Low concentration synthetic and municipal wastewaters were treated at HRT as short as 3 and 0.6 h respectively in an anaerobic inverse fluidized bed. Both bioreactors showed gas hold up due to the liquid downflow pattern of the prototype. The bioreactor operated at 3 h had a removal efficiency of 83%, specific activity of 4.5 kg CODremoved/kg IVS (d and the gas hold up varied from 23 to 55%. The reactor treating municipal wastewater had a removal efficiency of 44% when operating at 0.6 h, the specific activity was 4.2 kg CODremoved/kg IVS (d and no biogas was detected apparently because an important fraction was dissolved in the liquid phase. The biomass concentration was 13.8 and 1.1 kg IVS/m3 for synthetic and municipal wastewater and the SEM microphotographs showed a bacterial diversity for the first run and only cocci cells for the second run. The system does not remove suspended solids, so a polishing postreatment to improve water quality has to be implemented.
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Research Article|
February 01 2000
Anaerobic treatment of low concentration waste water in an inverse fluidized bed reactor
P. Castilla;
P. Castilla
1Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55–535, México, D.F. 09340 Mexico
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M. Meraz;
M. Meraz
1Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55–535, México, D.F. 09340 Mexico
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O. Monroy;
O. Monroy
1Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55–535, México, D.F. 09340 Mexico
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A. Noyola
A. Noyola
1Department of Biotechnology, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55–535, México, D.F. 09340 Mexico
*Department of Environmental Engineering, Universidad Nacional Autónoma de México, Coyoacan, DF04510 Mexico
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Water Sci Technol (2000) 41 (4-5): 245–251.
Citation
P. Castilla, M. Meraz, O. Monroy, A. Noyola; Anaerobic treatment of low concentration waste water in an inverse fluidized bed reactor. Water Sci Technol 1 February 2000; 41 (4-5): 245–251. doi: https://doi.org/10.2166/wst.2000.0452
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