Worksheets/Week6

Part 1

Your group is developing a new product, but have been struggling to get the product’s stability, measured in days, to the level required. You are aiming for a stability value of 50 days or more.

• A: enzyme strength: -1 == 20%; +1 == 30%
• B: feed concentration: -1 == 5%; +1 == 15%
• C: mixer type: -1 = R mixer; +1 = W mixer

Part 2

Data from a bioreactor experiment is available, were we were investigating four factors:

• A = feed rate 5 g/min or 8 g/min
• B = initial inoculant size 300 g or 400 g
• C = feed substrate concentration 40 g/L or 60 g/L
• D = dissolved oxygen set-point 4 mg/L or 5 mg/L

The 16 experiments from a full factorial, 24, were randomly run, and the yields, y, the outcome variable were given in standard order: [60, 59, 63, 61, 69, 61, 94, 93, 56, 63, 70, 65, 44, 45, 78, 77]