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Abstract
Sludge composition is depending on sewage quality and also affected by processing methods such as thickening, stabilization and dewatering. During those processes some of sludge's undesirable properties might be reduced or enhanced.The objective of the study is the assessment of the influence of sludge processing on selected heavy metals partitioning between phases (aqueous and particle) and sludge. Sludge from the WWTP in Gdansk was investigated. During mechanical and biological treatment with MUCT technology the effectiveness of metals removal was >80% (except for Cd). The predominant form of heavy metals present in sewage is as a suspension. The distribution of analysed heavy metals " differed depending on the type of metal. Only small amounts of cadmium and lead were accumulated in the sludge, in contrast to zinc and copper. The loads of zinc and copper retained in the sludge were 780.4 mg/kg d.m. and 144.6 mg/kg d.m., respectively.
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- Category:
- Monographic publication
- Type:
- rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
- Title of issue:
- Management of pollutants emission from landfills and sludge strony 141 - 148
- Language:
- English
- Publication year:
- 2008
- Bibliographic description:
- Obarska-Pempkowiak H., Gajewska M.: Influence of sludge treatment processes on heavy metal speciation// Management of pollutants emission from landfills and sludge/ ed. eds. M. Pawłowska, L. Pawłowski. London: Taylor&Francis/Balkema, 2008, s.141-148
- Verified by:
- Gdańsk University of Technology
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