Modelling of simultaneous methanogenesis and denitrification in an upflow packed-bed biofilm reactor

✍ Scribed by Muhammad Arshad S. Chaudhry; Shafkat A. Beg

• Publisher: Wiley (John Wiley & Sons)
• Year: 1997
• Tongue: English
• Weight: 469 KB
• Volume: 70
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199711)70:3<267::aid-jctb743>3.0.co;2-4

✦ Synopsis

The performance of an upÑow packed-bed bioÐlm reactor was investigated by considering simultaneous methanogenesis and denitriÐcation reactions under step and sinusoidal variations of feed concentration and temperature. For simultaneous step inputs of 20 mg dm~3 of and 60 mg dm~3 of meth-NO 3 ~wN anol, the proposed model shows that major conversion of both the substrates takes place in the Ðrst half of the reactor. However, when the inlet concentration of methanol is subjected to sinusoidal variation, while that of is main-NO 3 ~wN tained stepwise, the exit concentration of both methanol and follow a NO 3 ~wN sinusoidal response. On the other hand, when the inputs are reversed (methanol stepwise and sinusoidal), the response exhibits similar behaviour. For NO 3 ~wN sinusoidal variation of feed temperature the exit concentration proÐles 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.