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Biomass retention and performance of anaerobic fixed-film reactors treating acetic acid wastewater

✍ Scribed by M. F. Hamoda; K. J. Kennedy

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
872 KB
Volume
30
Category
Article
ISSN
0006-3592

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✦ Synopsis

An acetic-acid-based synthetic wastewater of different organic concentrations was successfully treated at 35Β°C in anaerobic downflow fixed-film reactors operated at high organic loading rates and short hydraulic retention times (HRTs). Substrate removal and methane production rates close to theoretical values of complete volumetric chemical oxygen demand (COD) removal and maximum methane conversion were obtained. A high concentration of biofilm biomass was retained in the reactor. Steady-state biofilm concentration increased with increased organic loading rate and decreased HRTs, reaching a maximum of 8.3 kg VFS/m3 at a loading rate of 17 kg COD/m3 day. Biofilm substrate utilization rates of up to 1.6 kg COD/kg VFS day were achieved. Soluble COD utilization rates at various COD concentrations can be described by half-order reaction kinetics.

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