Street foliage
As road foliage is deciduous referred that in the autumn of traffic areas is obtained, at which street trees are.
disposal
The annual amount of leaves is not insignificant. In Berlin alone , for example, there are over 400,000 deciduous trees . According to its own information, the Berlin city cleaning service removes up to 90,000 cubic meters of street foliage every year (the amount corresponds to 2,600 railway wagons). The Hamburg city cleaning service had a leaf volume of 13,200 tons in 1996.
A problem with material or energy recovery is the pollutant content, similar to that of the cuttings from roadside surfaces. The contamination is caused in particular by the adhesion and deposition of air pollutants , for example heavy metals ( lead , cadmium , copper , chromium , nickel , tin ). The load depends on the traffic density and the distance to the road.
literature
- O. Tabasaran, A. Shiler: Analysis overview of composts and their starting materials from different origins and locations . Joint project of the BMFT “New Composting Techniques”, Subproject 5, University of Stuttgart, Institute for Sanitary Engineering, Water Quality and Waste Management, 1993
- W. Schröder, R. Wenk; J. Krinitz: Heavy metal content in street leaves and its composting . UWSF - Z Umweltchem Ecotox . 12 (6), pp. 322-330, 2000