 1 ) : 183
   Web of Science ®Google Scholar
• Henze , M. , Grady , C. P. L. , Gujer , W. , Marais , G. V. R. and Matsuo , T. 1987 . Activated sludge model no. 1. IAWPRC Scientific and Technical Report, No. 1 , London : IAWPRC .
   Google Scholar
• Henze , M. , Guyer , W. , Mino , T. , Matsuo , T. , Wentzel , M. , Marais , G. V. R. and van Loosdrecht , M. C. M. 1999 . Activated sludge model No. 2d, ASM 2D . Water Sci. Tech. , 39 ( 1 ) : 165
   Web of Science ®Google Scholar
• Herbert , D. Some principles of continuous culture . Recent progress of microbiology: 7th. Int. Congr. Microbiol . Edited by: Tunevall , G. pp. 381 Oxford : Blackwell .
   Google Scholar
• Herbert , K. C. and Foster , S. J. 2001 . Starvation survival in Listeria monocytogenes: Characterization of the response and the role of known and novel components . Microbiology , 147 : 2275
   PubMed Web of Science ®Google Scholar
• Hochman , A. 1997 . Programmed cell death in prokaryotes . Crit. Rev. Microbiol. , 23 : 207
   PubMed Web of Science ®Google Scholar
• Horan , N. J. 1990 . Biological wastewater treatment systems: Theory and operation , New York : Wiley & Sons .
   Google Scholar
• Katehis , D. , Fillos , J. and Carrio , L. A. 2002 . Comparation of bench scale testing methods for nitrifier growth rate measurement . Water Sci. Tech. , 46 ( 1–2 ) : 289
   PubMed Web of Science ®Google Scholar
• Keen , G. A. and Prosser , J. I. 1987 . Steady-state and transient growth of autotrophic nitrifying bacteria . Arch. Microbiol. , 147 ( 1 ) : 73
   Web of Science ®Google Scholar
• Keller , J. , Yuan , Z. and Blackall , L. 2002 . Integrating process engineering and microbiology tools to advance activated sludge wastewater treatment research and development . Rev. Environ. Sci. Biotechnol. , 1 ( 1 ) : 83
   Google Scholar
• Kjelleberg , S. , Albertson , N. , Flärdh , K. , Holmquist , L. , Jouper-Jaan , Å. , Marouga , R. , Östling , J. , Svenblad , B. and Weichart , D. 1993 . How do non-differentiating bacteria adapt to starvation? . Antoine van Leeuwenhoek , 63 : 333
   PubMed Web of Science ®Google Scholar
• Konopka , A. , Zakharova , T. and Nakatsu , C. 2002 . Effect of starvation length upon microbial activity in a biomass recycle reactor . J. Ind. Microbial. Biotechnol. , 29 : 286
   PubMed Web of Science ®Google Scholar
• Kuba , T. , Murnleitner , E. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1996 . Amotebolic model for biological phosphorus removal by denitrifying organisms . Biotechnol. Bioeng. , 52 ( 6 ) : 685
   PubMed Web of Science ®Google Scholar
• Landry , M. R. and Hassett , R. P. 1982 . Estimating the grazing impact of marine micro-zooplankton . Mar. Biol. , 67 ( 3 ) : 283
   Web of Science ®Google Scholar
• Lavallée , B. , Lessard , P. and Besser , C. 2002 . Decay rate variability of active heterotrophic biomass . Water Sci. Tech. , 46 ( 1–2 ) : 423
   PubMed Web of Science ®Google Scholar
• Lavallée , B. , Lessard , P. and Vanrolleghem , P. A. 2005 . Modeling the metabolic adaptations of the biomass under rapid growth and starvation conditions in the activated sludge process . J. Environ. Eng. Sci. , 4 ( 6 ) : 533
   Web of Science ®Google Scholar
• Lee , N. M. and Welander , T. 1994 . Influence of predators on nitrification in aerobic biofilm processes . Water Sci. Technol. , 29 : 355
   Web of Science ®Google Scholar
• Lee , N. M. and Walender , T. 1996 . Use of protozoa and metazoa for decreasing sludge production in aerobic wastewater treatment . Biotechnol. Lett. , 18 ( 4 ) : 429
   Web of Science ®Google Scholar
• Lee , N. M. and Welander , T. 1996 . Reducing sludge production in aerobic wastewater treatment through manipulation of the ecosystem . Water Res. , 30 ( 8 ) : 1781
   Web of Science ®Google Scholar
• Lee , S. H. , Satoh , H. , Katayama , H. and Mino , T. 2004 . Isolation, physiological characterization of bacteriophages from enhanced biological phosphorus removal activated sludge and their putative role . J. Microbiol. Biotechnol. , 14 ( 4 ) : 730
   Web of Science ®Google Scholar
• Lee , Y. and Oleszkiewicz , J. A. 2003 . Effects of predation and ORP conditions on the performance of nitrifiers in activated sludge systems . Water Res. , 37 ( 17 ) : 4202
   PubMed Web of Science ®Google Scholar
• Lesouef , A. , Payraudeau , M. , Rogalla , F. and Kleiber , B. 1992 . Optimizing nitrogen removal reactor configurations by on-site calibration of the IAWPRC activated sludge model . Water Sci. Tech. , 25 ( 6 ) : 105
   Web of Science ®Google Scholar
• Lewis , K. 2000 . Programmed death in bacteria . Microbiol. Mol. Biol. Rev. , 64 : 503
   PubMed Web of Science ®Google Scholar
• Liang , P. , Huang , X. , Qian , Y. , Wei , Y. and Ding , G. 2006 . Determination and comparison of sludge reduction rates caused by microfaunas' predation . Bioresour. Technol. , 97 : 854
   PubMed Web of Science ®Google Scholar
• Lopez , C. , Pons , M. N. and Morgenroth , E. 2006 . Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorous removal . Water Res. , 40 : 1519
   PubMed Web of Science ®Google Scholar
• Low , E. W. and Chase , H. A. 1999 . The effect of maintenance energy requirements on biomass production during wastewater treatment . Water Res. , 33 ( 3 ) : 847
   Web of Science ®Google Scholar
• Luxmy , B. S. , Nakajima , F. and Yamamoto , K. 2000 . Predator grazing effect on bacterial size distribution and floc size variation in membrane-separation activated sludge . Water Sci. Tech. , 42 ( 3–4 ) : 211
   Web of Science ®Google Scholar
• Madoni , P. 1994 . A sludge biotic index (SBI) for the evaluation of the biological performance of activated sludge plants based on the microfauna analysis . Water Res. , 28 : 67
   Web of Science ®Google Scholar
• Manser , R. , Gujer , W. and Siegrist , H. 2006 . Decay processes of nitrifying bacteria in biological wastewater treatment systems . Water Res. , 40 : 2416
   PubMed Web of Science ®Google Scholar
• Martinage , V. and Paul , E. 2000 . Effect of environmental parameters on autotrophic decay rate (b(A)) . Environ. Technol. , 21 ( 1 ) : 31
   Web of Science ®Google Scholar
• Mason , C. A. , Hamer , G. and Bryers , J. D. 1986 . The death and lysis of microorganisms in environmental processes . FEMS Microbiol. Rev. , 39 : 373
   Google Scholar
• Miyake , H. and Morgenroth , E. 2005 . Optimization of enhanced biological phosphorus removal after periods of low loading . Water Environ. Res. , 77 ( 2 ) : 117
   PubMed Web of Science ®Google Scholar
• Morgenroth , E. , Obermayer , A. , Arnold , E. , Bruhl , A. , Wagner , M. and Wilderer , P. A. 2000 . Effect of long-term idle periods on the performance of sequencing batch reactors . Water Sci. Technol. , 41 ( 1 ) : 105
   Web of Science ®Google Scholar
• Moussa , M. S. , Hooijmans , C. M. , Lubberding , H. J. , Gijzen , H. J. and van Loosdrecht , M. C. M. 2005 . Modeling nitrification, heterotrophic growth and predation in activated sludge . Water Res. , 39 ( 20 ) : 5080
   PubMed Web of Science ®Google Scholar
• Murnleitner , E. , Kuba , T. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1997 . An integrated metabolic model for the aerobic and denitrifying biological phosphorus removal . Biotechnol. Bioeng. , 54 : 434
   PubMed Web of Science ®Google Scholar
• Neijssel , O. M. and Tempest , D. W. 1976 . Bioenergetic aspects of aerobic growth of Klebsiella aerogenes NCTC 418 in carbon-limited and carbon-sufficient chemostat culture . Arch. Microbiol. , 107 ( 2 ) : 215
   PubMed Web of Science ®Google Scholar
• Neijssel , O. M. , Buurman , E. T. and Teixeira de Mattos , M. J. 1990 . The role of futile cycles in the energetics of bacterial growth . Biochim. Biophys. Acta , 1018 : 252
   PubMedGoogle Scholar
• Nowak , O. , Svardal , K. , Franz , A. and Kuhn , V. 1999 . Degradation of particulate organic matter—a comparison of different model concepts . Water Sci. Tech. , 39 ( 1 ) : 119
   Web of Science ®Google Scholar
• Otawa , K. , Lee , S. H. , Yamazoe , A. , Onuki , M. , Satoh , H. and Mino , T. 2007 . Abundance, diversity, and dynamics of viruses on microorganisms in activated sludge processes . Microb. Ecol. , 53 ( 1 ) : 143
   PubMed Web of Science ®Google Scholar
• Pernthaler , J. 2005 . Predation on prokaryotes in the water column and its ecological implications . Nature Rev. Microbiol. , 3 : 537
   PubMed Web of Science ®Google Scholar
• Pirt , S. J. 1965 . The maintenance energy bacteria in growing cultures . Proc. Roy. Soc. Series B , 163 : 224
   PubMed Web of Science ®Google Scholar
• Pirt , S. J. 1982 . Maintenance energy: A general model for energy-limited and energy-sufficient growth . Arch Microbiol. , 133 : 300
   PubMed Web of Science ®Google Scholar
• Ratsak , C. H. , Maarsen , K. A. and Kooijman , A. L. M. 1996 . Effects of protozoa on carbon mineralization in activated sludge . Water Res. , 30 ( 1 ) : 1
   Web of Science ®Google Scholar
• Rice , K. C. and Bayles , K. W. 2003 . Death's toolbox: Examining the molecular components of bacterial programmed cell death . Mol. Microbiol. , 50 : 729
   PubMed Web of Science ®Google Scholar
• Rieger , L. , Koch , G. , Kuhni , M. , Gujer , W. and Siegrist , H. 2001 . The EAWAG Bio-P module for activated sludge model no. 3 . Water Res. , 35 ( 16 ) : 3887
   PubMed Web of Science ®Google Scholar
• Roszak , D. B. and Colwell , R. R. 1987 . Survival strategies of bacteria in the natural environment . Microbiol. Rev. , 51 : 365
   PubMedGoogle Scholar
• Salem , S. , Berends , D. H. J. G. , van der Roest , H. F. , van der Kuij , R. J. and van Loosdrecht , M. C. M. 2004 . Full-scale application of the BABE® technology . Water Sci. Tech. , 50 ( 7 ) : 87
   PubMed Web of Science ®Google Scholar
• Salem , S. , Moussa , M. S. and van Loosdrecht , M. C. M. 2006 . Determination of the decay rate of nitrifying bacteria . Biotechnol. Bioeng. , 94 ( 2 ) : 252
   PubMed Web of Science ®Google Scholar
• Salvadó , H. , Gracia , M. P. , Rius , M. and Amigó , J. M. 1995 . Capability of ciliated protozoa as indicators of effluent quality in activated sludge plants . Water Res. , 29 : 1041
   Web of Science ®Google Scholar
• Senez , J. C. 1962 . Some considerations on the energetics of bacterial growth . Bacteriol. Rev. , 26 : 95
   PubMedGoogle Scholar
• Sherr , B. S. and Sherr , B. F. 2002 . Significance of predation by protests in aquatic microbial food webs . Antonie van Leeuwenhoek , 81 : 293
   PubMed Web of Science ®Google Scholar
• Siegrist , H. , Brunner , I. , Koch , G. , Phan , L. C. and Le , V. C. 1999 . Reduction of biomass decay rate under anoxic and anaerobic conditions . Water Sci. Technol. , 39 ( 1 ) : 129
   Web of Science ®Google Scholar
• Sleator , R. D. and Hill , C. 2001 . Bacterial osmoadaptation: The role of osmolytes in bacterial stress and virulence . FEMS Microbiol. Rev. , 26 : 49
   Web of Science ®Google Scholar
• Smolders , G. J. F. , van der Meij , J. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1994 . Model of the anaerobic metabolism of the biological phosphorus removal process: Stoichiometry and pH influence . Biotechnol. Bioeng. , 42 : 461
   Web of Science ®Google Scholar
• Smolders , G. J. F. , van der Meij , J. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1994 . Stoichiometric model of the aerobic metabolism of the biological phosphorus removal process . Biotechnol. Bioeng. , 44 : 837
   PubMed Web of Science ®Google Scholar
• Smolders , G. J. F. , van der Meij , J. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1995 . A structured metabolic model for the anaerobic and aerobic stoichiometry and kinetics of the biological phosphorus removal process . Biotechnol. Bioeng. , 47 : 277
   PubMed Web of Science ®Google Scholar
• Spellman , F. R. 1997 . Wastewater biosolids to compost , 223 Lancaster, Pa. : Technomic Publishing Company .
   Google Scholar
• Tappe , W. , Laverman , A. , Bohland , M. , Braster , M. , Rittershaus , S. , Groeneweg , J. and van Verseveld , H. W. 1999 . Maintenance energy demand and starvation recovery dynamics of Nitrosomonas europaea and Nitrobacter winogradskyi cultivated in a retentostat with complete biomass retention . Appl. Microbiol. Biotechnol. , 65 ( 6 ) : 2471
   Google Scholar
• Teixeira , de , Mattos , M. J. and Neijssel , O. M. 1997 . Bioenergetic consequences of microbial adaptation to low-nutrient environments . J. Biotechnol. , 59 : 117
   PubMed Web of Science ®Google Scholar
• Tempest , D. W. and Neijssel , O. M. 1984 . The status of YATP and maintenance energy as biologically interpretable phenomena . Ann. Rev. Microbiol. , 38 : 459
   PubMed Web of Science ®Google Scholar
• Tijhuis , L. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1993 . A thermodynamically based correlation for maintenance Gibbs energy requirements in aerobic and anaerobic chemotrophic growth . Biotechnol. Bioeng. , 42 ( 4 ) : 509
   PubMed Web of Science ®Google Scholar
• Tsai , S. P. and Lee , Y. H. 1990 . A model for energy-sufficient culture growth . Biotechnol. Bioeng. , 35 ( 2 ) : 138
   PubMed Web of Science ®Google Scholar
• Vadivelu , V. M. , Yuan , Z. , Fux , C. and Keller , J. 2006 . Stoichiometric and kinetic characterization of Nitrobacter in mixed culture by decoupling the growth and energy generation processes . Biotechnol. Bioeng. , 94 ( 6 ) : 1176
   PubMed Web of Science ®Google Scholar
• Vadivelu , V. M. , Keller , J. and Yuan , Z. 2006 . Stoichiometric and kinetic characterization of Nitrosomonas sp. in mixed culture by decoupling the growth and energy generation processes . J. Biotechnol. , 126 ( 3 ) : 342
   PubMed Web of Science ®Google Scholar
• Van Aalst-Van Leeuwen , M. A. , Pot , M. A. , van Loosdrecht , M. C. M. and Heijnen , J. J. 1997 . Kinetic modeling of poly(β -hydroxybutyrate) production and consumption by Paracoccus pantotrophus under dynamic substrate supply . Biotechnol. Bioeng. , 55 : 773
   PubMed Web of Science ®Google Scholar
• Van Loosdrecht , M. C. M. and Henze , M. 1999 . Maintenance, endogenous respiration, lysis, decay and predation . Water Sci. Tech. , 39 ( 1 ) : 107
   Web of Science ®Google Scholar
• Van Loosdrecht , M. C. M. , Dircks , K. , Beun , J. J. and Heijnen , J. J. 2000 . Discussion of modelling of energy spilling in substrate-sufficient cultures . J. Envir. Eng. , 126 ( 10 ) : 979
   Google Scholar
• Van Verseveld , H. W. , Chesbro , W. R. , Braster , M. and Stouthamer , A. H. 1984 . Eubacteria have three growth modes keyed to nutrient flow . Arch. Microbiol. , 137 : 176
   PubMed Web of Science ®Google Scholar
• Weinbaner , M. G. 2004 . Ecology of prokaryotic viruses . FEMS Microbiol. Rev. , 28 : 127
   PubMed Web of Science ®Google Scholar
• Wei , Y. S. , Van Houten , R. T. , Borger , A. R. , Eikelboom , D. H. and Fan , Y. 2003 . Minimization of excess sludge production for biological wastewater treatment . Water Res. , 37 ( 18 ) : 4453
   PubMed Web of Science ®Google Scholar
• Wommack , K. E. and Colwell , R. R. 2000 . Virioplankton: Viruses in aquatic ecosystems . Microbiol. Mol. Biol. Rev. , 64 ( 1 ) : 69
   PubMed Web of Science ®Google Scholar
• Yarmolinsky , M. B. 1995 . Programmed cell death in bacterial populations . Science , 267 : 836
   PubMed Web of Science ®Google Scholar
• Yuan , Z. and Blackall , L. 2002 . Sludge population optimisation, a new dimension for the control of biological wastewater treatment systems . Water Res. , 36 ( 2 ) : 482
   PubMed Web of Science ®Google Scholar
• Zeng , A. P. and Deckwer , W. D. 1995 . A kinetic model for substrate and energy consumption of microbial growth under substrate-sufficient conditions . Biotechnol. Prog. , 11 : 71
   PubMed Web of Science ®Google Scholar
• Zeng , R. J. , van Loosdrecht , M. C. M. , Yuan , Z. and Keller , J. 2003 . Metabolic model for glycogen-accumulating organisms in anaerobic/aerobic activated sludge systems . Biotechnol. Bioeng. , 81 : 92
   PubMed Web of Science ®Google Scholar