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Microfiltration For CPI Wastewater

By Brad Buecker, Kansas City Power & Light Co. |

    Pure water is an essential ingredient in the manufacture of a vast amount of products in the U.S. and, of course, throughout the world. In the industry for which I work, electricity generation, high-purity water is an absolute must for feeding high-pressure steam generators. But of course, steam generation is also important in the petroleum-refining and petrochemical industries, pharmaceutical plants, the steel and non-ferrous metals industries, and so on. Furthermore, high-purity water for other processes — computer-processor and circuit-board manufacturing come quickly to mind — is also an absolute necessity. And, let’s not forget the blossoming biofuels industry. As has been reported in this magazine and elsewhere, the techniques of microfiltration (MF) and ultrafiltration (UF) are gaining popularity as pretreatment methods for industrial makeup-water production. This article outlines fundamental principles of these technologies, and why they are replacing previous technologies. It also discusses lessons I have learned from direct experience with a microfiltration system.   Filtration issues As a precursor to microfiltration review, consider filtration from both sides (particle-size wise) of…
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