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Sludge Age, Stability, and Safety Factor for the Biofilm‐Activated Sludge Process Reactor
Author(s) -
Fouad Moharram,
Bhargava Renu
Publication year - 2012
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143012x13354606451004
Subject(s) - activated sludge , biofilm , waste management , chemistry , environmental science , microbiology and biotechnology , sewage treatment , environmental engineering , biology , bacteria , engineering , genetics
The average sludge age (θ c ) of the activated sludge process (ASP)‐biofilm were developed and verified experimentally. In addition, the stability and safety factor were investigated against θ c through a series of curves. These curves are important to explain, in concept, the function of the hybrid system under different values of θ c . The proposed curves of this study are simple and can be modified for any specified wastewater. The definition of θ c of ASP was found to be applicable to the hybrid system after including the biofilm. A ratio ranging from 70 to 80% of the total mass of biofilm may be used in the definition of θ c to give close results with the experimental values. Furthermore, the minimum sludge age (θ M c ) does not exist in the hybrid reactor because of the presence of biofilm; however, θ c should come down to a critical value under some specific conditions of the reactor.