Operation costs are studied under the US-UV-H2O2-Fe system for several devices.
The synergism between the UV process and the sonolytic one was quantified as 55.2%.
The use of ultrasound (US) generates HO radicals, making the process faster.
Without US, thin film and conventional plant are cost comparable (∼2 €/m3).
The solar plant is faster and cheaper (1.3 €/m3 – 80% mineralization) in sunny days.