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Title: Considerații privind reactivitatea incarcarii organice naturale fata de clor din surse subterane tratatei sistem biologic pentru biooxidare ioni amoniu
Authors: Cosma, Cristiana
Patroescu, Viorel
Alexie, Mihaela
Bumbac, Costel
Tricolici, Olga
Cristea, Ionut
Keywords: Groundwater sources
Biological nitrification
Issue Date: 2014
Abstract: The presence of inorganic compounds containing oxidable nitrogen within groundwater sources at various,high concentration levels, especially in the case of NH+4 (NH+4 ≤ 8 mg/l), is asking for the replacement of classical oxidation technology using “break point” chlorination, due to non-conformities generated by high consumptions of chlorogenic agents (tens mg Cl2/l) upon the quality of treated water (acid pH, high ratio of residual bound chlorine, trihalomethans above the maximum admissible concentration). Biochemical oxidation using a bio-filter system in specific operating conditions (media type, temperature, oxygen demand, inorganic carbon and phosphorus sources, biological contact time, etc.) is representing a feasible technological alternative. Taking into account that carbon source used within the biochemical process is inorganic, the dissolved natural organic matters (NOM- humic matters) can react with the chlorine used in the final stage of biological effluent treatment. In the conditions of advanced removal of NH+ 4, oxidation to NO- 3, the chlorine dosages needed for effluent‟s finishing, disinfection are reduced. Experimental tests have as objectives to set up the chlorine dosage (Cl2 = 0,5 † 0,8 mg/l) that assures the disinfection of effluents resulted from biological nitrification step and a minimum ratio of residual bound chlorine, as well as the assessment of trihalomethanes formation potential in case of dissolved organic load, DOC ≤ 1,8 mg C/l (weight rations Cl2 / DOC = 1 † 8).
Description: Conferinta tehnico-stiintifica”Performanta in serviciile de Apa-Canal”
Appears in Collections:Conference Papers

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