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Modeling of simultaneous denitrification – Anaerobic digestion – Organic matter aerobic oxidation and nitrification in an anoxic–anaerobic–aerobic compact filter reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
23859 43478 2012 13 PDF Available
Title
Modeling of simultaneous denitrification – Anaerobic digestion – Organic matter aerobic oxidation and nitrification in an anoxic–anaerobic–aerobic compact filter reactor
Abstract

A mathematical model was developed for a compact anoxic–anaerobic–aerobic filter reactor with liquid recirculation for the treatment of fishing effluents. The model includes denitrification, anaerobic digestion, aerobic carbon oxidation and nitrification steps, as well as an evaluation of the liquid gas mass transfer and pH. The model was calibrated using one experimental condition at a recycling ratio (R) = 10, and was validated with R equal to 2 and 0, with an organic concentration of 554 ± 24 mg TOC L−1, salinity of 24 g L−1 and hydraulic retention time (HRT) of 2 d. Carbon total removal is higher than 98%, while maximum nitrogen removal is 62% using total nitrification in the aerobic zone, due to a higher quantity of NOx produced which were recirculated to the anoxic zone. In the aerobic zone, simultaneous nitrification and denitrification processes occur, because the diffusion limitations cause a low oxygen penetration in the biofilm. In the anoxic–anaerobic zone, denitrification or methanogenesis inhibition by DO (caused by the recycled oxygen) is not observed.

► We model a compact anoxic–anaerobic–aerobic filter reactor with liquid recirculation for the treatment of fishing effluents. ► We include inorganic carbon concentration and pH predictions. ► We study DO concentration effect on the organic matter and nitrogen removal efficiencies. ► Carbon global removal is higher than 98% for all oxygen concentrations in aerobic zone. ► Maximum nitrogen removal is 62% using total nitrification.

Keywords
Modeling; Biofilm simulation; Anoxic-anaerobic-aerobic filter reactor; Denitrification-anaerobic digestion-nitrification-organic matter aerobic oxidation
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Modeling of simultaneous denitrification – Anaerobic digestion – Organic matter aerobic oxidation and nitrification in an anoxic–anaerobic–aerobic compact filter reactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 160, Issues 3–4, 31 August 2012, Pages 176–188
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us