Hydrodynamic Cavitation as a Clean Technology in Textile Industrial Wastewater Treatment

Abstract

The textile industry, according to world reports, is one of the industries that most pollutes water resources in its production process. It is estimated that a large amount of water is used in the production of a pair of jeans for dyeing, washing and finishing. This wastewater, when discharged into the receiving body without treatment, causes a negative environmental impact on ecosystems, especially humans. In the search for the treatment of these wastewater, the "hydrodynamic cavitation" method was applied with the aim of reducing the pollutants present and improving the physical-chemical parameters of these effluents. After 60 minutes of treatment, the pH was reduced by 23.95%, the total suspended solids by 82.82%, the biological oxygen demand was reduced to 64.77%, the chemical oxygen demand was reduced by 63.05%, in terms of the presence of oils and fats (O and F), the reduction was 93%, these parameters being within the established by the Peruvian regulations of maximum admissible values ??of wastewater discharge to the sewer. In addition, with regard to microbiological parameters, the application of hydrodynamic cavitation through the analysis of the Escherichia Coli parameter obtained a 100% reduction. Therefore, it is concluded that hydrodynamic cavitation is an efficient alternative method with the advantage of a clean technology in the treatment of wastewater due to low energy consumption and the non-use of polluting products. Keywords: hydrodynamic cavitation, wastewater treatment, textile industry, reduction of physico-chemical parameters.