The effect of electrolysis time was investigated in the range 5 to 110 minutes by the following conditions: 6.4
initial pH, 2.98 mA/cm
2
current density values. As can be seen in Fig. 3, an increase in the time from 5 to 90
minutes yield an increase in the efficiency of COD removal from 18.8 to 45.0% and the NH3-N removal from 9.4 to
44.1%, it does not change significantly after 90 min. When the electrolysis time increases, the concentration of iron
ions and their hydroxide flocs increase, also the rate of bubble-generation increases. The pollutants in leachate were
removed by the effect of coagulation and flotation. High electrical energy consumption with the increasing time, the
optimum time of electrolysis is 90 min.