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Abstract: Organized punctiform pollution sources - from the hydrographic basin of the upper and middle Mures - studies the most important domestic and industrial pollution sources of this sector. The period studied is between 2011 and 2013. To compare evolution in time of these pollution sources, 2002 was considered the reference year. It presents the evolution of the ion concentration of chemical pollutants in wastewater discharged into the river Mures and changes of wastewater discharged from different sources. The concentration value was obtained from laboratories.
Keywords: pollution, industrial wastewater, domestic wastewater, drainage basin, concentrations, ammonium ions, nitrat ions, phosphat ions, nitrit ions.
INTRODUCTION
Organized punctiform pollution sources refers to the discharge of pollutants from wastewater by sewage network into the aquatic environment.
The discharges are organized in individual identifiable points, established by projects.
The study refers to the organized punctiform pollution sources that are present in the upper and middle basin of the Mures.
The study was conducted over a period of four years, 2002, 2011, 2012, 2013. We chose 2002 as the reference year because of the major changes that occurred after the closure of important pollution sources.
The most important sources are:
- the industrial wastewater coming from the fertilizer plant in middle basin of the Mures[1];
- the wastewater from wood processing plants in the upper basin of the Mures[1];
- the food industry with an uneven distribution on the level of the basin;
- municipal wastewater;
- livestock farms [3].
Potential major sources of pollution (economic agents) present in the upper and middle basin of the Mures in 2013 [12]:
* S.C. GO. S.A. Gheorgheni
* S.C. AQUA CALIMANI S.A. Toplita
* S.C. AQUASERV S.A.- Reghin subsidiary,
* S.C. AQUASERV S.A. Tg-Mures
* S.C. AZOMURES S. A.
* S.C. AQUASERV S.A. - Iernut subsidiary
* S.C. ZAHÃRUL Ludus S.A.(Figure 1.)
In Figure 1. and Figure 2. we compared two maps presenting the spatial distributions of the main sources of pollution in the Mures river basin in 2002 and 2013. After 2011 important pollution sources we shut down: the Milk Powder factory from Remetea, S.C. Colemn S.A. Galautas (industrial wastewater treatment plant), S.C. Romsuintest Peris S.A. from Gornesti, the Tg. Mures Sugar factory, S.C.C. ZOO. Ardealul S.A. (Nutrimur) Iernut.[2]
1. INDUSTRIAL...