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The sludge removed from the sludge zone of the settling tank is 103.68 kg/day has a solids concentration of 3%. To be able to burn the sludge in an incinerator, it must be dewatered. This is to be carried out by a gravity thickener which can achieve an underflow concentra tion of 8%, and then the sludge will be concentrated further in a vacuum filter that will re move 75% of the water from the feed stream. The density of wet sludge is approximately equal to that of water. Calculate (a) the flowrate of thickened sludge that must be handled by the vacuum filter, and (b) the composition of the filter cake produced by the vacuum filter.

The sludge removed from the sludge zone of the settling tank is 103.68 kg/day has a solids concentration of 3%. To be able to burn the sludge in an incinerator, it must be dewatered. This is to be carried out by a gravity thickener which can achieve an underflow concentra tion of 8%, and then the sludge will be concentrated further in a vacuum filter that will re move 75% of the water from the feed stream. The density of wet sludge is approximately equal to that of water. Calculate (a) the flowrate of thickened sludge that must be handled by the vacuum filter, and (b) the composition of the filter cake produced by the vacuum filter.

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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The sludge removed from the sludge zone of the settling tank is 103.68 kg/day has a solids concentration of 3%. To be able to burn the sludge in an incinerator, it must be dewatered. This is to be carried out by a gravity thickener which can achieve an underflow concentra tion of 8%, and then the sludge will be concentrated further in a vacuum filter that will re move 75% of the water from the feed stream. The density of wet sludge is approximately equal to that of water. Calculate (a) the flowrate of thickened sludge that must be handled by the vacuum filter, and (b) the composition of the filter cake produced by the vacuum filter.

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