Mar 8, 20178 min read
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, 20174 min read
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, 20165 min read
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:...