Search
Abstract
The aim of the work was to determine changes of long-term sewage sludge quality stabilized in reed basins from 7-15 years. The following parameters were evaluated: dry matter and organic matter concentration, nitrogen, phosphorus, and selected heavy metal (Cd, Ni, Pb, Cr, Cu, Zn) fractions. The material for the investigations was collected from 4 reed basin systems (utilisated sewage sludge) located in conventional WWTPs in Denmark (serving from 9 000 to 40 000 pe, producing from 232 to 870 t of d.m/a). Based on the obtained results, it was found that the sludge in reed basins was dewatered and stabilized. Furthermore, it was found that the concentration of nitrogen decreased while the concentration of phosphorus increased. The analyzed heavy metals were mostly bound with the residual fraction and their concentrations were below permissible values for agricultural usage as determined by Polish law. Thus an obtained product - stabilized sewage sludge can be potentially used as fertilizer.
Authors (2)
Cite as
Full text
- Publication version
- Accepted or Published Version
- License
-
open in new tab
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
- Published in:
-
Environment Protection Engineering
no. 34,
pages 13 - 20,
ISSN: 0324-8828 - Language:
- English
- Publication year:
- 2008
- Bibliographic description:
- Kołecka K., Obarska-Pempkowiak H.: The quality of sewage sludge stabilized for a long time in reed basins// Environment Protection Engineering. -Vol. 34., iss. 3 (2008), s.13-20
- Verified by:
- Gdańsk University of Technology
seen 124 times