Recycle of electrolytically dissolved struvite as an alternative to enhance phosphate and nitrogen recovery from swine wastewater

► The struvite dissolution was enhanced with increased NaCl concentration and electric voltage; however 0.06% NaCl and 7 V was considered optimum. ► Reaction time of 1.5 h found to be suitable for struvite dissolution and complete NH4-N removal. ► Struvite dissolution increases with increased struvite amount, but beyond 1.25 g/L of struvite a plateau was reached. ► The PO43−-P and NH4-N removal percentage increases significantly (p < 0.01) with increased recycle ratio of dissolved struvite.