In this study, a hybrid process for the treatment of compost wastewater was investigated using a combination of electrocoagulation, synthetic zeolite granulation <40 μm and two levels of ultrasonic power intensity of 240 W, minimum and maximum, corresponding to levels 1 and 5. The experiments were carried out in an electrochemical cell with aluminium, iron and zinc electrodes, at a constant current density of 0.0182 A/cm², an electrode distance of 3 cm, a stirring speed of 250 rpm, with the addition of 0.5 g/L electrolyte and 15 g/L zeolite. During the experiment, parameters such as pH value, temperature and electrical conductivity were monitored, while turbidity, total solids and chemical oxygen demand were determined at the beginning and end of the process. After a hybrid process the electrode mass changes and the settling test of the suspension were examined. The results showed that electrocoagulation with zeolite and iron electrodes using a level 5 ultrasonic power intensity is the most suitable for the treatment of composting wastewater. The calculation of operating costs showed that the simultaneous use of zeolite and ultrasound to improve electrode dissolution has no synergistic effect, except in the case of the hybrid ECZ process with Fe electrodes and a level 5 ultrasonic power intensity. This indicates that the choice of electrode material is a decisive factor in determining whether the simultaneous use of zeolite and ultrasound has a positive effect.