Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Nitrification control by chlorite ion at pilot scale
A six‐month pilot study in Tucson, Ariz., investigated factors promoting nitrification and potential control methods. Twelve parallel plug‐flow pilot‐treatment trains were tested. The pilot units reproduced the nitrification process in a manner similar to nitrification occurrence in full‐scale distribution systems. Results confirmed previous laboratory and full‐scale studies indicating that the presence of chlorite ion prevents nitrification and stabilizes ammonia concentrations. At a concentration low of 0.1 mg/L and at three higher concentrations, a continuous chlorite ion feed prevented nitrification from becoming established. In systems with serious nitrification already under way, slug chlorite ion feeds as low as 0.2 mg/L stopped nitrification for several weeks. Utilities with severe nitrification problems may find that the cost of control with sodium chlorite is more than compensated for by eliminating the costs of traditional control and avoiding problems with coliform and disinfection by‐product compliance.
Nitrification control by chlorite ion at pilot scale
A six‐month pilot study in Tucson, Ariz., investigated factors promoting nitrification and potential control methods. Twelve parallel plug‐flow pilot‐treatment trains were tested. The pilot units reproduced the nitrification process in a manner similar to nitrification occurrence in full‐scale distribution systems. Results confirmed previous laboratory and full‐scale studies indicating that the presence of chlorite ion prevents nitrification and stabilizes ammonia concentrations. At a concentration low of 0.1 mg/L and at three higher concentrations, a continuous chlorite ion feed prevented nitrification from becoming established. In systems with serious nitrification already under way, slug chlorite ion feeds as low as 0.2 mg/L stopped nitrification for several weeks. Utilities with severe nitrification problems may find that the cost of control with sodium chlorite is more than compensated for by eliminating the costs of traditional control and avoiding problems with coliform and disinfection by‐product compliance.
Nitrification control by chlorite ion at pilot scale
McGuire, Michael J. (Autor:in) / Pearthree, Marie S. (Autor:in) / Blute, Nicole K. (Autor:in) / Arnold, Katie F. (Autor:in) / Hoogerwerf, Tanya (Autor:in)
Journal ‐ American Water Works Association ; 98 ; 95-105
01.01.2006
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Tucson, Arizona , Chemicals , Chloramines , Nitrification , Costs , Utilities , Sodium , Coliforms , Ammonia
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