BIOLOGICAL OXYGEN DEMAND BOD Jonathan BetzZall Highline Community

BIOLOGICAL OXYGEN DEMAND (BOD) Jonathan Betz-Zall Highline Community College May, 2010

Definition � The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as that polluted by sewage. It is used as a measure of the degree of water pollution. Also called biochemical oxygen demand. Source: The American Heritage® Dictionary of the English Language

Causes http: //lab. visual-logic. com/wp-content/uploads/2010/02/sources-of-pollution. png

Excess Phosphorus http: //gis. lrs. uoguelph. ca/Agri. Env. Archives/pics/nutr 2. gif

Another source: http: //www. scn. org/savelake/NL. Fall. 2004_files/Carwash. jpg

Algal Bloom http: //whoooaaa. wikispaces. com/file/view/algae-bloom. jpg/103935303/algae-bloom. jpg

Aerobic Bacteria http: //biologicsystemsusa. com/reports/figure_2. gif

Untreated domestic sewage BOD ~350 ppm http: //www. worstpolluted. org/projects_reports/display/63

Waste water from breweries BOD~550 ppm http: //picasaweb. google. com/lh/photo/l 7 c. Aqs. U_k 5 yku. RRZ 8 mizqg

Waste water from petroleum refineries BOD~850 ppm http: //www. environmentalleverage. com/images/lagoons/refinery%20 lagoon. J PG

Abattoir wastes BOD~2, 600 ppm http: //www. fao. org/docrep/006/y 5098 e 0 x. jpg

Pulpmill wastes BOD~25, 000 ppm http: //limjunying. wordpress. com/tag/recyclin g/

BOD Across the World

Sewage System http: //www. usj 23. com/planet_free/sewage_system/Sewage%20 System. jpg

Greywater System http: //www. dwc-water. com/technologies/grey-water-recycling/index. html

Our Area: http: //your. kingcounty. gov/dnrp/measures/images/indicators/aquatic-environment/map-AA 13 sc_marine. WQ. gif

Google Earth Image