Waste Water Treatment – COD vs BOD as a Measure of Waste Water Strength

BOD, Biochemical Oxygen Demand, is the standard measurement for determining the strength of waste water.    It is also a common regulatory tool used around the world to measure the strength of industrial waste water.   Most municipalities will charge a fee per 1,000 gallons of waste water when the BOD is considered to be high.    High BOD is generally anything over 1,000 mg/l where household BOD is around 350 mg/l.   Industrial waste water is often well above this threshold resulting in high fees from the sewer authority.   The sewer authority charges theses fees to cover increased cost associated with the high ... » Read More