City of Belgrade – TREATING THE SLUDGE FROM THE BELGRADE’S STORMWATER DRAINAGE SYSTEM

The City of Belgrade and the City of Vienna identified the ecological damage which arises from the stormwater sludge dumped untreated into the river Danube. Especially the MA 30 (Magistratsabteilung 30, Wien Kanal) and the local pendant the Agency For Land Development And Construction of Belgrade sealed a partnership for the mitigation of this environmental risk.

Within the framework of INTERREG-CADSES and UTN II, BLUESAVE provides sustainable solutions for the technical, financial and ecological problems.

The stormwater drainage system in Belgrade consists of drains on the surface of the streets and catch basins which are placed below the drains where the stormwater is collected and conveyed to the succeeding stormwater system.

The stormwater brings in material of different composition and size starting from organic material including leaves, branches and pollutants to mainly inert material like stones, pebbles, clay, silt and sand.

Preliminary analyses showed that, apart from this organic and inert material, the sludge also contains lubricants, fuel remnants, detergents, and in some cases dangerous chemicals and heavy metals.

In some areas also domestic and industrial waste is found in these basins.

The municipality of Belgrade prevents blockages arising from the stormwater sludge by empting these basins regularly with vacuum trucks.

The ecological concern is that the trucks take this sludge out and dump it without any treatment or processing into the River Danube. This leads to a continuous accumulation of persistent heavy metals and other harmful contamination of the biological ground flora and fauna of the River Danube. The big amounts of sludge may also narrow the fairway for the navigation on the river.

Since there is no Wastewater Treatment Plant in Belgrade an independent technological and financial solution for the stormwater treatment has to be elaborated.

BLUESAVE services comprise:

  • Environmental Impact Analysis, effect on the river itself and the population through harmful substances.
  • Develop several technical solutions for the treatment process and find the appropriate place for the facilities
  • Elaborate a Financial Feasibility Analysis for the project with regard on the cost effective operation and maintenance of the facilities.

The mitigation and avoidance of drastic pollution of waters and soil is a challenge which is of crucial relevance for the further development of the Southeast European Countries in order to maintain a sustainable environment for both human beings and nature. By the means of a sensitiveness analysis and an environmental impact study the effect on the population and the natural surrounding can be evaluated and an activity plan elaborated.