References of "Jupsin, Hugues"
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See detailA process to reduce the cost of leachates treatment
Jupsin, Hugues ULiege; Cambroisier, C.; Zouhir, Fouad ULiege et al

Conference (2013, October 02)

The cost of leachate treatment can be reduced by an appropriate selection of the unit operations needed. Moreover in some cases other liquid residues (waste) can be used as reactants to reduce the ... [more ▼]

The cost of leachate treatment can be reduced by an appropriate selection of the unit operations needed. Moreover in some cases other liquid residues (waste) can be used as reactants to reduce the operating costs. The biological part of the system is based on a SBR process whose operating parameters are fitted on data collected on site. A sophisticated control scheme depending on the specific characteristics of the leachates is used to optimize the treatment [less ▲]

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See detailModeling of partial nitrification and denitrification in an SBR for leachate treatment without carbon addition
Hoang, V. Y.; Jupsin, Hugues ULiege; Le, V. C. et al

in Journal of Material Cycles and Waste Management (2012), 14(1), 3-13

A process of partial nitrification and denitrification in a sequencing batch reactor (SBR) treating leachate was simulated by applying a modified version of activated sludge model no. 3 (ASM3), named ASM3 ... [more ▼]

A process of partial nitrification and denitrification in a sequencing batch reactor (SBR) treating leachate was simulated by applying a modified version of activated sludge model no. 3 (ASM3), named ASM3_2step. This model modifies the ASM3 model by separating nitrification and denitrification into two steps with nitrite as an intermediate substrate. Three periods, including long term period, steady state and cycle evolution, were used for calibration. Three main processes were observed, including biomass production, nitrification (focusing on nitrite accumulation) and denitrification. The kinetic and stoichiometric parameters (μA\_NH, YA\_NH, YA_NO2, YH_O2, b A, KA\_NH), were determined from biokinetic and respirometry tests. Some of the default values of kinetic and stoichiometric parameters available in the ASM3 model and in the literature were kept constant, while some others were adjusted step by step until observed state variables fit with experimental data. The maximum specific growth rate of nitrite oxidizing bacteria (0.108 day−1) (simulated by the model) and that of ammonium oxidizing bacteria (0.61 day−1) (from biokinetic tests) are the parameters which have the highest influence on the nitrite accumulation, even more than oxygen supply intensity or Kla value. Other important parameters were KAO\_NH and KAO_NO2, calibrated at the values of 1.37 and 1.59 mg O2/L, respectively. The modified model and values of the kinetic and stoichiometric parameters obtained from the modeling process will be used for optimization of the partial nitrification in the next study [less ▲]

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See detailMODELLING OF BACTERIAL SULPHATE REDUCTION IN ANAEROBIC PONDS : KINETIC INVESTIGATIONS
Harerimana, Casimir ULiege; Vasel, Jean-Luc ULiege; Jupsin, Hugues ULiege et al

in Australian Water Association (2011)

The aim of the study was first to develop a simple and practical model of anaerobic digestion including sulphate-reduction in anaerobic ponds. The basic microbiology of our model consists of three steps ... [more ▼]

The aim of the study was first to develop a simple and practical model of anaerobic digestion including sulphate-reduction in anaerobic ponds. The basic microbiology of our model consists of three steps, namely, acidogenesis, methanogenesis, and sulphate reduction. This model includes multiple reaction stoichiometry and substrate utilization kinetics. The second aim was to determine some kinetic parameters associated with this model. The values of these parameters for sulfidogenic bacteria are used in the anaerobic pond model to describe the sulphate reduction processes and to evaluate the risk of odour generation. [less ▲]

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See detailDevelopment of a SBR bench-scale to optimize the partial nitrification process in landfill laechate treatment and its possible application in Vietnam.
Hoang, Viet Yen ULiege; Jupsin, Hugues ULiege; Le, V. C. et al

Conference (2008, October)

Landfill leachate treatment is a major issue in many developing countries including Vietnam. Leachates are characterised by very high nitrogen concentrations, especially ammonium, needing an appropriate ... [more ▼]

Landfill leachate treatment is a major issue in many developing countries including Vietnam. Leachates are characterised by very high nitrogen concentrations, especially ammonium, needing an appropriate treatment technology. Conventional treatment technology has some drawbacks: mostly its high costs and problems to meet discharged standards requirements. This study applies a more recent approach for nitrogen removal, which is known as partial nitrification, by using a sequencing batch reactor (Bernet et al., 2005) technique. For the first step, the experiments were done with Belgian leachates. Based on mathematical models derived from generally accepted ASM Model, specific growth rates of biomass (μ(T)) found is 0.48 (d-1), 0.39 (d-1), 1.56 (d-1) and 0.82 (d-1) for ammonium nitrifiers, nitrite nitrifiers, nitrite denitrifiers and nitrate denitrifiers respectively. Concentration of the active part of these four kinds of bacteria is estimated of 22.3 mg/L, 12.4 mg/L, 464 mg/L and 12.3 mg/L. Maintaining dissolved Oxygen concentrations in the range 0.8 to 2.1 mgO2/L, with typical value around 1.5 mg/L, the system yields nitrite accumulation (preliminary step of partial nitrification/denitrification). SBR cycle was changed from 4 hours/4 hours of aeration/mixing in turn to 5 hours/3 hours and then 6 hours/2 hours. The last cycle has shown the best partial nitrification capacity of the SBR (a nitrite accumulation of 89 %) but not yet yielding a 50/50 ratio of ammonium/nitrite at the end of nitrification process. However, a well managed SHARON process will be processed in the next step of the study to obtain higher nitrogen removal efficiency and the expected ammonium/nitrite ratio. It has also been shown that free ammoniac concentration affects the nitrite/(nitrite + nitrate) ratio at the end of aeration phase. [less ▲]

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