Ultrasound treatment was applied with an ultrasonic system (UP 200ST, Hielscher
Ultrasonic, Teltow, Germany) operating at 26 kHz, 90 μm, 200 W attached with a probe of 14 mm Ø that was submerged (3 cm) into the water with the samples. Same processing time (300 s) was applied with continuous and pulsed modes of: (i) 10 s on/6 s off, (ii) 5 s on/5 s off and (iii) 2 s on/8 s off.