5 Simple Techniques For chemical oxygen demand test

By monitoring COD stages, industries and wastewater procedure services may take corrective actions to fulfill regulatory prerequisites.

Chemical oxygen demand refers to the level of oxygen needed with the chemical oxidation of natural and organic and inorganic components present in wastewater with oxidising agents for instance potassium permanganate, potassium dichromate, and so on.

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The COD test is usually a valuable measure of effluent high quality of the wastewater remedy plant. It provides a quick, approximate evaluate of all chemically oxidizable substances and can be utilized to detect performance issues in treatment amenities.

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Colorimetry also tends to make measurement quick considering the fact that all of the analyst has to do is digest the samples and Allow the instrument do the get the job done. For these reasons, colorimetry is the most common method to measure COD.

Digest your samples and a reagent blank. (The reagent blank is just a sample of deionized h2o that’s addressed similar to your real samples. You can even reuse the blank for so long as your reagent batch lasts.)

The high temperatures and oxidizing conditions trigger the carbon compounds from the sample to oxidize entirely, converting them into carbon dioxide (CO2).

All authors contributed towards the examine conception and style and design. The theory for that post was by PBH. The literature search and the initial draft on check here the manuscript have been published by.

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To get more info measure COD, the water sample is placed in a closed container and subjected to the potent oxidant, for instance potassium dichromate and sulfuric acid, for the specified length and temperature.

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