rcent, suspended solids concentration in digested sludge fed to the centrifuge = 5.0 percent by weight, centrifuge cake solids concentration = 30 percent by weight, centrifuge solids capture = 90 percent. Sketch a process flow schematic of the
A centrifuge dewaters digested sludge from an
anaerobic digester. Pertinent performance data are; raw sludge feed rate to the anaerobic
digester = 60,000 lb/day on a dry solids basis, digester suspended solids removal
efficiency = 55 percent, suspended solids concentration in digested sludge fed to the
centrifuge = 5.0 percent by weight, centrifuge cake solids concentration = 30 percent by
weight, centrifuge solids capture = 90 percent.
Sketch a process flow schematic of the system showing both the digester and
centrifuge and all flowing fluid streams, clearly identify the appropriate control surface(s)
for mass balance analyses, and then determine;
(i) dewatered sludge mass flow rate (lb/day)
(ii) centrate flow rate (gal/day)
(iii) centrate suspended solids concentration (mg/l).
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