What is BOD example?

What is BOD example?

Sources of biochemical oxygen demand include topsoil, leaves and woody debris; animal manure; effluents from pulp and paper mills, wastewater treatment plants, feedlots, and food-processing plants; failing septic systems; and urban stormwater runoff.

What is the importance of BOD?

The BOD is an important parameter for assessing water quality. It deals with the amount of oxygen consumption (mg O2 L− 1) by aerobic biological organisms to oxidize organic compounds. Sewage with high BOD can cause a decrease in oxygen of receiving waters, which in turn can cause the death of some organism.

Which pollution is measured by BOD?

Water pollutants are measured by BOD.

What is BOD Class 11?

BOD is the amount of dissolved oxygen required for biological oxidation of organic matter by aerobic microorganisms in a unit volume of water. BOD values are generally closer to the amount of oxidisable organic matter present in water and therefore, BOD is used as a measure of degree of water pollution and waste level.

What is BOD in chemistry class 12?

CBSE Class 12 Chemistry Notes: Enviromental Chemistry – Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) BOD, is a measure of the dissolved oxygen that would be needed by the microorganisms to oxidise these compounds.

What are the advantages of BOD test?

The main advantages of this method compared to the dilution method are: simplicity: no dilution of sample required, no seeding, no blank sample. direct reading of BOD value. continuous display of BOD value at the current incubation time.

Why is BOD preferred?

For all its shortcomings and the availability of a number of related measurement techniques, the BOD5 assay remains the preferred test for reporting the oxygen requirements of wastewaters, effluents, and polluted waters, in part, because of its international regulatory status, but also because it uniquely simulates the …

What is BOD value of water?

BOD is a measure of the amount of oxygen required to remove waste organic matter from water in the process of decomposition by aerobic bacteria (those bacteria that live only in an environment containing oxygen).

What do you mean by BOD and COD Class 12?

BOD: BOD stands for biochemical oxygen demand. It is a measure of the dissolved oxygen that would be needed by the microorganism to oxidise some of the inorganic and organic compounds present in the polluted water. COD: COD is another parameter called the chemical oxygen demand.

What is BOD test class 12?

– Biochemical oxygen demand (BOD), the amount of oxygen consumed by microorganisms for degradation of organic matter in the water. – The oxygen in the dissolved form in water. – When, BOD demand increases means lower the amount of Oxygen in water for other animals present in water.

What is BOD according to Ncert?

– Biochemical oxygen demand (BOD), the amount of oxygen consumed by microorganisms for degradation of organic matter in the water. – The oxygen in the dissolved form in water.

What does BOD stand for?

Full Article Biochemical oxygen demand (BOD), the amount of dissolved oxygenused by microorganisms in the biological process of metabolizing organic matter in water.

What is the role of BOD in water pollution?

When this happens, much of the available dissolved oxygen is consumed by aerobic bacteria, robbing other aquatic organisms of the oxygen they need to live. BOD level is a common metric for water pollution.

What is the biochemical oxygen demand (BOD)?

…sewage is indicated by the biochemical oxygen demand, or BOD; the more organic material there is in the sewage, the higher the BOD, which is the amount of oxygen required by microorganisms to decompose the organic substances in sewage. It is among the most important parameters for the design and… wastewater treatment: Activated sludge

What is the biological oxygen profile (BOD)?

The BOD is an empirical test to determine the molecular oxygen used during a specified incubation period (usually five days), for the biochemical degradation of organic matter (carbonaceous demand) and the oxygen used to oxidise inorganic matter (e.g., sulphides and ferrous iron). From: Wetland Systems to Control Urban Runoff, 2006.