- Title
- The effect of stabilization on the utilization of municipal sewage sludge as a soil amendment
- Creator
- Černe, Marko; Palčić, Igor; Pasković, Igor; Major, Nikola; Romić, Marija; Filipović, Vilim; Igrc, Marina Diana; Perčin, Aleksandra; Goreta Ban, Smiljana; Zorko, Benjamin; Vodenik, Branko; Glavič Cindro, Denis; Milačič, Radmila; Heath, David John; Ban, Dean
- Date
- 2019
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/188878
- Identifier
- vital:17332
- Identifier
-
https://doi.org/10.1016/j.wasman.2019.05.032
- Identifier
- ISSN:0956-053X
- Abstract
- Stabilization procedures affect nutrient and inorganic contaminant concentrations.•Anaerobic sludge has the highest levels of metals and radionuclides.•High P and N contents in sludge are a measure of its potential as a fertilizer.•Adsorption of metals and radionuclides to sludge biomass increases with nutrient content.•Soil amendment with sewage sludge is a promising strategy for nutrient recovery. This study assesses the potential use of different types of stabilized sewage sludge as a soil amendment by considering their physicochemical characteristics, nutritional status, and their trace metal and radionuclide content. The concentrations of trace metals and radionuclides were determined using ICP-OES and gamma-ray spectrometry, respectively. For determining nutritional status and chemical characterization, this study followed standard ISO-recommended procedures. Data analysis revealed that anaerobic sludge contains higher concentrations of Cr, Hg, and Ni compared to aerobic and non-biologically stabilized sludge. A similar observation was observed in the case of 226Ra, 210Pb, 228Ra, and 228Th. Furthermore, the high levels of P and N in aerobic sludge suggest that biologically stabilized sludge has the potential to be a good fertilizer. In addition, the study finds strong evidence that nutrients are involved in the adsorption of metals and radionuclides onto sludge biomass. Overall, eight of the nine studied sludge samples are safe for agricultural use since the concentrations of trace metals fall well below the limits set by Croatian legislation (NN 38/08). In addition, the levels of radionuclides do not pose a radiological risk. This means that soil conditioning with sewage sludge remains a viable strategy for nutrient recovery from municipal waste, although long-term impact assessments of repeated applications are necessary.
- Publisher
- United States: Elsevier Ltd
- Relation
- Waste Management Vol. 94, no. (2019), p. 27-38
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright Elsevier
- Subject
- Adsorption; Agriculture; Fertilizers; Metals, Heavy; Nutrient recovery; Radionuclides; Recycling; Sewage; Sewage sludge use; Sludge; Soil; Soil amendment; Soil Pollutants; Trace metals; Waste management; 4004 Chemical engineering; 4104 Environmental management
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