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, DOI https://doi.org/10.1016/j.biortech.2009.11.068.
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
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| Funders: | UNSPECIFIED |
| Additional Information: | Cited By (since 1996):7 Export Date: 21 April 2013 Source: Scopus CODEN: BIRTE :doi 10.1016/j.biortech.2009.11.068 Language of Original Document: English Correspondence Address: Aroua, M.K.; Faculty of Engineering, Department of Chemical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: mkaroua@um.edu.my References: Abeling, U., Seyfried, C.F., Anaerobic-aerobic treatment of high-strength ammonium wastewater-nitrogen removal via nitrite (1992) Water Sci. Technol., 26 (5-6), pp. 1007-1015; Adams, W., (2006) Handbook for Experimenters version 7.3, , Stat-Ease Inc., Minneapolis, MN, USA; Dhamole, P.B., Nair, R.R., D'Souza, S.F., Lele, S.S., Denitrification of high strength nitrate waste (2007) Bioresour. Technol., 98 (2), pp. 247-252; Foglar, L., Briski, F., Sipos, L., Vukovi, M., High nitrate removal from synthetic wastewater with the mixed bacterial culture (2005) Bioresour. Technol., 96 (8), pp. 879-888; Ghafari, S., Hasan, M., Aroua, M.K., Bio-electrochemical removal of nitrate from water and wastewater-A review (2008) Bioresour. Technol., 99 (10), pp. 3965-3974; Ghafari, S., Hasan, M., Aroua, M.K., Effect of carbon dioxide and bicarbonate as inorganic carbon sources on growth and adaptation of hydrogenotrophic denitrifying bacteria (2009) J. Hazard. Mater., 162 (2-3), pp. 1507-1513; Ghafari, S., Hasan, M., Aroua, M.K., Improvement of autohydrogenotrophic nitrite reduction rate through optimization of pH and bicarbonate dose in a batch experiments (2009) J. Biosci. Bioeng., 107 (3), pp. 275-280; Glass, C., (1997) Optimized denitrification of concentrated nitrate wastes under saline conditions in bench-scale sequencing batch reactors, , Ph.D. thesis, Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO, USA; Glass, C., Silverstein, J., Denitrification kinetics of high nitrate concentration water: pH effect on inhibition and nitrite accumulation (1998) Water Res, 32 (3), pp. 831-839; Kurt, M., Dunn, I.J., Bourne, J.R., Biological denitrification of drinking water using autotrophic organisms with H2 in a fluidized-bed biofilm reactor (1987) Biotechnol. Bioeng., 29 (4), pp. 493-501; Lee, K.C., Rittmann, B.E., Effects of pH and precipitation on autohydrogenotrophic denitrification using the hollow-fiber membrane-biofilm reactor (2003) Water Res, 37 (7), pp. 1551-1556; Pala, A., Blükbas�, O., Evaluation of kinetic parameters for biological CNP removal from a municipal wastewater through batch tests (2005) Process Biochem, 40 (2), pp. 629-635; Rezania, B., Cicek, N., Oleszkiewicz, J.A., Kinetics of hydrogen-dependent denitrification under varying pH and temperature conditions (2005) Biotechnol. Bioeng., 92 (7), pp. 900-906; Shrimali, M., Singh, K.P., New methods of nitrate removal from water (2001) Environ. Pollut., 112 (3), pp. 351-359; Smith, R.L., Ceazan, M.L., Brooks, M.H., Autotrophic, hydrogen-oxidizing, denitrifying bacteria in groundwater, potential agents for bioremediation of nitrate contamination (1994) Appl. Environ. Microbiol., 60 (6), pp. 1949-1955; Van Rijn, J., Tal, Y., Schreier, H.J., Denitrification in recirculating systems: Theory and applications (2006) Aquacul. Eng., 34 (3), pp. 364-376; Vasiliadou, I.A., Pavlou, S., Vayenas, D.V., A kinetic study of hydrogenotrophic denitrification (2006) Process Biochem, 41 (6), pp. 1401-1408; Wang, J-H., Baltzis, B.C., Lewandowski, G.A., Fundamental denitrification kinetic studies with Pseudomonas denitrificans (1995) Biotechnol. Bioeng., 47 (1), pp. 26-41; Watanabe, T., Motoyama, H., Kuroda, M., Denitrification and neutralization treatment by direct feeding of an acidic wastewater containing copper ion and high-strength nitrate to a bio-electrochemical reactor process (2001) Water Res, 35 (17), pp. 4102-4110 |
| Uncontrolled Keywords: | denitrification; optimization; kinetics; ph; bicarbonate; high-strength nitrate; waste-water; denitrifying bacteria; biofilm reactor; removal; nitrite. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering |
| Depositing User: | Mr Jenal S |
| Date Deposited: | 16 Jul 2013 05:08 |
| Last Modified: | 11 Dec 2013 02:46 |
| URI: | http://eprints.um.edu.my/id/eprint/7428 |
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