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If rapid COD and online TOC measurements cannot measure the true COD value why does anyone make these measurements?

April 26, 2017Cod measure measurements online rapid TOC value

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If rapid COD and online TOC measurements cannot measure the true COD value why does anyone make these measurements?

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The reason for using these analytical techniques is speed of analysis. Its takes at least 2½ hours to collect, prepare, digest, cool and read a true COD value; online TOC analysis can give a result in under 10 minutes and do this automatically. If there is a problem with the waste treatment then the rapid analysis allows intervention to be made quickly – e.g. incorrectly treated waste can be diverted to a holding tank rather than being discharged to a watercourse.