http://lattes.cnpq.br/2973684074460185; http://lattes.cnpq.br/2973684074460185; SABINO, Jessé Balbino.
Résumé:
The washing process is characterized by high water consumption and impacts caused by
improper disposal of its effluents in rivers, dams and seas, which contain a diversity of
compounds, so an efficient treatment system is of paramount importance to the sector.
This study aimed to verify the efficiency and viability of the electroflocculation process
(treatment by electrolytic cells) in the treatment of domestic effluent generated by
washing clothes, in relation to the conventional method (physical, chemical and
biological treatment). The studied effluent was collected from a washing machine that
consumes on average 80 L of water per wash cycle (totaling 240 L), where the
generated effluent is disposed of in the treatment system. First, preliminary analyzes of
the effluent generated by the washing procedures were performed, in which high values
were found in the following parameters: color, turbidity, pH and conductivity. Based on
the reduction of the values of these parameters, the efficiency of the electrolytic process
was evaluated. Next, four cells were constructed to treat the effluent (PE), which
differed by the arrangement and total area of the plates. The effluent EF was used to
compare the efficiency of the electrolytic process. The results showed that the
electrolytic process obtained efficiency, with a reduction percentage of 93.8% for the
color parameter, 94.5% for turbidity. With respect to operating cost, there was a
reduction of up to 77% of expenditure compared to the conventional method. It is
concluded that electrofloculation is a very viable methodology for the treatment of
effluents resulting from the washing of clothes with regard to water recovery and
reduction of operating cost.
