Eficiência do processo de eletrofloculação no tratamento do efluente de uma lavanderia industrial

Abstract

This work consisted in checking the efficiency of the technique of eletrofloculação in the treatment of the effluent of an industrial laundry, located in the town of Medianeira in Paraná State. Washing clothes sector is characterized by the high consumption of water, and impacts caused by the inappropriate disposal of their wastewater, which contains a variety of compounds. Laundry in study on average consumes 4,032,000 l. day-1 of water in 3 washing procedures that are performed, where the effluent generated is thrown in the treatment system of the company. First was performed preliminary analyses of wastewater composed of wash procedures, where high values were found in the following parameters: DQO, phosphorus, colour and turbidity, which were the parameters under study to verify the efficiency of the electrolytic process. Central Composite Design was used to evaluate Rotational factors ddp and hydraulic retention time, and to show the results ANOVA statistical model was used, where it was concluded that the electrolytic process obtained efficiency in this type of effluent, with percentage of 87.5% reduction for COD, 93.6% to 83.1% turbidity, color. For the parameter match according to ANOVA, the model was not valid for a probable parse error at rehearsal 9, but watching the other essays, one can realize that there was efficiency of treated effluent in relation to the raw sewage, with a percentage of 98.6%.