Process and denitrification plant for removing nitrates from drinking water

摘要

The invention relates to a process for removing nitrates from drinking water using an anion exchanger, according to which the raw water to be treated is passed through three ion exchange columns operating independently of each other having an exchanger bed in the bicarbonate form in the first ion exchange column, in the chloride form in the second ion exchange column and in the sulphate form in the third ion exchange column and the filtrate waters flowing out of the three individual ion exchange columns are blended to form pure water. As a result, a considerable reduction of the regeneration medium is achieved with increase in capacity. IMAGE