WASTEWATER
By Rick Lallish
In a biological nutrient removal process, what is the condition where bacteria incorporate more phosphorus than needed for growth?
A. Denitrification
B. Endogenous respiration
C. Luxury uptake
D. Precipitation
Answer: C. Luxury uptake is the process by which bacteria cycle between anoxic or aerobic and anaerobic conditions. In that process, the bacteria tend to pick and store excess phosphorus in the anoxic or aerobic environment. With this mode, phosphorus may be removed from the treatment process when the biomass is removed from the system. The nutrient removal process has become more important to wastewater treatment in recent years, and operators should
