|COD - chemical oxygen demand|
COD is the measure for the total food in the sewage of your factory going into the waste water treatment. The bacteria will use a part of this food (BOD) to stay alive and to grow. The other part will leave the treatment plant in the water or sludge.
Fluctuating loads will upset your treatment plant and will lead to bad treatment and foaming. Measuring the COD in the influent can help you controlling your treatment plant by means of feed forward control of the air compressors and increasing the return activated sludge. COD can also be toxic for bacteria above a certain concentration: inhibition of bacteria will lead to poor treatment as well or can lead to upset the treatment completely.
Measuring real time COD will also help you finding leaking points in the factory and their causes. This can save money in the production as well in the WWTP (less consumption of oxygen, less sludge).
COD is normally measured in the laboratory by means of chemical reactions with oxygen. Rhosonics offers a different way to measure the amount of COD in real time: CODeq; equivalant results but with a better technology. Rhosonics uses a combination of multiple ultrasonic technologies in one sensor to determine CODeq and TSSeq: The model 9580 should be selected for this application.
Common measuring range: 25 -100.000 mg/l O2