Single-sludge biological treatment systems for nitrification-denitrifi
cation and phosphorus removal have become widely accepted process opti
ons due to the increasingly greater demand for effluent nutrient contr
ol. The Soreq Biological Treatment Plant is a regional facility for mu
nicipal wastewater treatment and effluent reclamation for irrigation p
urposes, with a current average capacity of 220,000 m3/day. The perfor
mance data presented for one full year of operation (1989-1990) under
automatic process control indicate consistently high rates of carbon o
xidation, nitrification-denitrification and enhanced phosphorus remova
l.