BOD & COD

Full name of COD is:

• Chemistry Oxygen Demand

• Chemical Oxygen Demand

• Chemical Overall Demand

• Chemo-metric Oxygen Discharge

Full name of BOD is:

• Biological Oxygen Demand

• Biochemical Oxygen Degree

• Biochemical Oxygen Demand

• Biology Operation Data

You need to evaluate the degree of pollution of a water sample, but you only have three hours time to do it. Which test you will use?

• BOD

• COD

What COD is really measuring?

• Oxygen of compounds in the sample

• Unsaturated compounds in the sample that can be oxidized chemically

• Organic compounds in the sample

• Oxygen in the sample which could undergo chemical reactions

What BOD is measuring?

• Oxygen of biomass in the sample

• Micro-organisms in the sample

• Biodegradable compounds in the sample

• Oxygen generated by micro-organisms in the sample