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Microbiological quality of groundwater of water source of the city of Novi Sad [Serbia] | Mikrobiološki kvalitet podzemnih voda izvorišta vode za piće grada Novog Sada [Srbija]
2011
Petrović, O., Prirodno-matematički fakultet, Novi Sad (Serbia) | Knežević, P., Prirodno-matematički fakultet, Novi Sad (Serbia) | Simeunović, J., Prirodno-matematički fakultet, Novi Sad (Serbia) | Aleksić, V., Prirodno-matematički fakultet, Novi Sad (Serbia) | Petrušić, M., Prirodno-matematički fakultet, Novi Sad (Serbia)
The paper presents results of microbiological quality of three drinking water sources – Ratno ostrvo, Petrovaradinska ada and Strand. The following analyses were carried out in 2010: total count of aerobic mesophilic bacteria at 37 deg C, count of organotrophs (categorization according to Kohl), aerobic facultative organotrophs, lipolytic and hydrocarbon oxidizing bacteria. Organotrophic count was determined on low nutritive R2A medium. Enzymatic activity of water was also determined and water was categorized according to index of phosphatase activity (IFA).
Mostrar más [+] Menos [-]Influence of the ozonation process on the contents of selected chlorine disinfection by-products precursors | Uticaj procesa ozonizacije na sadržaj prekursora odabranih dezinfekcionih nusprodukata hlora
2011
Molnar, J., Prirodno-matematički fakultet, Novi Sad (Serbia) | Agbaba, J., Prirodno-matematički fakultet, Novi Sad (Serbia) | Dalmacija, B., Prirodno-matematički fakultet, Novi Sad (Serbia) | Rončević, S., Prirodno-matematički fakultet, Novi Sad (Serbia) | Kragulj, M., Prirodno-matematički fakultet, Novi Sad (Serbia) | Rajić, Lj., Prirodno-matematički fakultet, Novi Sad (Serbia) | Watson, M., Prirodno-matematički fakultet, Novi Sad (Serbia) | Leovac, A., Prirodno-matematički fakultet, Novi Sad (Serbia)
This study was performed to investigate the influence of the ozonation process on natural organic matter (NOM) and trihalomethane, haloacetonitrile and chloropicrin precursors in groundwater. The largest reduction in dissolved organic carbon, DOC (up to 25%) and UV 254 values (up to 69%) was achieved using 3 mg O3/mg DOC. Reducing the total organic matter resulted in a reduction of trihalomethanes precursors to 194 micro g/L. On the other hand, when it comes to the precursors of the high priority nitrogenous disinfection by-products, the oxidation of NOM by ozone and the resulting increase in organic matter with a low molecular lead to an increase in the haloacetonitrile precursors compared to the raw water and the formation of chloropicrin precursors.
Mostrar más [+] Menos [-]Some aspects of bacterial role in ground water | Neki aspekti uloge bakterija u podzemnim vodama
2011
Kaluđerović, D.
Due to development in the science, especially in the area of biodegradation, it becomes clear that different species of aerobic and anaerobic bacteria are indigenous in the ground water. Due to changed condition in ground water, like infiltration of petroleum hydrocarbons, indigenous bacteria start to react and are involved in different processes of natural biodegradation. Also, great contribution of understanding how bacteria functionating in ground water is given from the field of well regeneration due to consequences of biofouling and biologically induced corrosion. In this article several natural processes related to bacteria are analyzed and its importance and distribution in ground water is shown.
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