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.
Farlex Partner Medical Dictionary © Farlex 2012

biochemical oxygen demand

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

biochemical oxygen demand

The amount of O2 that aerobic bacteria require for oxidative metabolism when in aqueous organic matter—e.g., sewage.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Parameter Concentration (mg/L) Biochemical oxygen demand (BOD) 23,400-52,100 Chemical oxygen demand (COD) 80,100-95,000 Total carbohydrate 17,000-19,000 Total nitrogen 850-930 Ammonium nitrogen 24-31 Total phosphorus 96-120 Phosphate 15.2-20.6 Oil 8,500-11,000 Total solids 36,000-43,000 Suspended solids (SS) 9,400-12,500 Ash 4,200-4,600 Table 2: Physicochemical properties of palm oil milling effluents.
sampling events (TR x SE) and respective coefficient of variation (CV) for organic matter parameters in water of aquaculture systems: biochemical oxygen demand (BOD), dissolved organic carbon (DOC), chlorophyll-a, thin sediment (TS) and thick sediment (ThS).
Nutrition composition Rate Crude protein > 42% Crude fat > 5% Crude fiber < 4% Crude ash < 12% Moisture < 10% 2.3.1 Biochemical oxygen demand [BOD] test
After one year, the biochemical oxygen demand in the mulch treatments were not different from the bare soil control.
With an average treated flow of 75m3 per day (maximum flow of 1525m3 per day) and a BoD (biochemical oxygen demand) of 890 kilograms per day at the Masham plant, the BoD consent level of 5 mg/I is being met reliably.
Biochemical oxygen demand (BOD) biosensors have been developed to measure BOD faster than by the conventional method ([BOD.sub.5]), which requires a 5 day incubation of the solution.
The nine test were: temperature, pH, turbidity, total solids, dissolved oxygen, biochemical oxygen demand, phosphates, nitrate, and fecal coliform.
Other data collected included: water temperature, depth, air temperature, secchi disk, dissolved oxygen, fecal coliform, pH, biochemical oxygen demand (BOD), bird survey, invertebrates, vegetation and soil.
If the waste water ponds smell, they are not working properly and this directly causes irregular BOD (biochemical oxygen demand) reduction.
Surcharges are based generally on the biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids, oil and grease, nitrogen, phosphate and/or pH of the wastewater--and the heavier the level of organic matter in the wastewater, the higher the charge.
A significant problem was the high biochemical oxygen demand (BOD) caused by chemicals in the wastewater.
Treating 80,000 gallons per day (GPD) of municipal sewage generated by approximately 1,600 users, it takes influent COD (Chemical Oxygen Demand) from 479 mg/l down to 30.4, while BOD (Biochemical Oxygen Demand) is reduced from 241 mg/l to 7.0; TSS (Total Suspended Solids) from 161 mg/l to 3.00; and Ammonia from 14.6 mg/l to 0.25.

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