Article | November 21, 2016

Nitrification And DBP Control With Chlorine Dioxide

Source: Evoqua Water Technologies
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Nitrification And DBP Control With Chlorine Dioxide

Drinking water utilities that use chloramines as a disinfectant for their distribution systems are commonly plagued by nitrification, which can significantly affect water quality.

Nitrification is the microbial process in which ammonia is oxidized to nitrite and potentially to nitrate. Conversion of ammonia to nitrite in drinking water distribution systems is often caused by ammonia oxidizing bacteria (AOB) and nitrogen oxidizing bacteria (NOB). Nitrification in drinking water distribution systems can have serious adverse effects on water quality such as loss of total chlorine residual, release of free ammonia and formation of nitrite and/or nitrate from ammonia, lowering of pH, and increases in microbiological activity from low disinfectant residual levels.