indicator organisms in wastewater treatment wetlands l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Indicator Organisms in Wastewater Treatment Wetlands PowerPoint Presentation
Download Presentation
Indicator Organisms in Wastewater Treatment Wetlands

Loading in 2 Seconds...

play fullscreen
1 / 7

Indicator Organisms in Wastewater Treatment Wetlands - PowerPoint PPT Presentation


  • 187 Views
  • Uploaded on

Indicator Organisms in Wastewater Treatment Wetlands. Jepson Sutton SWES 574 10-31-02. Indicator Organisms. The detection of pathogenic organisms is a time-consuming, labor-intensive task, requiring highly trained technicians

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Indicator Organisms in Wastewater Treatment Wetlands' - cyma


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
indicator organisms
Indicator Organisms
  • The detection of pathogenic organisms is a time-consuming, labor-intensive task, requiring highly trained technicians
  • For this reason, scientist have identified certain organisms that, when detected, are a definitive indication of fecal contamination.
indicator organisms3
Indicator Organisms
  • Indicator organisms are considered normal flora (always present) in the digestive system of all warm-blooded animals, including humans.
  • The detection of indicator organisms suggests that enteric pathogenic microorganisms may also be present due to the fecal contamination.
characteristics of an effective indicator
Characteristics of an effective Indicator
  • It is normal flora of warm-blooded animals
  • It is present when pathogens are present, and undetected in uncontaminated samples
  • The indicator should be found in greater concentrations than pathogens.
  • It should have a similar resistance to environmental stress and water treatment processes as the pathogen.
characteristics of an effective indicator5
Characteristics of an effective Indicator
  • It must require a host for replication. (eliminates replication in the environment)
  • Rapid, easy, and inexpensive detection methods
  • Nonpathogenic
types of indicator organisms
Types of indicator organisms
  • Total coliforms
    • First group of indicators developed
    • Problematic because of the ability of some species to replicate in the environment
  • Fecal coliforms
    • Subgroup of Total coliforms
    • Restricted to fecal origins
  • Fecal Streptococci
    • Primarily an indication of animal fecal pollution
    • FC/FS ratio
types of indicator organisms7
Types of indicator organisms
  • Anaerobic bacteria
    • Clostridium: spore forming bacteria / environmental resistance
    • Bacteroides: limited environmental resistance
  • Bacteriophage
    • Viruses that require certain bacterial hosts for replication
    • Indication of both bacterial and viral contamination.