Application of the upflow anaerobic sludge bed (UASB) process for treatment of complex wastewaters at low temperatures

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260271004· OSTI ID:6159355

Koster, I W; Lettinga, G

The feasibility of the upflow anaerobic sludge bed (UASB) process for the treatment of potato starch wastewater at low ambient temperatures was demonstrated by operating two 5.65 l reactors at 14 degrees C and 20 degrees C, respectively. The organic space loading rates achieved in these laboratory-scale reactors were 3 kg COD/cubic m/day at 14 degrees C and 4-5 kg COD/cubic m/day at 20 degrees C. The corresponding sludge loading rates were 0.12 kg COD/kg VSS/day at 14 degrees C and 0.16-0.18 kg COD/kg VSS/day at 20 degrees C. These findings are of considerable practical importance because application of anaerobic treatment at low ambient temperatures will lead to considerable savings in energy needed for operating the process. As compared with various other anaerobic wastewater treatment processes, a granular sludge upflow process represents one of the best options developed so far. Although the overall sludge yield under psychrophilic conditions is slightly higher than under optimal mesophilic conditions, this doesn't seriously hamper the operation of the process. The extra sludge yield, due to accumulation of slowly hydrolyzing substrate ingredients, was 4.75% of the COD input at 14 degrees C and 1.22% of the COD input at 20 degrees C. 26 references.

• Research Organization: Wageningen Agricultural Univ., Netherland
• OSTI ID: 6159355
• Journal Information: Biotechnol. Bioeng.; (United States), Vol. 27:10
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BIOREACTORS
ENERGY CONSUMPTION
WASTE WATER
ANAEROBIC DIGESTION
BENCH-SCALE EXPERIMENTS
CHEMICAL OXYGEN DEMAND
ENERGY CONSERVATION
FEASIBILITY STUDIES
LOADING RATE
MESOPHILIC CONDITIONS
PERFORMANCE
SLUDGES
STARCH
TEMPERATURE DEPENDENCE
WASTE PROCESSING
BIOCONVERSION
CARBOHYDRATES
DIGESTION
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
PROCESSING
REAGENTS
SACCHARIDES
WASTE MANAGEMENT
WASTES
WATER
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