Teaching a 5th Grader about Chemical Oxygen Demand

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MANTECH strives to increase awareness about the importance of real-time results to improve water treatment practices and protect the environment.  Having results that are reliable, timely and representative is what MANTECH provides, particularly with the peCOD Chemical Oxygen Demand (COD) method. The peCOD method is capable of measuring COD in less than 15 minutes with green chemistry. The photoelectrochemical oxygen demand (peCOD) is a patented nanotechnology-based approach for COD analysis that overcomes the limitations of current COD analysis methods for wastewater applications. The PeCOD® COD Analyzer directly measures photocurrent charge originating from the oxidation of the organic contamination in a sample. The core technology that hosts the oxidation process is the peCOD sensor, which consists of a UV-activated nanoparticle TiO2 photo catalyst coupled to an external circuit.

The peCOD method is proven to be an excellent Biological Oxygen Demand (BOD) screening tool, providing accurate BOD estimates in just minutes versus the standard 5-day BOD test (BOD5). Exceptional correlation can be observed between peCOD results and BOD, stronger in fact than the dichromate method, due to the fact that peCOD does not require pre-digestion of the sample. The quick analysis time provided by the peCOD method allows process facilities to have access to COD data 24/7. The real-time data is beneficial for plant operation and optimization to make timely decisions. There are many situations where peCOD data is extremely valuable in scaling discharge COD levels and saving on chemicals used for treatment processes.

In October 2017, MANTECH took on the challenge from the Water Environment Federation to teach a 5th grader about the importance of water. The result was this short video that highlights the simplicity of the peCOD technology, and how a real-time result can make a large impact. Demonstrating a new technology to a young audience and providing them with hands-on experience helps them understand the importance of proper wastewater management and treatment at a young age.



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