Dilution and respirometric BOD measurements and biodegradability testing
Measuring biochemical oxygen demand (BOD) is a critical process in water quality management, but the best methods for this measurement are debated. While the respirometric method may be useful for internal monitoring, it is typically compared to the more standard dilution technique widely recognized in regulatory settings. Photometric testing offers another way to measure BOD levels, providing flexibility in testing approaches. By understanding the strengths of each method, users can choose the most appropriate one for their specific needs, whether for compliance or internal quality checks.
You can learn more about different methods for measuring BOD in this extensive handbook from WTW, available for download. You can also find important information about our products for biodegradability testing.
Respirometric BOD measurement
In respirometric BOD testing, the oxygen consumed by microorganisms results in a decrease in pressure detectable by a pressure sensor. This method is practical and simple to execute and provides clear insights into microbial activity. Some advanced systems also measure the amount of methane gas produced by microorganisms, adding an extra layer of data toward understanding the biological processes at work.
Application notes
Learn more about how and where to use respirometric systems.
WTW respirometric systems
VELP Scientific
Dilution BOD measurement
Dilution BOD measurement
Photometric BOD measurement
Photometric BOD measurement
BOD incubators
All BOD methods require samples to be kept at 20 °C (68 °F) for 5 days. Avantor® offers a wide range of temperature-controlled incubators.
Lovibond® range of thermostatically controlled cabinets
VELP Scientific
OxiTop® thermostatically controlled cabinets
Need more information about our dilution and respirometric BOD measurement and biodegradability testing products?
Contact us today to discuss your needs. Our team is ready to help.