Life Cycle Cost for Multiple-Effect Water Stills

Life Cycle Cost for Multiple-Effect Water Stills

04/19/2018, 10:30 AM - 11:15 AM

INTERPHEX Innovation Stage

The importance of managing operating costs and minimizing consumption of utilities becomes more and more important as the importance of saving natural resources increases. Most users prefer producing hot WFI even though cold production methods with possibly lower operating costs are allowed. Selection of the water purification method depends on many different factors and they are not discussed in this presentation- focus will be on multiple-effect distillation. Often the operating costs of the equipment are considered less important than investment costs though the utility costs are significant during the life cycle of the equipment. Utilities needed in a multiple-effect water still are plant steam, feed water, cooling water, electricity and compressed air. Of these, consumption of electricity and compressed air is low and finding savings there is less significant. Instead, plant steam, feed water and cooling water costs can get high and there are ways of decreasing them. Compared to the traditional single-effect distillation, operating costs of multiple-effect water stills have decreased dramatically but they have not reached the optimal level yet. There are several ways to decrease the operating costs further. These methods and their effect on the operating costs during the equipment life cycle will be discussed in this presentation. Sample calculations of the costs will also be presented.


  • Mika Parkka


    Product Manager

    STERIS Finn-Aqua

    MIKA PÄRKKÄ Product Manager (M.Sc. (Tech.), Lic.Sc. (Tech.)) Mika Pärkkä is Product Manager of Pure Water and Steam Applications for STERIS...

Type of Session

  1. Type of Session

Learning Objectives

  1. Learning Objectives 1. To help the audience understand how to reduce consumption of utilities of a multiple-effect water still. 2. To show the audience the cost savings obtained during the life cycle of the equipment if the utility costs are reduced. 3. To show the audience how low daily costs accumulate during long periods of time.


  1. Track
    Optimizing Facilities through Innovation & Technologies

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