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Schematic diagram of upflow anaerobic sludge blanket (UASB) reactor used in the study. Legend: 1—Influent; 2—Stirrer; 3—open and close Valve; 4—Peristaltic pump; 5—Water bath; 6—Heating element; 7—PVC column reactor; 8—Biogas outlet; 9—Tedlar bag; 10—Thermometer; 11—Effluent outlet; 12—Collection tank.
