Problem 2 You need to design to filter for a 10,000-gallon fermenter that will be aerated...

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Problem 2 You need to design to filter for a 10,000-gallon fermenter that will be aerated at a rate of 535 ft³ /min (20°C, 1 atm). The bacterial count in the air is 80 per ft. Average size of the bacteria is 1 um with density of 1.08 g/cm³. You are going to use glass fibers (D = 15 µm) with packing density a = 0.03. The cross-sectional area of the filter will be designed to give a superficial air velocity u, of 5 ft/s. a. What depth of the filter would you recommended to prevent contamination? b. How is the answer in (a) changed if u, is decreased to 1 ft/s ? Explain the results. Problem 2 You need to design to filter for a 10,000-gallon fermenter that will be aerated at a rate of 535 ft³ /min (20°C, 1 atm). The bacterial count in the air is 80 per ft. Average size of the bacteria is 1 um with density of 1.08 g/cm³. You are going to use glass fibers (D = 15 µm) with packing density a = 0.03. The cross-sectional area of the filter will be designed to give a superficial air velocity u, of 5 ft/s. a. What depth of the filter would you recommended to prevent contamination? b. How is the answer in (a) changed if u, is decreased to 1 ft/s ? Explain the results.

Answer rating: 100% (QA)

aanswer To calculate the recommended depth of the filter we need to determine the number of particles that will be captured by the filter This can be ... View the full answer