PERIODIC PARAMETER VARIATION IN A FULL SCALE TREATMENT PLANT WITH ALTERNATING OPERATION.
Biological nitrogen removal in a one sludge system based on alternating operation is described. Results from a half year of operation in a plant designed for a population of 33,000 people are presented showing 90% removal of total-nitrogen, 98% removal of BOD and 74% removal of total-phosphorus (without addition of chemicals). An experiment showing the parameter variation in the plant over 24 hour