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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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Question

Continuous Filtration Involving a Recycle Stream The fresh feed F to the process is 10,000 lb/hr of a 40 wt % aqueous biomass in suspension. The fresh feed is combined with the recycled filtrate from the filter and fed to the evaporator, where water is removed to produce a 50 wt % Bio solution, which is fed to the filter. The filter produces a filter cake that is composed of 95 wt % dry biomass wet by a 5 wt % solution that in the lab proves to be composed of 55 wt % water with the rest dry biomass. The filtrate contains 45 wt % biomass. a. Determine the flow rate of water removed by the evaporator and the recycle rate for this process. b. Assume that the same production rate of filter cake occurs, but that the filtrate is not recycled. What would be the process feed rate of 40 wt % biomass then? Assume that the product solution from the evaporator still contains 50 wt % biomass in water.

H2O
G
95% Bio Filter
A
10,000 lb/hr
50 wt%
Cake
Crystallizer
and Filter
Evaporator
Bio
5% (a 45 wt%
Suspension of Bio)
40 wt% Bio
R
Filtrate 45 wt% Bio

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