Distinguish between BOD and COD.
|1.1t means the oxygen demand of bio-degradable
|it measures the oxygen demand for bio-degradable pollutants along with non-biodegradable pollutants.|
|2.Less stable measurement method as it uses micro-organism which are susceptible to pH, temperature and other variable in the water.||More stable measurement method as it uses potassium dichromate which oxidises regardless of water condition.|
|3. Siow process. It takes 5 days.||Fast process. It takes 2-3 hours.|
|4.BOD values are generally less than COD values.||COD values are generally greater than
|5.`BOD =(DO_b DO_i)xx(" Volume of undiluted sample")/(" Volume of diluted sample.")`||`COD = ((V_1-V_2 ) xx N xx 8000) /Y`|
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Solution Distinguish Between Bod and Cod. Concept: Bod - Definition and Significance.