WebThe COD is less specific than BOD as it measures the oxygen consumption for any pollutant that can be chemically oxidized, versus BOD which is only that portion which is … WebNov 10, 2015 · The BOD value is most commonly expressed in milligrams of oxygen consumed per liter of sample during 5 days of incubation at 20 °C and is often used as a …
What is the pH value? - xylemanalytics.com
WebIn the case of biodegradable organics, the COD is normally in the range of 1.3 to 1.5 times the BOD. When the result of a COD test is more than twice that of the BOD test, there is good reason to suspect that a significant portion of the organic material in the sample is not biodegradable by ordinary microorganisms. WebApr 16, 2024 · Fig. 1: Structure of a pH scale for determining the pH value. All pH values lower than 7 show an increased activity of the hydrogen ion and are therefore acidic. When the activity of the hydrogen ion (proton) decreases, the activity of the hydroxide increases, the pH value becomes greater than 7 and the solution becomes basic. Technically, pH ... bowden freight international
Biochemical Oxygen Demand - Water Education Foundation
WebJun 7, 2024 · Table 28.2 shows the COD and BOD values of waste effluents from fruit and vegetable processing factories. The BOD/COD ratios of these processing waste effluents varied considerably and ranged from 0.50 to 0.72 [ 2 ]. The BOD/COD ratio can be a useful tool for rapid determination of the biodegradability of organic matter present in the wastes. WebThe higher the COD value, the more serious the pollution of organic matter by water. ... in Switzerland the COD for wastewater and industrial waste must be less than 200 and 1000 mg l −1, respectively, before it can be returned to the environment. It is possible to empirically relate COD to BOD, but it is specific to individual samples. WebMay 10, 2024 · The two values are close enough. But the maximum value of 3.1 from the actual data is 47.6% higher than the 2.1 COD/BOD value from the table above. And the minimum value of 1.7 is 19.0% less than the 2.1 value. What's my point you're very likely asking? It's a simple one. You need to be very careful in assuming the COD/BOD ratio is … bowden francis baseball