Aeromatic

Aeration is responsible for half of the total electricity consumption at waste water treatment plants. Over-aeration is waste of energy and it also reduces total nitrogen removal efficiency.

Aeromatic control for aeration keeps the oxygen level optimal at all times. Control reacts immediately to any changes in influent wastewater properties. Control analyses the relation of the ammonium and oxygen concentrations in the aerated zones. Based on online measurements control sets optimal aeration volume and oxygen concentration for each aerated zone. Based on our experience optimal oxygen concentration in the aeration varies daily between 0,4 – 3,5 mg/l.

Daily variation of ammonium concentration in aeration and optimal oxygen level at Turku WWTP

Daily variation of ammonium concentration in aeration and optimal oxygen level at Turku WWTP

Benefits for the treatment plant
-Only required amount of air is supplied to the aeration. Excess oxygen does not inhibit denitrification and energy is saved in nitrification phase.
-Aeration volume and intensity are always set according to influent wastewater requirements.
-Less energy is used for aeration, total nitrogen is removed at higher rate and effluent quality remains constant despite peaks in influent wastewater

Control is applicable to all wastewater treatment plants that target either ammonium or total nitrogen removal with minimal investments.