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Numerical based on BOD and COD : 50 ml of water sample contains 840 ppm of dissolved oxygen

written 7.4 years ago by teamques10 ★ 70k

•   modified 5.9 years ago

50 ml of water sample contains 840 ppm of dissolved oxygen .After 5 days the dissolved oxygen value becomes 230 ppm after the sample has been diluted to 80 ml calculate BOD of sample.

engineering chemistry

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written 7.4 years ago by teamques10 ★ 70k

BOD =DO1 – DO2 X ml of sample after dilution / ml of sample before dilution

BOD =840 – 230 X 80/ 50

BOD = 976 ppm

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