The materials used in the construction of the experimental cells A,
B and C included: wastewater (sewage with initial COD of 2080 O2 g/
ml) of V=880 ml, Carbon electrodes Sodium Chloride (NaCl) solution,
0.6845M, plastic cylinders VB=1000 ml; soil (sandy loam); Copper wire
of L=7 cm attached to each electrode and plastic containers Vs=125
ml.(Figure 1).