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Modelling of simultaneous methanogenesis and denitrification in an upflow packed‐bed biofilm reactor
Author(s) -
Chaudhry Muhammad Arshad S.,
Beg Shafkat A.
Publication year - 1997
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199711)70:3<267::aid-jctb743>3.0.co;2-4
Subject(s) - methanogenesis , methanol , steady state (chemistry) , denitrification , packed bed , chemistry , biofilm , inlet , analytical chemistry (journal) , materials science , chromatography , methane , nitrogen , biology , organic chemistry , mechanical engineering , bacteria , engineering , genetics
The performance of an upflow packed‐bed biofilm reactor was investigated by considering simultaneous methanogenesis and denitrification reactions under step and sinusoidal variations of feed concentration and temperature. For simultaneous step inputs of 20 mg dm −3 of NO 3 − —N and 60 mg dm −3 of methanol, the proposed model shows that major conversion of both the substrates takes place in the first half of the reactor. However, when the inlet concentration of methanol is subjected to sinusoidal variation, while that of NO 3 − —N is maintained stepwise, the exit concentration of both methanol and NO 3 − —N follow a sinusoidal response. On the other hand, when the inputs are reversed (methanol stepwise and NO 3 − —N sinusoidal), the response exhibits similar behaviour. For sinusoidal variation of feed temperature the exit concentration profiles of both substrates also follow a sinusoidal pattern. For methanol, the mean steady state conversion under sinusoidal variation is higher than the corresponding steady state concentration when feed temperature is constant at 30°C. The model predictions are in good agreement with the experimental data available in the literature. ©1997 SCI