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By C. P. Leslie Grady Jr., Glen T. Daigger, Nancy G. Love, Carlos D. M. Filipe

ISBN-10: 142000963X

ISBN-13: 9781420009637

Creation and BackgroundClassification of Biochemical OperationsThe function of Biochemical OperationsCriteria for ClassificationCommon "Named" Biochemical OperationsKey PointsStudy QuestionsReferencesFundamentals of Biochemical OperationsOverview of Biochemical OperationsMajor varieties of Microorganisms and Their RolesMicrobial Ecosystems in Biochemical OperationsImportant tactics in Biochemical OperationsKey Read more...

summary: creation and BackgroundClassification of Biochemical OperationsThe function of Biochemical OperationsCriteria for ClassificationCommon "Named" Biochemical OperationsKey PointsStudy QuestionsReferencesFundamentals of Biochemical OperationsOverview of Biochemical OperationsMajor sorts of Microorganisms and Their RolesMicrobial Ecosystems in Biochemical OperationsImportant approaches in Biochemical OperationsKey PointsStudy QuestionsReferencesStoichiometry and Kinetics of Aerobic/Anoxic Biochemical OperationsStoichiometry and Generalized response RateBiomass development and Substrate UtilizationSoluble

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Sample text

Some stabilization will occur in the biochemical operation removing the soluble organic matter, but most will occur in operations designed specifically for that purpose. Insoluble organic matter comes from the wastewater itself and from the growth of microorganisms as they remove soluble organic matter. Because these solids can be removed from the wastewater by settling, they are normally concentrated by sedimentation before being subjected to stabilization by biochemical means. Stabilization is accomplished both aerobically and anaerobically, although anaerobic stabilization is more energy efficient.

Furthermore, by changing the nature of the electron acceptor temporally, it is also possible to accomplish nutrient removal in a single bioreactor. Because their operation follows a sequence of events, they are commonly called sequencing batch reactors (SBRs). A perfect plug-flow reactor (PFR) is one in which fluid elements move through in the same order that they enter, without intermixing. Thus, the perfect PFR and the CSTR represent the two extreme ends of the continuum of all possible degrees of mixing.

Thus, engineers attempt to remove pollutants in the most efficient way, concentrating Classification of Biochemical Operations 5 them where possible to reduce the volumes that must be handled. For insoluble constituents this can be accomplished by the physical operation of sedimentation, which is why it is often one of the first unit operations in a treatment system. The effluent from a sedimentation basin (overflow) contains all of the soluble constituents in the influent, plus those insoluble ones that were too small to be removed.

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Biological Wastewater Treatment, Third Edition by C. P. Leslie Grady Jr., Glen T. Daigger, Nancy G. Love, Carlos D. M. Filipe


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