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Steady‐State Analysis in Activated Sludge Process Design
Author(s) -
Mc Lellan J. C.,
Busch A. W.
Publication year - 1968
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr004i006p01307
Subject(s) - activated sludge , effluent , steady state (chemistry) , mixed liquor suspended solids , substrate (aquarium) , process (computing) , volume (thermodynamics) , chemistry , material balance , waste management , pulp and paper industry , environmental science , wastewater , environmental engineering , process engineering , thermodynamics , engineering , physics , computer science , operating system , oceanography , geology
A mass balance on a completely mixed biological reactor allows several significant facts about the performance of the activated sludge process to be determined and some of the basic concepts of biological waste treatment to be illustrated. A steady‐state solution to the equation obtained from the mass balance on substrate is used to determine the reactor volume required. The governing factor in process performance is shown to be the rate at which a unit mass of organisms operates at the desired effluent substrate concentration. Examples are given to show how control of the mixed liquor suspended solids concentration can minimize or offset the effects of changes in flow and influent substrate concentration on effluent substrate concentration.