There is a requirement to measure BOD/COD in a wastewater treatment plant in real time. Is it possible? And if so are there any sensors available in the market for it?
Realtech.com has a runtime monitoring senser solution for BOD/COD Sensor. My understanding is that COD is straight-ward to measure in real-time but BOD monitoring cannot be done in real-time. The sensor listed uses a BOD equivalent monitoring technique.
The governing environmental regulatory agencies for a specific waste water facility should have public statement of acceptable BOD monitoring methods.
If you want a real-time BOD, COD or coliform sensors look at Proteus Instruments. They can provide real time data even in wastewater applications and almost need no maintenance. The results are pretty impressive. http://www.proteus-instruments.com. They now have dealers throughout the world.