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A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose

In this study the kinetics of autohydrogenotrophic denitrification was studied under optimum solution pH and bicarbonate concentration. The optimal pH and bicarbonate concentration were firstly obtained using a design of experiment (DOE) methodology. For this purpose a total of 11 experiments were c...

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Main Authors:	Ghafari, S., Hasan, M., Aroua, M.K.
Format:	Article
Published:	Bioresource Technology 2010
Subjects:	TA Engineering (General). Civil engineering (General) TP Chemical technology
Online Access:	http://eprints.um.edu.my/7428/ http://www.sciencedirect.com/science/article/pii/S0960852409015739
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spelling	my.um.eprints.74282013-12-11T02:46:00Z http://eprints.um.edu.my/7428/ A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose Ghafari, S. Hasan, M. Aroua, M.K. TA Engineering (General). Civil engineering (General) TP Chemical technology In this study the kinetics of autohydrogenotrophic denitrification was studied under optimum solution pH and bicarbonate concentration. The optimal pH and bicarbonate concentration were firstly obtained using a design of experiment (DOE) methodology. For this purpose a total of 11 experiments were carried out. Sodium bicarbonate concentrations ranging of 20-2000 mg/L and pH values from 6.5 to 8.5 were used in the optimization runs. It was found that the pH has a more pronounced effect on the denitrification process as compared to the bicarbonate dose. The developed quadratic model predicted the optimum conditions at pH 8 and 1100 mg NaHCO 3/L. Using these optimal conditions, the kinetics of denitrification for nitrate and nitrite degradation were investigated in separate experiments. Both processes were found to follow a zero order kinetic model. The ultimate specific degradation rates for nitrate and nitrite remediation were 29.60 mg NO - 3-N/g MLVSS/L and 34.85 mg NO - 3-N/g ]MLVSS/L respectively, when hydrogen was supplied every 0.5 h. Bioresource Technology 2010 Article PeerReviewed Ghafari, S. and Hasan, M. and Aroua, M.K. (2010) A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose. Bioresource Technology, 101 (7). pp. 2236-2242. ISSN 0960-8524 http://www.sciencedirect.com/science/article/pii/S0960852409015739 DOI 10.1016/j.biortech.2009.11.068
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TA Engineering (General). Civil engineering (General) TP Chemical technology
spellingShingle	TA Engineering (General). Civil engineering (General) TP Chemical technology Ghafari, S. Hasan, M. Aroua, M.K. A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
description	In this study the kinetics of autohydrogenotrophic denitrification was studied under optimum solution pH and bicarbonate concentration. The optimal pH and bicarbonate concentration were firstly obtained using a design of experiment (DOE) methodology. For this purpose a total of 11 experiments were carried out. Sodium bicarbonate concentrations ranging of 20-2000 mg/L and pH values from 6.5 to 8.5 were used in the optimization runs. It was found that the pH has a more pronounced effect on the denitrification process as compared to the bicarbonate dose. The developed quadratic model predicted the optimum conditions at pH 8 and 1100 mg NaHCO 3/L. Using these optimal conditions, the kinetics of denitrification for nitrate and nitrite degradation were investigated in separate experiments. Both processes were found to follow a zero order kinetic model. The ultimate specific degradation rates for nitrate and nitrite remediation were 29.60 mg NO - 3-N/g MLVSS/L and 34.85 mg NO - 3-N/g ]MLVSS/L respectively, when hydrogen was supplied every 0.5 h.
format	Article
author	Ghafari, S. Hasan, M. Aroua, M.K.
author_facet	Ghafari, S. Hasan, M. Aroua, M.K.
author_sort	Ghafari, S.
title	A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
title_short	A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
title_full	A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
title_fullStr	A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
title_full_unstemmed	A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose
title_sort	kinetic study of autohydrogenotrophic denitrification at the optimum ph and sodium bicarbonate dose
publisher	Bioresource Technology
publishDate	2010
url	http://eprints.um.edu.my/7428/ http://www.sciencedirect.com/science/article/pii/S0960852409015739
_version_	1643688040193851392
score	13.211869

A kinetic study of autohydrogenotrophic denitrification at the optimum pH and sodium bicarbonate dose

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