(Solved): You want to build a laboratory-scale UASB reactor. An anaerobic granular sludge from a full-scale ...

You want to build a laboratory-scale UASB reactor. An anaerobic granular sludge from a full-scale wastewater treatment plant will be used as inoculum. This UASB reactor will work with industrial wastewater. The results of the methanogenic activity test (Figure 1) of the sludge to be inoculated are shown in table 1. TIME (H) 0.00 2.50 14,70 15.10 15.50 16.05 16.40 16.90 17.30 17.80 18.20 18.50 19.00 19.30 19.70 19.90 20.40 20.70 21.00 23.15 23.70 24.10 24.60 38.80 40.60 43.70 44.60 VCH4 (ML) 0 10 65 70 75 83 88 95 102 108 114 120 128 133 140 144 152 157 162 202 212 218 226 317 319 322 324 Digestor: Volumen 500 mL Lodo = 5 gSV/L en el digestor Linea de biogás Digestor Agitador Tubo trampa FIGURA 1 Frasco de Mariotte Probeta ADDITIONAL DATA: Temperature = 30 °C, Pressure = 1 atm. Total mud solids = 180 g/L, of which 30% are volatile solids (VS). The wastewater flow to be treated by the UASB reactor is 8 L/d and its COD is 5000 mg/L. The initial concentration of the sludge in the UASB reactor will be 25 g SV/L. a) Determine the methanogenic activity of the sludge in gCOD/gSV.d b) Calculate the volume of the laboratory UASB reactor c) Calculate the volume of sludge that has to be introduced as inoculum to the UASB reactor to obtain the desired initial sludge concentration. d) Calculate the hydraulic retention time in the UASB reactor.