REMOVAL OF AMMONIA WITH BIOLOGICAL PROCESS IN THE TREATMENT OF DRINKING WATER

More than 128 wells for drinking water purposes in Hungary have higher ammonia concentration than the limit required in the Hungarian Standard (MSZ) for water quality. The situation in the 'Alföld' region is particularly bad. The main cause of the change in the water quality derives from physicaL chemical and biological processes. The authors carried out several examinations during one and a half year in Csongrády Country, Hungary, to develop a water treatment process for small villages having similar problems. They examined the polluted ground water containing iron, manganese, ammonia and the substances which come to existence after airation, such as microbiological materials. The purpose of the investigation was to remove these contaminants mainly ammonia by physical and biological processes