- Mar 8, 2017
- 8 min
OUR Level 3 Testing
Level 3: Treatability OUR Testing This level of oxygen uptake rate (OUR) testing is used to evaluate the impact of different chemical...
- Mar 8, 2017
- 4 min
OUR Level 2 Testing
Level 2: Time to Endogenous Respiration Many activated sludge systems do not achieve endogenous respiration by the time the mixed liquor...
- Dec 19, 2016
- 5 min
OUR Level 1 Testing
Level 1: Oxygen Uptake Rate—An Introduction Whenever I evaluate a biological treatment system there are two sets of tests I always run:...