written 7.9 years ago by
teamques10
★ 65k
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• modified 7.9 years ago |
Mumbai University > First Year Engineering > Sem1 > Applied Chemistry 1
Marks: 3M
Year: Dec 12, May 13
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written 7.9 years ago by
teamques10
★ 65k
|
| BOD | COD |
|---|---|
| It measures the oxygen demand of only biodegradable pollutants. | It measures the oxygen demand of biodegradable and non- biodegradable pollutants both. |
| The process is slow and takes approximately 5 days | The process is fast and takes hardly 3-4 hours |
| BOD value is generally less then COD value | COD value is generally more than BOD value |
| It is less stable method since it uses microorganisms which are easily influenced by ph, temperature and other factors. | It is more stable method since it uses potassium dichromate which oxidises regardless of water conditions. |
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