Is BOD biological oxygen demand or biochemical oxygen demand?

Is BOD biological oxygen demand or biochemical oxygen demand?

Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature. When you look at water in a lake the one thing you don’t see is oxygen.

What BOD means?

Biochemical oxygen demand is the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic conditions. The common lake or stream contains small amounts of oxygen in the form of dissolved oxygen (DO).

What is full form of BOD Cod?

BOD (biochemical oxygen demand) COD (chemical oxygen demand)

What is BOD in chemistry class 11?

Biochemical oxygen demand: It is the amount of oxygen required by bacteria to carry out the decomposition of the organic matter present in a certain volume of a sample of water. It gives us an idea of the amount of organic matter present in water. Lesser the BOD in water, the more clean it would be.

What is biochemical oxygen demand BOD Class 12?

Biochemical oxygen demand (BOD) is defined as the amount of oxygen used by bacteria and other microorganisms during the process of decomposition of organic matter under aerobic (oxygen is present) conditions at a particular temperature and in specific time periods.

What is biological oxygen demand BOD quizlet?

Biochemical Oxygen Demand (BOD) A measure of the amount of oxygen necessary to decompose organic material in a unit volume of water. As the amount of organic waste in water increases, more oxygen is used, resulting in a higher BOD.

How is Biochemical Oxygen Demand measured?

Measuring biochemical oxygen demand requires taking two measurements. One is measured immediately for dissolved oxygen (initial), and the second is incubated in the lab for 5 days and then tested for the amount of dissolved oxygen remaining (final).

What is BOD 5days?

BOD—5. The standard oxidation (or incubation) test period for BOD is 5 days at 20 degrees Celsius (°C) (BOD5). The BOD5 value has been used and reported for many applications, most commonly to indicate the effects of sewage and other organic wastes on dissolved oxygen in surface waters (see TECHNICAL NOTE).

What is BOD Class 9?

BOD measures the amount of oxygen utilized by microorganisms for the process of decomposition of the organic matters in the water bodies. It symbolizes the amount of organic pollution present in an aquatic ecosystem. Biological oxygen demand can be used as an indicator of the level of environmental pollution.

What is meant by biochemical oxygen demand Mcq?

BOD or Biochemical Oxygen Demand measures the degree of impurity of a water body or sample due to organic matter. BOD is the amount of dissolved oxygen needed by aerobic microbes to breakdown the organic matter present in the water body. So, the correct answer is extend of pollution with organic matter.

Which of the following best defines biochemical oxygen demand?

Biochemical oxygen demand is a measure of the quantity of oxygen used by microorganisms (e.g., aerobic bacteria) in the oxidation of organic matter. For example, wastewater from sewage treatment plants often contains organic materials that are decomposed by microorganisms, which use oxygen in the process.

What is Biochemical Oxygen Demand How is it related to water quality?

Higher BOD indicates more oxygen is required, which is less for oxygen-demanding species to feed on, and signifies lower water quality. Inversely, low BOD means less oxygen is being removed from water, so water is generally purer.

How is the biological oxygen demand determined?

Biological oxygen demand is affected by the same factors that affect dissolved oxygen. Measuring biochemical oxygen demand requires taking two measurements . One is measured immediately for dissolved oxygen (initial), and the second is incubated in the lab for 5 days and then tested for the amount of dissolved oxygen remaining (final).

What is biochemical oxygen demand test?

The biochemical oxygen demand ( BOD ) test is a measurement of the quantity of oxygen required by bacteria to biologically oxidize organic material under aerobic conditions. Biochemical oxygen demand (BOD) is usually expressed in mg/L but can also be expressed in lbs/day.

What does BOD stand for?

What Is Biological Oxygen Demand in Wastewater Treatment? Biochemical oxygen demand or biological oxygen demand (BOD) is a measure of the amount of Dissolved Oxygen (DO) required by aerobic microorganisms to decompose organic matter present in a sample of water at a certain temperature over a studied period.