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Effect of fasting condition on multi‐substrate carbon oxidation and nitrification system in an upflow packed‐bed biofilm reactor
Author(s) -
Beg Shafkat Ali,
Hassan Mirza Manirul,
Chaudhry Muhammad Arshad Saeed
Publication year - 1997
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.270200303
Subject(s) - nitrification , chemistry , methanol , packed bed , biofilm , nitrogen , oxygen , carbon fibers , inorganic chemistry , chromatography , materials science , bacteria , organic chemistry , biology , genetics , composite number , composite material
The performance of an upflow packed‐bed biofilm reactor has been analyzed under multisubstrate limitation by considering simultaneous carbon oxidation and nitrification reactions. The fasting shock load of inlet methanol concentration has a much more pronounced effect on the response of the system compared to that of inlet NH 4 + ‐nitrogen concentration. The exit concentration of NH 4 + ‐nitrogen drops very close to zero, thereby showing essentially complete nitrification during methanol fasting condition. Further, the concentration profiles of oxygen within the biofilm show significant variation during methanol fasting and nonfasting conditions whereas during NH 4 + ‐nitrogen fasting conditions the oxygen concentration profile in the biofilm remains essentially unaffected.