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Treatment of Food Industry Waste by Bench‐Scale Upflow Anaerobic Sludge Blanket‐Anoxic‐Aerobic System
An upflow anaerobic sludge blanket (UASB)‐anoxic‐aerobic system was used for treatment of tomato and bean processing wastewater. At various hydraulic retention times, ranging from 0.7 to 5 days, excellent removal of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total suspended solids (TSS), ammonia‐nitrogen (NH4‐N), and total Kjeldahl nitrogen was achieved with final effluent BOD/TSS/NH4‐N concentrations of less than 15/15/1 mg/L. Biogas yield in the UASB reactor varied from 0.33 to 0.44 m3/kgCODremoved. The kinetics of anaerobic treatment were investigated. The yield coefficient was 0.03 gVSS/gCOD; maximum specific growth rate was 0.24 day−1; Monod half velocity constant was 135 mgCOD/L; and specific substrate utilization rate was 3.25 gCOD/gVSS · d. Nitrification and denitrification kinetics were studied in batch experiments, and the rates were comparable with those in the continuous flow system.
Treatment of Food Industry Waste by Bench‐Scale Upflow Anaerobic Sludge Blanket‐Anoxic‐Aerobic System
An upflow anaerobic sludge blanket (UASB)‐anoxic‐aerobic system was used for treatment of tomato and bean processing wastewater. At various hydraulic retention times, ranging from 0.7 to 5 days, excellent removal of chemical oxygen demand (COD), biochemical oxygen demand (BOD), total suspended solids (TSS), ammonia‐nitrogen (NH4‐N), and total Kjeldahl nitrogen was achieved with final effluent BOD/TSS/NH4‐N concentrations of less than 15/15/1 mg/L. Biogas yield in the UASB reactor varied from 0.33 to 0.44 m3/kgCODremoved. The kinetics of anaerobic treatment were investigated. The yield coefficient was 0.03 gVSS/gCOD; maximum specific growth rate was 0.24 day−1; Monod half velocity constant was 135 mgCOD/L; and specific substrate utilization rate was 3.25 gCOD/gVSS · d. Nitrification and denitrification kinetics were studied in batch experiments, and the rates were comparable with those in the continuous flow system.
Treatment of Food Industry Waste by Bench‐Scale Upflow Anaerobic Sludge Blanket‐Anoxic‐Aerobic System
Gohil, Alpesh (author) / Nakhla, George (author)
Water Environment Research ; 78 ; 974-985
2006-09-01
12 pages
Article (Journal)
Electronic Resource
English
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