Use environmentally friendly hydraulic power to design a hydraulic rapid mixing basin in the drinking water treatment plant

Abstract

Most cities in Iraq provide drinking water by purifying river water of physical and chemical contaminants. It uses energy from petroleum (electricity). As it seeks to get drinking water from the rivers with clean and renewable technologies and energy, the State of Iraq plans to use one of its most abundant resources to address the shortage of fresh water, namely hydropower. This study is based on the use of hydraulic energy (environmentally friendly) in the purification of water instead of the use of electricity. The use of electrical energy in water purification has a lot of problems, including the continuous interruption of the current and therefore stop the station from work and that it needs periodic maintenance and need to staff specialized for operation and maintenance, so it is expensive while the use of hydraulic energy will help to solve most of these problems. The possibility of replacing the rapid-mechanical mixing basin to the rapid hydraulic mixing, which operates according to the principle of forced forexes, where the study of the performance of the drinking water treatment plant in the eastern district of Al-Hamzah On the ADiwaniyah River in the southern province of ADiwaniyah, where concentrations of pollutants in the river are high in the study area. Where samples were taken from different locations for water in the drinking water treatment plant of Al-Hamzah for different treatment stages. Where the pollutants were examined in the laboratories of the Environment Directorate of ADiwaniyah and the laboratories of the Faculty of Engineering. All concentrations of physical and chemical contaminants were higher than the standards of Iraqi standards and the efficiency of treatment was not as low as 83%. This is due to the continuous interruption of electrical current and the failure of the mechanical equipment of the rapid mechanical mixing basin, which requires periodic maintenance and the continuation of the addition of high coagulant doses which cause high processing costs as well as the high concentration of aluminum used for coagulation. Therefore, a hydraulic mixing basin was used by conducting experiments in the fluid laboratory In the Faculty of Engineering using the Free and Forced Vortex, which has been developed and adjust suit the requirements of the study. There have been various experiments to obtain the best dimension of hydraulic mixer and best amount of coagulant to remove the turbidity and the best mixing speed and the best value of the pH, which achieved processing efficiency of up to 98.0%.