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Model investigationss [i.e. investigations] of ejector for dosage of ozone into water | Modelska ispitivanja ejektora za doziranje ozona pri mesanju sa vodom
2009
Batinic, B., Univerzitet u Beogradu, Beograd (Serbia). Gradjevinski fakultet | Prodanovic, D., Univerzitet u Beogradu, Beograd (Serbia). Gradjevinski fakultet | Randelovic, A., Univerzitet u Beogradu, Beograd (Serbia). Gradjevinski fakultet
A series of measurements has been conducted with various combinations of ejector dimensions. Variables were diameter of the nozzle and the distance between the end of the nozzle and the beginning of the pipe. Vacuum head in function of water flow was measured when there was no air flow, and when there was air flow (from a reservoir with constant volume). The results are presented in this paper.
Show more [+] Less [-]Effects of the pre-ozonation and coagulation on natural organic matter and arsenic content in water | Efekti procesa predozonizacije i koagulacije na sadrzaj prirodnih organskih materija i arsena u vodi
2009
Tubic, A. | Agbaba, J. | Dalmacija, B., Prirodno-matematicki fakultet, Novi Sad (Serbia) | Djurin, Z., JKP Vodovod i kanalizacija, Zrenjanin (Serbia) | Roncevic, S. | Maletic, S., Prirodno-matematicki fakultet, Novi Sad (Serbia)
Groundwater from the middle Banat region (Serbia) which is used as a drinking water supply for Zrenjanin town contains a high amount of natural organic matter and a high content of arsenic. In this study a pilot-scale system was used to investigate the influence of different ozone doses (0.4-0.9 mg O3/mg DOC) during a pre-ozonation process on NOM removal by coagulation. Ferric chloride coagulant was chosen at a dose of 100 g/cubic meter, as a traditional coagulant which can also help in arsenic removal. The obtained results indicate that an ozone dose of 0.4 mg O3/mg DOC has the best influence on structural changes of NOM. The coagulation process with ferric chloride as coagulant had a significant influence on the arsenic content of the water, with the measured values in the water after coagulation in all three investigated treatment trains being below 10 microgram/l, which is the standard MCL in Serbian legislation.
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