Table below shows the concentration of dissolve oxygen for a BOD test, diluted by 100. Time...

 

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Table below shows the concentration of dissolve oxygen for a BOD test, diluted by 100. Time (days) Diluted sample DO (mg/L) 0 7.95 1 3.75 2 3.45 3 2.75 4 2.15 5 1.8 i. Determine BOD5 ii. Given the deoxygenation rate coefficient of 0.15 day, determine the ultimate BOD iii. Based on answer from (i), identify class of the water sample based on INWQS guideline and propose suitable usage the water. Table below shows the concentration of dissolve oxygen for a BOD test, diluted by 100. Time (days) Diluted sample DO (mg/L) 0 7.95 1 3.75 2 3.45 3 2.75 4 2.15 5 1.8 i. Determine BOD5 ii. Given the deoxygenation rate coefficient of 0.15 day, determine the ultimate BOD iii. Based on answer from (i), identify class of the water sample based on INWQS guideline and propose suitable usage the water.