By D. Leo Pyle, Peter J. Fryer, Chris D. Reilly
This publication covers many matters within the box of nutrition know-how, together with strategy layout, risk and probability research, warmth and mass move and meals rheology. every one part conscientiously explains the strategies mentioned and covers intimately lots of their very important purposes within the foodstuff undefined. Accompanying the ebook is a pc-compatible laptop diskette, containing brief programmes of use in making plans strategies. "Chemical Engineering for the meals undefined" will be an invaluable textual content for all these operating in foodstuff processing and for these educating and learning this crucial topic.
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Additional info for Chemical Engineering for the Food Industry
If the calculated values do not match with the design or assumed values (Le. in steps 5 and 7) try a new R and repeat until answers converge. 1 for two iterations. The correct result can be converged on readily using a simple algorithm. 5 involves a reaction, it is relatively simple to handle because of the simplicity of the reaction stoichiometry: one mole (or kg) of glucose gives one mole (or kg) of fructose. Thus it is easy to keep track of the flows. 5 Result: Calculated fructose product (Fe) < Design value Calculated glucose in recycle (D-P) > Assumed value :.
For example, in a typical microbial process we have C-, N-, H-, 0-, etc. sources + cells = more cells and products The usual approach taken in attempting to describe these processes is to write an overall pseudo-chemical equation. 22) Note that, while this equation does not pretend to give a mechanistic description, it must satisfy various consistency requirements, as follows. 18 INTRODUCTION TO PROCESS DESIGN Each element should balance on the left- and right-hand sides of the equation. 18 It will be seen that, to a fair degree of accuracy, the balance is achieved.
They are used for various reasons and, in particular, to conserve material and to increase process efficiency. The carbon dioxide loop in Fig. 1 is a good example; note, too, that the solvent may also recycle valuable extracted components. In a similar way, the efficiency of a continuous fermenter (as used in ethanol production, for example) can often be increased, for example by recycling cells and unconsumed nutrients. We illustrate the effects of recycling and the method of solving material balance problems with recycle in the next example.
Chemical Engineering for the Food Industry by D. Leo Pyle, Peter J. Fryer, Chris D. Reilly