Consider a single$-$stage, well$-$mixed flocculator with G $=55$ s$1.$ The flocculator volume is $900$ m$3$ and the water flow rate is $9$ m$3/$min$.$ Estimate$/$calculate the number concentration of particles exiting the flocculator. For this problem, assume that the bacteria are the only solids present and that macroscale flocculation is the dominant flocculation mechanism for this suspension. Hint: you can estimate the floc volume fraction, $,$ based on the information given.