Biological Treatment of Sewage by the Activated Sludge ProcessThis review of existing knowledge of the purification of sewage by the activated sludge process is written from the viewpoint of the hydrobiologist. It considers all the most important technical factors, such as the influence of aeration systems and secundary clarifiers on the biological performance of activated sludge plants. In a survey the emphasisis is placed on theoretical aspects of the activated sludge process from a biological point of view. The biocoenosis of activated sludge, and its value as an indicator for the biological status of activated sludge are discussed. In addition, the successes and mistakes of management from a biological ange are reviewed |
Contents
Preface to the original edition | 9 |
Characterisation of the properties of sewage and activated sludge | 26 |
Organisms | 56 |
Copyright | |
11 other sections not shown
Common terms and phrases
acclimatisation according to TGL acid activated sludge biomass activated sludge flocs activated sludge plants activated sludge process activated sludge system aeration system aeration tank aerobic bacteria biocoenosis BOD5 carbon chemical ciliates citric acid cycle coagulation compounds concentration constituents Curve decomposition denitrification digester liquor disinfectants dissolved oxygen effluent effluent quality elimination energy enzymes final settling tank flowrate g/m³ h gram-negative growth heavy metal hence hydrogen increased industrial effluents inhibition kg/kg kg/m³ liquid metabolism metazoa mg/g h mg/l municipal sewage nitrate nitrification nitrogen nutrient occur operation organic substrates oxygen demand oxygen input pathogenic phosphate phosphorus polyphosphate primary settling tank proteins protozoa reaction reactor recycled sludge reduced removal result saprobic sewage treatment sludge age sludge biomass sludge loading sludge production sludge recycle species stabilisation stage substances substrate sulphide surface surplus sludge Table temperature treated effluent treatment performance utilisation values Vorticella waste activated sludge water quality