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Passive Screen Intakes: Design, Construction, Operation, and Environmental Impacts

  • Thomas M. MissimerEmail author
  • Timothy W. Hogan
  • Thomas Pankratz
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Passive screen intake systems provide a higher degree of reduction in impingement and entrainment compared to open-ocean intake structures, such as channel and velocity cap intake systems. The system consists of a wedgewire screen structure with a conveyance pipeline to the plant facility and a pumping station. Commonly, the screen structure contains a semi-automated cleaning system that uses bursts of compressed air. Passive screen intake systems exclude a large part of the marine biota by using a relatively small screen aperture and a low inflow velocity. Screen slot aperture is commonly less than 3 mm and depends on environmental regulations pertaining to the specific site location. The range in design intake velocities through the screen ranges from 10 to 15 cm/s, again depending on local regulations. The current motion across the screen structure also sweeps small organisms off the screen and helps exclude them from entrainment into the inflowing water. The degree of environmental impact on entrainment of ichthyoplankton is greatly dependent on the design of the passive intake system and the current velocity. Some environmental impacts occur when constructing the connecting pipeline across or beneath the seabed and surface zone of the shoreline. Passive screen intake systems can provide a high-capacity SWRO plant with the required feed water. However, when the passive screens are located offshore, there is some complexity in the maintenance of the screens that can limit use of the technology.

Keywords

Duplex Stainless Steel Intake System Head Loss Intake Structure HDPE Pipe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Thomas M. Missimer
    • 1
    Email author
  • Timothy W. Hogan
    • 2
  • Thomas Pankratz
    • 3
  1. 1.U.A. Whitaker College of EngineeringFlorida Gulf Coast UniversityFort MyersUSA
  2. 2.Alden Research LaboratoryHoldenMassachusetts
  3. 3.Water Desalination ReportHoustonUSA

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