Oxidation of Manganese with Active Use of Potassium Permanganate in the Water Treatment Plants in the Town of Gjilan, Republic of Kosovo

Gjilan (42°27’48’’N 21°28’09.7’’E) is one of the seven biggest cities in the Republic of Kosovo. Water supply for this city is enough for reasons of functioning of two plants of water processing in the city of Gjilan. One of the biggest plants for water is in Perlepnica village and another plant with smaller dimension to supply drink water is in Velekica village. The main issue focuses on the water treatment plant in the Velekica village because the presence of manganese (Mn+2) as metal is always present in six underground springs. Quantity of Mn mg /dm3 in groundwaters is out of norms allowed under WHO. The presence of this metal forces the water industry to use KMnO4 continuously. In the water the present of this metal is from (0.05-0.0015) mg /dm3 during 2017 and January 2018 and after the manganese processing process is reduced to (0.11- 0.31) mg /dm3. While in the water treatment plant in P？rlepnica village, there is no problem with heavy metals and the process of processing continues today without any problems