1 / 36

Environmental Microbiology

Environmental Microbiology. Key points:. Microbes give us access to nutrients Nitrogen fixation. Microbes rarely live alone Biofilms. Some microbes can do some far out chemistry Mining bacteria. Nature of ecosystems. Energy flow. 3. Rule of 10. Microbes Recycle Key Elements.

ghaywood
Download Presentation

Environmental Microbiology

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Environmental Microbiology

  2. Key points: Microbes give us access to nutrients Nitrogen fixation Microbes rarely live alone Biofilms Some microbes can do some far out chemistry Mining bacteria

  3. Nature of ecosystems Energy flow 3

  4. Rule of 10

  5. Microbes Recycle Key Elements

  6. Biogeochemical Cycles — Water 6

  7. Biogeochemical Cycles — Carbon 7

  8. Biogeochemical Cycles — Nitrogen 8

  9. Nitrogen Fixing Bacteria Nitrifying Bacteria(Nitrosomonas, Nitrosococcus, Nitrobacter, Nitrococcus) NH4+ --> NO3- Denitrifying Bacteria include Thiobacillus denitrificans, Micrococcus denitrificans Paraoccus denitrificans and Pseudomonas NO3 --> N2 9

  10. Nitrogen fixation Nodules N2 + 6 H+ 6 e- --> 2 NH3 Reaction is oxygen sensitive Cyanobacteria Azotobacteraceae Rhizobia (Rhizobium meliloti) Bradyrhizobia Frankia

  11. Sulfur Cycles Sulfate Reduction SO4-2 --> SO3-2-->S Sulfur Reduction S -->H2S Sulfur Oxidation S -> SO4-2 Desulfobacterales Desulfovibrionales Syntrophobacterales Desulfuromonas, Proteus Beggiatoa, Paracoccus 11

  12. Sulfur Cycles 12

  13. Phosphorous cycle 13

  14. Air as an Environment Determining Microbial Counts Controlling Microbial counts 14

  15. Soil as an Environment Components Microbes 15

  16. Microbes Are Everywhere! In the soil

  17. Soil Influential Factors Soil Pathogens 17

  18. Water as an Environment Freshwater 18

  19. Microbes Live Together In biofilms in pipes

  20. Biofilms Your shower …………. Dental plaque …………. almost any moist surface …………... There are five stages of biofilm development . initial attachment irreversible attachment maturation I maturation II dispersion

  21. More biofilms Catheter Staph aureus biofilm

  22. Water Environments Marine 22

  23. Deep Ocean Vents 23

  24. Water Purification Procedures 24

  25. Coliform Tests Membrane Test MUG Test 25

  26. We Use Existing Microbes To treat sewage

  27. Sewage Treatment 27

  28. Sewage Treatment Plant

  29. Other Microbial Treatments Septic Tanks 29

  30. We Use Existing Microbes To clean up oil spills

  31. We Use Existing Microbes To leach ores

  32. Thiobacillus ferrooxidans A tiny rod-shaped bacterium known as Thiobacillus ferrooxidans gets energy by oxidizing some inorganic materials such as sulfide-containing minerals. As the bacteria metabolize, they release acid and an oxidizing solution of ferric ions, which can wash metals right out of ore. The copper and gold industry quickly and enthusiastically put this discovery to work.

  33. We Modify Microbes To protect plants from pests Bacillus thuringensis Delta endotoxin protein

  34. We Modify Microbes To clean up toxic waste = bioremediation TNT, plastics PCBs

  35. Bioremediation 36

More Related