Biomass retention and performance of anaerobic fixed-film reactors treating acetic acid wastewater
An acetic-acid-based synthetic wastewater of different organic concentrations was successfully treated at 35 degrees 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/cubic m at a loading rate of 17 kg COD/cubic m 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. (Refs. 19).
- Research Organization:
- Kuwait Univ., Box 5969, Kuwait. Dept. Civil Engineering; National Research Council of Canada, Div. Biological Sciences
- OSTI ID:
- 5630064
- Journal Information:
- Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 30:2; ISSN BIBIA
- Country of Publication:
- United States
- Language:
- English
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ACETIC ACID
ANAEROBIC DIGESTION
BIOCONVERSION
CARBOXYLIC ACIDS
CHEMICAL OXYGEN DEMAND
CHEMICAL REACTION KINETICS
DIGESTION
HYDROGEN COMPOUNDS
KINETICS
LIQUID WASTES
LOADING RATE
MANAGEMENT
MATERIALS
MESOPHILIC CONDITIONS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROCESSING
REACTION KINETICS
SYNTHETIC MATERIALS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER