Oxygen demand, biochemical (Biological oxygen demand: BOD) refers to the amount of oxygen dissolved in water (DO) resulting from the measurement of oxygen microbes that left them fifth day temperature 20 degrees Celsius (DO5 = BOD) to see. aerobic microorganisms to decompose organic matter by how much is left in the early days would have cost more oxygen. After that, it began to decline steadily, if the high BOD indicates that the water is very dirty, but if the BOD means that the water is a little dirty.
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