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.

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

Versatile UV-Absorption Photometer for Multi-Parameter Water Quality Analysis
Speak to the PMA team about your instruments, reagents or service requirements. Tell us what you need, and we’ll help you find the right next step.
Trusted by our clients
Share your requirements below. All fields are required.
Your enquiry goes directly to our team. Your details are used to respond to you, and you won’t be added to a marketing database. Read our privacy policy.
To find out more about our range of sensors, request a callback or ask a technical question, our expert staff are always on hand. Our focus has always been to deliver world-class customer service.
Get startedWe use optional Google Analytics cookies to understand which pages are useful. Analytics stays off unless you accept. Read our privacy statement.