A comparative study was carried out to evaluate the effectiveness of orthophosphate removal from wastewaters using two methods: electrocoagulation and metals solubilization. Both methods were found to enable orthophosphate removal with more than 90% effectiveness at relatively low concentration of orthophosphates in crude wastewaters. The method of metals solubilization is based on spontaneous corrosive processes occurring in wastewater. In contrast to electrocoagulation, its advantage is a lack of the necessity of applying voltage to solubilized electrodes (no consumption of electric current at this stage), while its drawback is the longer duration of the treatment process. This manuscript presents a comparative analysis of both these methods applied for the treatment of synthetic wastewaters with pH=3, pH=5, and pH=8. Depending on the type of wastewaters subject to the treatment process, the metals solubilization method may appear more justified economically, especially with both methods resuling in similar parameters of wastewaters after treatment.