Nitrogen dynamic in vitro using sludge of a sewage stabilization pond from Patagonia (Argentina)

A relevant and current aspect of wastewater treatment systems is related to the processes nitrogen cycle that results in its elimination gaseous forms. In present study, we report first measurements nitrate-reducing rate (NRR) at lab-scale, using flow-through reactor technique with sludge a sewage stabilization pond system located Patagonia (Argentina). Sludge was collected from Inlet Outlet areas, winter summer. The characterized by having high moisture content (>94%) organic matter concentration greater than 37%. nitrate reduction experimental dates fitted significantly Michaelis-Menten model, allowing estimation parameters regulate NR kinetics. maximum potential (Rmax) showed great variability, registering 131.6 μmol-N·gdw−1·h−1 (Outlet-Summer) minimum 4.1 (Inlet-Winter). lowest half saturation constant (Km) recorded during (6.1 mg N-NO3−·L−1), which indicates affinity for this bacterial consortium. An unusually activity registered, being higher zone summer temperature. full-scale ponds, could explain part removal involves escape