Updates from August, 2011

• Industrial Water Treatment Filters

  admin 8:11 am on August 8, 2011 | 0 Permalink
  

  From initial screening to water softening, filters have a vast array of applications in wastewater treatment. Fortunately, Complete Water Services knows them all, and can help you employ the right filter for the job.

  We offer a wide range of filtration products, including small cartridge filters for low flow applications, bag filters and housings and large-capacity cartridge filters—as well as steel and fiberglass tank vessels—for high flow applications.

  We design systems to remove sediment, particulates, minerals, oil and many other contaminants found in water and wastewater. We also provide water softeners and ion exchange filters for dissolved contaminant removal in high purity water applications.

  Membrane technologies represent the cutting edge of filter-based purification technologies, and no one knows membranes better than Complete Water Services. Whether your requirements involve desalinization, high purity systems or putting in an increasingly popular—and increasingly inexpensive—membrane bioreactor system (MBR), our expert knowledge and wealth of experience can help you get the most bang for the buck.

  Common membrane applications include ultrafilters to remove suspended solids and oils (as well as in MBRs); nano filters, to remove suspended solids and some large-molecular-weight dissolved contaminants; and reverse osmosis, for high-purity applications, desalinization and wastewater reuse.

  Membrane systems are available for a variety of flow applications and system sizes.

  
  

   

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• Screen use in Wastewater Treatment

  admin 9:18 am on July 18, 2011 | 0 Permalink
  

  Screens are used in wastewater treatment to strain larger particles from the water stream and are usually the first components in the treatment system. The main objective of using a screen is to remove materials and large objects that could do the following:

  • Damage or blockage downstream equipment
  • Reduce the overall effectiveness and reliability of the treatment processes
  • Ultimately contaminate the final discharge waterway

  The purpose, size of the solids, specific application, and unit operations downstream contribute to determining the opening size of the screens. These factors establish whether the specific screen can effectively and economically remove the particles required.

  The design of the screen for a particular application is based on the size of materials to be removed, approach velocity, clear openings between bars or mesh size, headloss through the screens, screenings handling, processing and disposal, and system controls. The screening element may be parallel bars, rods or wires, grating, wire mesh or perforated plates. The openings may be any shape but are generally circular or rectangular slots. The screens can be mechanically cleaned or cleaned by hand. These removed materials are generally called “screenings”.

  Coarse screens are generally classified as those with openings larger than 3 millimeters (mm) to 6 mm. These types of screens include bar racks and bar screens. They are primarily classified by the type of mechanical cleaning device. Mechanically cleaned bar screens are divided into four main types: 1) chain driven, 2) reciprocating rake, 3) catenary, and 4) continuous belt. Fine screens are rated with openings less than 3 mm to 6 mm. The most common fine screens include tangential (static) screens, vibratory screens and rotary drum screens.