Answer the following three sub-questions by referring to Figure A on the total flux plot for the unknown suspension in a thickener of area 200 m2 handling a feed rate of 0.04 m3/s and an underflow rate of 0.025 m3/s.

(1) What is the critical feed concentration for this thickener? (2) If the feed concentration is 0.18 m3/ m3, determine the solids concentrations in the overflow (CV), underflow (CL), in the regions above and below the feed well (CB & CT). (3) If the feed concentration is 0.24 m3/ m3, determine the solids concentrations in the overflow (CV), underflow (CL), in the regions above and below the feed well (CB & CT).

3. Answer the following three sub-questions by referring to Figure A on the total flux plot for the unknown suspension in a thickener of area 200 m handling a feed rate of 0.04 m/s and an underflow rate of 0.025 m3/s. a slope of feed flux 0.040 solids flux, Ups (mm/s) _excess for (c) Continuous flux plot (downflow section) oo tatical fend feuwe feest.fr 0.03 Op 26 0.02- 0.01 - stope Batch flux plot 1 Perg 0.0 0.0 1 solids flux, Ups (mm/s) 0.02-1 0.1 Ce -9067 (6) G -18 (6) 6-14 0.2 CgED24 0.3 c) solids volume fraction, Court 31 0.01 Cy0.00 0.0 0.0 solids volume traction, 2017 0.3 0.1 Yeycauf Jo.00 mm ce) Continuous flux plot (uptiow section) x Figure A. Plot of height of clear liquid interface versus time during settling test. (1) What is the critical feed concentration for this thickener? (2) If the feed concentration is 0.18 m/m, determine the solids concentrations in the overflow (Cv), underflow (CL), in the regions above and below the feed well (Cs & CI)