Anaerobic treatment of winery wastewater in fixed bed reactors |
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Authors: | Rangaraj Ganesh Rajagopal Rajinikanth Joseph V Thanikal Ramamoorty Alwar Ramanujam Michel Torrijos |
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Institution: | (1) Laboratoire de Biotechnologie de l’Environnement, INRA, UR50, Avenue des Etangs, 11100 Narbonne, France;(2) Department of Environmental Technology, Central Leather Research Institute (CLRI), Chennai, 600020, India;(3) Indian Institute of Technology, Roorkee, Uttaranchal, India;(4) Department of Civil Engineering, Kumaraguru College of Technology, Coimbatore, 641006, India |
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Abstract: | The treatment of winery wastewater in three upflow anaerobic fixed-bed reactors (S9, S30 and S40) with low density floating
supports of varying size and specific surface area was investigated. A maximum OLR of 42 g/l day with 80 ± 0.5% removal efficiency
was attained in S9, which had supports with the highest specific surface area. It was found that the efficiency of the reactors
increased with decrease in size and increase in specific surface area of the support media. Total biomass accumulation in
the reactors was also found to vary as a function of specific surface area and size of the support medium. The Stover–Kincannon
kinetic model predicted satisfactorily the performance of the reactors. The maximum removal rate constant (U
max) was 161.3, 99.0 and 77.5 g/l day and the saturation value constant (K
B) was 162.0, 99.5 and 78.0 g/l day for S9, S30 and S40, respectively. Due to their higher biomass retention potential, the
supports used in this study offer great promise as media in anaerobic fixed bed reactors. Anaerobic fixed-bed reactors with
these supports can be applied as high-rate systems for the treatment of large volumes of wastewaters typically containing
readily biodegradable organics, such as the winery wastewater. |
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