Environmental Microbiology

Environmental Microbiology - Environmental Microbiology...

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-The study of the function and diversity of microorganisms in their natural environments. Includes microbial ecology, microbially- mediated nutrient cycling, geomicrobiology, microbial diversity and bioremediation. Environmental Microbiology
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Goal: Reduce the BIOCHEMICAL OXYGEN DEMAND (BOD) Wastewater Treatment = the amount of O 2 needed for decomposition of organic matter in a sample. -BOD of raw sewage is approximately 300- 400 mg/L of sewage; natural water is 5-10 mg/L. BOD is proportional to amount of degradable organic material.
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Large scale wastewater treatment plants in U.S. use a two series process: Primary treatment Secondary treatment Solid portion-- sludge --is further treated in anaerobic digester Once treated liquid portion-- effluent --is discharged into some body of water
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Physical process removes nearly 50% of solids and 25% of BOD. Sewage settles in sedimentation tank. Sludge is removed after settling.
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Environmental Microbiology - Environmental Microbiology...

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