Sludge Age, Stability, and Safety Factor for the Biofilm‐Activated Sludge Process Reactor
The average sludge age (c) of the activated sludge process (ASP)‐biofilm were developed and verified experimentally. In addition, the stability and safety factor were investigated against c through a series of curves. These curves are important to explain, in concept, the function of the hybrid system under different values of c. The proposed curves of this study are simple and can be modified for any specified wastewater. The definition of 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 c to give close results with the experimental values. Furthermore, the minimum sludge age (M c ) does not exist in the hybrid reactor because of the presence of biofilm; however, c should come down to a critical value under some specific conditions of the reactor.
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Document Type: Research Article
Publication date: 2012-06-01
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Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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