The paper aims to show the results of the elementary analysis of the sewage sludges from wastewater treatment plants in Gdynia Dębogórze and Lębork as well as measurements of the heat of combustion and the calculated calorific values according to regulation PN-93/Z-15008, taking into account water content and the composition of sewage sludge at different utilisation stages. The results presented in this paper are based on the analysis of the samples collected between August 2007 and November 2008. The wastewater treatment plants differ as far as sludge treatment and capacity are concerned. In Dębogórze, the sludge undergoes methane digestion before dewatering, whereas in Lębork, the sludge is stabilized aerobically. The Dębogórze plant discharges 60 000 m3 per day to the sea, the Lębork plant's capacity is six times smaller. In spite of these differences, both sludges were characterised by a similar percentage of elements. The values of the heat of combustion of excessive sludges and of those after digestion and aerobic stabilization were comparable.
Autorzy
Informacje dodatkowe
- Kategoria
- Publikacja w czasopiśmie
- Typ
- artykuł w czasopiśmie wyróżnionym w JCR
- Język
- angielski
- Rok wydania
- 2010
