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

n (Environmental Science) a measure of the organic pollution of water: the amount of oxygen, in mg per litre of water, absorbed by a sample kept at 20°C for five days. Abbreviation: BOD

bi′ochem′ical ox′ygen demand`

n. the oxygen required by aerobic organisms, as those in sewage, for metabolism. Also called biological oxygen demand. [1925–30]

biochemical oxygen demand

biochemical oxygen demand:

see seweragesewerage,
system for the removal and disposal of chiefly liquid wastes and of rainwater, which are collectively called sewage. The average person in the industrialized world produces between 60 and 140 gallons of sewage per day.
..... Click the link for more information. .

biochemical oxygen demand

[¦bī·ō′kem·ə·kəl ′äk·sə·jən di′mand] (microbiology) The amount of dissolved oxygen required to meet the metabolic needs of aerobic microorganisms in water rich in organic matter, such as sewage. Abbreviated BOD. Also known as biological oxygen demand.

biochemical oxygen demand

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

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.

单词	biochemical oxygen demand
释义	biochemical oxygen demand 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 n (Environmental Science) a measure of the organic pollution of water: the amount of oxygen, in mg per litre of water, absorbed by a sample kept at 20°C for five days. Abbreviation: BOD bi′ochem′ical ox′ygen demand` n. the oxygen required by aerobic organisms, as those in sewage, for metabolism. Also called biological oxygen demand. [1925–30] biochemical oxygen demand biochemical oxygen demand: see seweragesewerage, system for the removal and disposal of chiefly liquid wastes and of rainwater, which are collectively called sewage. The average person in the industrialized world produces between 60 and 140 gallons of sewage per day. ..... Click the link for more information. . biochemical oxygen demand [¦bī·ō′kem·ə·kəl ′äk·sə·jən di′mand] (microbiology) The amount of dissolved oxygen required to meet the metabolic needs of aerobic microorganisms in water rich in organic matter, such as sewage. Abbreviated BOD. Also known as biological oxygen demand. biochemical oxygen demand 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. See BOD See BAMEX Operations Center
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