The 2-Minute Rule for COD testing
The 2-Minute Rule for COD testing
Blog Article
Any person who takes advantage of the translated site does so at that human being’s personal danger. UGA Extension isn't responsible for any damages, expenditures, liability, or chance linked to any use, features, and/or material of the web site translations.
Nonetheless, it is important to notice which the correlation may not be best mainly because of the presence of inorganic carbon compounds, non-oxidizable natural and organic compounds, and versions from the composition of organic pollutants.
COD measurement amounts Usually get all over 2 several hours both inside of a laboratory or with an internet analyser, so is actually a more rapidly test than the usual BOD measurement which normally takes all around five times.
COD is best suited for rapid and Recurrent checking of remedy plant efficiency and drinking water high quality.
This process is pretty easy and provides a quick and correct measure of COD. On the other hand, it's got some cons, including the use of dangerous chemicals and The lack to differentiate in between biologically obtainable and inert organic and natural issue.
The five-working day completion window is surely an inherent disadvantage on the test for the reason that wastewater cure process staff simply cannot use it to make authentic-time operational adjustments.
During the presence of a robust oxidising agent within an acidic setting, nearly any organic and natural component will oxidise to carbon dioxide, according to the COD testing method.
The primary distinction between BOD and COD is usually that BOD is the level of oxygen that is certainly consumed by microorganisms even though decomposing organic make any difference underneath aerobic situations While COD is the quantity of oxygen necessary for that chemical oxidation of total organic & inorganic make a difference in H2O.
The possibility of working with An increasing number of refined equipment for This method rather than for the Other folks can be more info discussed in the acquisition in the products via the laboratories. When acquiring devices with the modifications presently preloaded, its use and upkeep is simpler.
Wastewater Procedure Effectiveness: COD measurements are essential for evaluating the effectiveness and efficiency of wastewater remedy procedures. By measuring the COD of influent (Uncooked) and effluent (addressed) wastewater, procedure plant operators can assess the success in the therapy course of action in eradicating organic pollutants.
It will involve the oxidation of natural and inorganic carbon compounds current inside of a h2o sample at large temperatures.
Divide the COD focus because of the BOD concentration for each sample and common the effects. By way of example, beneath will be the COD:BOD ratio made utilizing 3 wastewater samples from the meals processor:
The dichromate technique may be the most widely utilized and here consists of incorporating a recognised excess of potassium dichromate to a recognized volume of sample during the existence of sulfuric acid.
The quantity of natural and organic make any difference present while in the sample is calculated by the point required for your permanganate ion to lessen, building manganese dioxide. This compound catalyzes the decomposition of permanganate, Therefore escalating its usage of organic and natural subject.