Measuring the amount of organic Components
There are several ways to measure the amount of organic components in the water. One of these methods is the measurement of volatile matter, total solids, BOD and COD measurements. Because the measurement of the volatile matter component and the total solid content measurement has a relatively high error rate, it is used more than the biochemical oxygen demand (BOD) and the chemical oxygen demand (COD) to obtain the amount of organic matter in the water.
Biochemical Oxygen Demand (BOD)
Those substances that are decomposed by bacteria are measured by this index. Instead, they measure the amount of oxidizing material that they measure, the amount of oxygen needed by the aerobic decomposing microorganisms to oxidize that amount of matter. In this method, a 5-day standard is used which is displayed with (BOD5), and is the oxygen measurement that is consumed by bacteria in the water for 5 days at 20 ° C so that the materials Oxygen in the water. Therefore, to measure BOD, the dissolved oxygen dissolved in the sampling time and after 5 days in the sample should be obtained.
BOD5 = DO0-DO5
