Apparatus and method for denitrifying water

摘要

The raw water is loaded with hydrogen in a gas loading stage and is then passed upwardly through a bed of hydrogen consuming micro-organisms in the reactor. The gas-loaded raw water is guided so that the liquid and gas phases travel through the reactor in the same direction. The gas loading stage is substantially free from micro-organisms and nitrogen produced thereby. The contact times in the reactor are increased so that adequate quantities of hydrogen are either dissolved in the water or are available in the form of small rapidly dissolving gas bubbles.