METHOD OF TREATING WATER WITHIN A SEQUENTIAL BIOLOGICAL REACTOR COMPRISING AN ONLINE MEASUREMENT OF THE CONCENTRATION OF NITRITES

摘要

The invention relates to a method for treating a water charged with nitrogen in the form of ammonium in a sequential biological reactor, said method comprising at least: a first step (i) of feeding said water of said reactor sequential biological (10); a step (ii) aerated nitritation; a step (iii) anoxia of denitration; a step (iv) of extracting a treated water from said reactor; According to the invention, such a method further comprises an on-line measurement of the nitrite concentration of said water present in said reactor, a step of measuring the pH of said water contained in said reactor, a step of determining an information representative of the nitrous acid (HNO) concentration of said water contained in said reactor as a function of said on-line measurement of the nitrite concentration and said pH measurement, and a step of controlling the duration of said aerated step (ii) nitritation according to said nitrous acid concentration.