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Q1) A rectangular ( 10m18m ) Up-flow Anaerobic Sludge Blanket (UASB) reactor is to be designed for production of biogas. Based on the following design elements: - Average up-flow velocity =0.55m/h - Volumetric hydraulic load =3.0m3/m3d. - Sludge loading rate =0.3kgCOD/kgVSd ) - Total amount of biomass in the reactor =13000kgVS - Sewage temperature: T=20C - Solids yield coefficient: Y=0.15kgTSS/kgCODapp - Solids yield coefficient, in terms of COD: Y obs =0.21kgCOD sludge /KgCODapp.. - Expected concentration of the discharge sludge: C=3.8% - Sludge density: =1,030kg/m3 Estimate the following design parameters: a) Average influent flow rate b) Total volume of the reactor c) Height of the reactor d) The hydraulic detention time e) Volumetric organic loading rate f) The COD concentrations in the final effluent g) Total amount of biogas production in (m3/d), assuming methane content of 72%