Reducing organic pollutant concentrations from wastewater power plants using hydrodynamic cavitation technology

Abstract

  Hydrodynamic cavitation technique was used recently as a treatment method for water contaminated with organic compounds, The conventional technologies for wastewater treatment have drawbacks in terms of limited application and efficiency. Use of hydrodynamic cavitations reactors for large scale pollutant degradation has shown great promising over past few years, due to high energy efficiency and low cost, treatment process relies on less chemical consumption to decompose various pollutants such as organic compounds and oil discharged with water used in washing and cooling equipment of electric power plants, aim of research was to investigate effect of hydrodynamic cavity duration on reducing concentrations of values chemical oxygen demand ( COD), total organic carbon ( TOC ), oil and evaluate efficiency of operation hydrodynamic cavity system. The experiments showed a weak decrease in concentrations of COD, TOC and Oil after hydrodynamic cavitation, values of COD, TOC and Oil were reduced (25.78%, 25.16%, 25.81%) respectively during 240 min operating time and 4bar pressure. Also, an increase in acidity function (pH) was observed, reaching (8.73) during an operating time of 24 min and pressure 4bar. Experiments proved, hydrodynamic cavitation of applied for time period 24 min and input pressure 4bar was good for operating conditions during laboratory experiments.