Biochemical Oxygen Demand (BOD)

Biochemical Oxygen Demand (or BOD) is a typical measurement undertaken to assess the efficacy of a wastewater treatment process. By measuring the inlet BOD, the amount of organic material coming into the works can be gauged and by measuring the effluent, how effective the treatment has been can be defined. It is different to COD (chemical oxygen demand) in that COD measures all the organic material that can be oxidised whereas BOD just defines the biodegradable organic matter.

In wastewater applications, online BOD measurement can be used to determine the amount of dissolved oxygen needed by aerobic biological organisms to remove the organic material present in the water. Whilst it has traditionally be achieved by a manometric method or dilution method over 5 days (known as BOD5), online BOD sensors utilise the UV absorbance of organic material to estimate BOD in real time.

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Products for this application

s::can spectro::lyser

An online UV-Vis spectrophotometer for BOD measurement and more in wastewater.

s::can carbo::lyser

Online BOD sensor for organic carbon in wastewater.

Here is a related article

Wastewater effluent compliance monitoring solutions

Ensuring discharge compliance for COD, BOD and ammonia can lead to multiple instruments being required and maintained, increasing the complexity for operators.  A complete effluent water quality station can be created using s::can sensors.


River Water Pollution Monitoring

This truly spectacular case study demonstrates what can be achieved using s::can sensors in a complete water quality monitoring station setup.

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