Monitoring of the main operational parameters of Aposelemis Water Treatment Plant (WTP).

Rising population, increased industrial and agricultural water usage as well as climate changes have brought great challenges to water supply of adequate quality and quantity. Thus, the water treatment industry has nowadays a greater emphasis on the optimization of water treatment plants to improve capacity, quality, operational costs and capital expenditure. Operation has become increasingly more complex over the past few decades as new technology has been developed and regulations have been tightened. The purpose of this study was the monitoring of the main operational and water quality parameters of Aposelemis Water Treatment Plant (WTP), which is located on the island of Crete and has a maximum capacity of 110,600 m3/ day. Its main processes are: ozonation, flocculation, sedimentation, sand filtration and chlorination. The main quality parameters [Turbidity, pH, Total Solids, Manganese (Mn), Aluminum (Al), residual ozone (Ο3), residual chlorine (Cl2)] of the water (untreated and treated surface dam water) and the main operational parameters [ozone generator performance (%), consumption of chemicals, consumption of chlorine gas (Cl2(g))] of the WTP were studied during the study period (2015-2018) and was not based on experimental laboratory scale data but on full scale industrial data.