Biological Oxygen Demand
WTW offers ...
Biochemical Oxygen Demand
In “dilution BOD” the oxygen content of a sample is measured with a dissolved oxygen sensor before and after an incubation period of 5 days. The difference between the measurements is the BOD5 value; this is the official EPA method.
In “BOD self-checks” with the respirometer, the reduction in oxygen causes a definite pressure difference that can be measured by a pressure sensor. This practical method is very easy to perform.
Both methods are very different, but the measurements correlate directly to the discharge seen at municipal wastewater treatment facilities. Both methods require the samples to be kept at 20 °C for 5 days. WTW offers a wide range of temperature controlled incubators.
Depletion/Respiration
As environmental consciousness increases, microbiological degradability tests have become increasingly important, from soil surveys from waste sites to environmental impact surveys to characterize new chemical substances. The necessary respiration measurements for anaerobic or aerobic degradation can be easily performed using the high performance OxiTop®-C systems. WTW offers a wide range of application specific packages complete with the appropriate sample vessels.
BOD Determination DIN EN 1899-1
Measuerement of diluted samples as standard method for BOD with optical and electrochemical sensors.
BOD determination according to DIN EN 1899-2
Respiromeric self-check method with pressure measuring heads.
BOD measurement with OxiTop®-IDS
Measurement of BOD according self check regulations at high sample volume and computer aided data sampling.
Aerobic and anaerobic degdartion methods with OxiTop®-IDS
In combination with a Multi 3620 or 3630 IDS and special vessels many degradation test can be performed.
IQ SENSOR NET
Measuring system for every wastewater treatment plant for up to 20 parameters, including BOD.
