Activated Sludge Separation Problems: Theory, Control Measures, Practical Experiences

Cover -- Copyright -- Dedication -- Contents -- Abbreviations -- List of Contributors -- Preface -- Chapter 1: Wastewater characterization -- 1.1 Introduction -- 1.2 Gross Parameters -- 1.3 Physical Properties -- 1.4 Organic Matter -- 1.5 Inorganic Matter -- 1.6 Micropollutants -- 1.7 Biodegradability -- 1.7.1 COD, Nitrogen and phosphorus fractionation -- 1.7.2 Evaluation methods -- References -- Chapter 2: The microbiology of the activated sludge process -- 2.1 Introduction -- 2.2 Microorganisms in Activated Sludge -- 2.2.1 Bacteria: cell structure -- 2.2.2 Inclusions -- 2.3 The Identification of Bacteria -- 2.3.1 Conventional taxonomy -- 2.3.2 Molecular taxonomy -- 2.3.3 Molecular characterization of mixed biomass -- 2.4 Filamentous Bacteria -- 2.5 Microthrix parvicella -- 2.5.1 Identification of M. parvicella -- 2.5.2 Physiology of 'Candidatus M. parvicella' -- 2.6 Thiothrix -- 2.7 Nostocoida limicola -- 2.8 Polyphosphate Accumulating Organisms (PAO) -- 2.9 Glycogen Accumulating Organisms (GAO) -- 2.10 Nitrifiers -- 2.11 Denitrifiers -- References -- Chapter 3: Activated sludge separation problems -- 3.1 Introduction -- 3.2 'Well-settling' Activated Sludge -- 3.2.1 Requirements -- 3.2.2 Microscopic features of well settling activated sludge -- 3.3 Activated Sludge Separation Problems -- 3.3.1 Poor floc microstructure -- 3.3.2 Poor floc macrostructure -- 3.3.3 Other reasons -- 3.4 Summary -- Acknowledgment -- References -- Chapter 4: Aeration tank and secondary clarifier as one system -- 4.1 Introduction -- 4.2 Aeration Tank and Secondary Clarifier Interactions -- 4.2.1 Activated sludge process -- 4.2.2 Secondary clarifier -- 4.2.3 Separation function -- 4.2.4 BOD5 -- 4.2.5 COD -- 4.2.6 Nitrogen and phosphorus -- 4.3 The Impact of Aeration Basin Equipment and Operation on the Performance of Secondary Clarifiers.