Chemical Oxygen Demand (COD) is one of the widely used methods of measuring oxygen demand. COD is used as a measurement of pollutants. By definition, chemical oxygen demand is a measure of the oxygen equivalent of the organic matter content of a sample that is susceptible to oxidation by a strong chemical oxidant. It is normally measured in both municipal and industrial waste water treatment plants and gives an indication of the efficiency of the treatment processes. This efficiency is normally expressed as COD removal. COD has further applications in power plant operations, chemical manufacturing, commercial laundries, pulp and paper mills, agriculture and animal waste runoff, environmental studies and general education.

The goal in waste water treatment is not only COD reduction but also to control nitrogen and phosphorous which are responsible for eutrophication phenomena in natural environments. Effective monitoring and control of parameters such as ammonia, nitrate, total nitrogen and total reactive phosphorous allow plant managers to profile and improve the health of aquatic ecosystems. By accurately monitoring levels of each specific pollutant, operational parameters can be adjusted to maintain high efficiency of biodegradation treatments while also minimising costs.

Application:
HI83399 is a compact, multiparameter photometer for use in water conditioning applications. HI83399 benchtop photometer measures 40 different key water and wastewater quality parameters using 73 different methods that allow for multiple ranges and variations in chemistry for specific applications. The COD parameter is included for industrial and municipal wastewater treatment. The phosphorous and nitrogen parameters included are beneficial to municipal wastewater treatment customers that need to monitor their biological and chemical nutrient removal process. This photometer features an innovative optical system that uses LEDS, narrow band interference filters, focusing lens and both a silicon photo detector for absorbance measurement and a reference detector to maintain a consistent light source ensures
accurate and repeatable photometric readings every time. To save valuable laboratory benchtop space, the HI83399 doubles as a professional pH meter with its digital pH/temperature electrode input. Now one meter can be used for both photometric and pH measurements.

Tips for accurate measurement – HI83399:
• Colored or suspended matter in large amounts may cause interference. They should be removed by treatment with active carbon and filtration.
• Pay attention to align the white point on the cap to the indexing mark on the meter
• In order to avoid reagent leaking and to obtain more accurate measurements, close the cuvette first with the supplied HDPE plastic stopper and then the black cap.
• Shaking the cuvette can generate bubbles in the samples, causing higher readings. Remove such bubbles by swirling or tapping the cuvette.
• Do not let the reacted sample stand too long after reagent is added.

Contact:

Hanna Equipments India Pvt Ltd
Office No. 3/4/5/6, First Floor,
Aum Sai Building, Plot No. 23 C,
Sector 7, Kharghar,
Navi Mumbai- 410 210
Mob: +91- 7045792178
E-mail: marketing@hannainst.in
www.hannainst.in