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Green Engineering: Environmentally Conscious Design of Chemical Processes by David R. Shonnard, David T. Allen

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Chapter 9Unit Operations and Pollution Prevention

by David R. Shonnard

9.1 Introduction

In developing a flowsheet for the production of a chemical, it is desirable to consider the environmental ramifications of each unit operation in the process rather than postponing this consideration until the flowsheet is finished. This “front end” environmental assessment is more likely to result in a chemical process that has less potential to cause environmental harm. In many instances, this environmentally benign design will also be more profitable, because the improved design will require lower waste treatment and environmental compliance costs and will convert a higher percentage of raw materials into salable product.

In considering pollution prevention ...

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