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Advanced Reactor Design, Operation and Economy
76
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1986
Year
Sewage Sludge TreatmentEngineeringEnergy EfficiencyReactor DesignWaste TreatmentAdvanced Reactor DesignAnaerobic DigestionNuclear Reactor DesignWastewater TreatmentUasb SystemsChemical EngineeringBiogasBioremediationSystems EngineeringWater TreatmentNuclear Reactor OperationNuclear ReactorsModified Uasb SystemsNuclear EngineeringWaste ManagementNuclear PowerAdvanced Nuclear ReactorsNuclear Reactor EngineeringEnvironmental EngineeringUasb Ic
The UASB (Upflow Anaerobic Sludge Blanket) reactor is the most widely applied high‑rate anaerobic wastewater treatment system. The study focuses on the design, operation, and economy of UASB reactors, with particular attention to developing modified systems such as sludge‑bed/anaerobic‑filter combinations. Design considerations include the gas‑solids separator and feed inlet system, and modified UASB configurations such as floating‑settling, expanded granular sludge bed, and internal circulation reactors. Soluble wastewater generally requires no phase separation, high‑suspended‑solids streams may benefit from pre‑acidification, and only rough cost data are available for UASB reactors.
Of the high rate anaerobic wastewater treatment systems the UASB (Upflow Anaerobic Sludge Blanket) reactor has found the widest application. Therefore the attention with respect to design, operation and economy will be focussed on this reactor type. In designing a UASB reactor specific attention is needed for the GSS (Gas-Solids Separator) device and the feed inlet system. For soluble wastewater generally no phase separation is required. Only for wastewaters high in suspended solids pre-acidification in a separate acidification reactor can be beneficial. Increasing attention is given to the development of modified UASB systems, such as a combination of a sludge bed reactor and an anaerobic filter. Other possible modified UASB systems may be found in a FS (Floating Settling) UASB reactor, the EGSB (Expanded Granular Sludge Bed) reactor and the UASB IC (Internal Circulation) reactor. As many factors are involved in the costs of a UASB reactor, only some rough data on reactor costs are presented.