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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).
The standard oxidation (or incubation) test period for BOD is 5 days at 20 degrees Celsius (°C) (BOD 5). The BOD 5 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). The 5-day value, however,
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- Gregory C. Delzer, Stuart W. McKenzie
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special 2-day test and the standard 5 day BOD test using asparagine, glu tamic acid, and glucose as substrates. In a series of 21 BOD dilution tests using 1,000 ppm asparagine as sub strate, the special 2-day BOD test gave a F of 6 per cent while the standard 5-day BOD test gave a F of 9.5 per cent. Again, the special inoculum 2
Mar 6, 2012 · BOD also measures the chemical oxidation of inorganic matter (i.e., the extraction of oxygen from water via chemical reaction). A test is used to measure the amount of oxygen consumed by these organisms during a specified period of time (usually 5 days at 20 C).
It is most commonly expressed in milligrams of oxygen consumed per liter of sample during 5 days (BOD 5) of incubation at 20°C and is often used as a robust surrogate of the degree of organic pollution of water. Biological oxygen demand directly affects the amount of dissolved oxygen in rivers and streams.
waters. The 5-day BOD test has some drawbacks because: 1. The procedure requires an incubation time of at least 5 days. 2.The BOD method does not measure all the organic materials that are biodegradable. 3. The test is not accurate without a proper seed-ing material. 4.Toxic substances such as chlorine present in
provide an estimate of the BOD at pH 6.5 to 7.5. Measurements of oxygen consumed in a 5-d test period (5-d BOD or BOD 5, 5210B), oxygen consumed after 60 to 90 d of incubation (ultimate BOD or UBOD, 5210C), and continuous oxygen uptake (respirometric method, 5210D) are described here. Many other variations of oxygen demand measurements
