Upload
noriel-liezel-ann
View
23
Download
2
Embed Size (px)
Citation preview
Demand
Noriel Liezel Ann B. Tepase
IV-BSCT
It is the amount of oxygen, expressed in mg/L or parts per million(ppm), that bacteria take from water when they oxidize organic matter.
What
Demand?
{Corg} + O2microorganisms CO2 + H2O
Carbonaceous & nitrogenous phase
What
Demand?
S
WATER POLLUTIONen.wikipedia.org
beforeitsnews.com
METHODS
DILUTION MANOMETRIC
It is conducted by
placing various
incremental
portions of the
sample into bottles
and filling the bottle
with dilution water.
5 days
20oC in the dark
The oxygen
consumed is
measured
directly.
Its behaviour
is more
closely parallel
that of the
waste in an
actual.
FACTORS The test measures only the
approximate amount of
oxygen.
Toxic substances
Chlorine
THANK YOU FOR LISTENING!
GOD BLESS
o Dissolved Oxygen and Biochemical Oxygen Demand Available at http://water.epa.gov/type/rsl/monitoring/vms52.cfm Retrieved 1 February 2015
o What Is Biological Oxygen Demand And How Does It Affect Water Quality? Available at http://www.freedrinkingwater.com/water_quality/quality1/1-bod-effects-on-water-quality.htm Retrieved 1 February 2015
o Chapter 9 of the Volunteer Estuary Monitoring Manual, A Methods Manual, Second Edition, EPA-842-B-06-003. The full document be downloaded from: http://www.epa.gov/owow/estuaries/monitor/
o Biological Oxygen Demand (BOD) Overview Available at http://www.polyseed.com/misc/BODforwebsite.pdf Retrieved 1 February 2015
o Gibbs et. Al., (1997) Introduction to BIOCHEMICAL OXYGEN DEMAND Technical Information SeriesBooklet No.7 Hach Company
REFERENCES