biochemical oxygen demand


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bi·o·chem·i·cal ox·y·gen de·mand (BOD),

the rate at which dissolved oxygen is consumed by an organism (often, a microorganism) or a culture of cells.

biochemical oxygen demand

n.
The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as that polluted by sewage. It is used as a measure of the degree of water pollution. Also called biological oxygen demand.

biochemical oxygen demand

The amount of O2 that aerobic bacteria require for oxidative metabolism when in aqueous organic matter—e.g., sewage.

biochemical oxygen demand (BOD)

an empirical standardized laboratory test designed to measure the oxygen requirements (or demands) of a given EFFLUENT. It is an approximate measure of biochemically degradable organic matter in a water sample. In its simplest form BOD is measured by taking a water sample of known volume, incubating it in the dark for a known period (usually five days), and measuring the oxygen levels at the start and end of the period. During the test the oxygen levels will have been reduced by bacteria in proportion to the amount of organic matter present.

biochemical oxygen demand

the amount of oxygen required in a specified period to decompose organic matter at a temperature of 68°F (20°C). Used to assess sewage effluent. Called also BOD.
References in periodicals archive ?
The biochemical oxygen demand measurement was carried out according to the international standard method for the [BOD.
A significant problem was the high biochemical oxygen demand (BOD) caused by chemicals in the wastewater.
Children are packing pH meters, turbidity tubes, magnifying glasses, biochemical oxygen demand bottles, nets and scoops, and heading down to the river, keen to learn how the real scientists do their stuff.
The organisms remove biochemical oxygen demand (BOD), which is organic matter that consumes oxygen in a body of water.
The CWA set up specific effluent guidelines for industry categories, and biochemical oxygen demand suspended solids continued to serve as the basic parameters.
TCCA was cited for excessive fecal coliform levels, dissolved solids, and biochemical oxygen demand.
EMB-6 Regional Technical Director lawyer Jonathan Bulos told Bombo Radyo here that there has also been an improvement in the river's dissolved oxygen and biochemical oxygen demand.
Biochemical oxygen demand BOD) levels, a key measure of water pollution, have increased between Panipat and Agra, thanks to hundreds of drains that dump untreated sewage in the river.
SEPA had filed a complaint against the Ansari Sugar Mills, saying that after a laboratory analysis of the wastewater collected from the mill, it was found to have excessive levels of biochemical oxygen demand, chemical oxygen demand, total suspended solids, oil and grease.
The samples were analyzed for the water quality parameters such as pH, Total suspended solids, Total dissolved solids, Chlorides, Chemical Oxygen Demand and Biochemical Oxygen Demand.
The LBOD IntelliCAL probe measures dissolved oxygen in biochemical oxygen demand (BOD) applications.

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