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Open AccessArticle

Integrating Life-Cycle Perspectives and Spatial Dimensions of Sewage Sludge Mono-Incineration

1
Institute of Spatial Planning, Environmental Planning and Land Rearrangement, University of Natural Resources and Life Sciences, Peter Jordan-Strasse 82, 1190 Vienna, Austria
2
Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1267; https://doi.org/10.3390/w12051267
Received: 31 March 2020 / Revised: 20 April 2020 / Accepted: 27 April 2020 / Published: 29 April 2020
(This article belongs to the Special Issue Sewage Sludge Treatment and Reuse)
The mono-incineration of sewage sludge offers new opportunities to develop wastewater infrastructure as regional energy cells and resource recovery sites. At the moment, the most important products of this technology are electric energy and heat from combined heat and power plants, as well as ash for the recovery of phosphorus. With spatial analysis, scenarios of the decentralized and centralized spatial organization of mono-incineration are assessed with regard to the energy balances of the incineration process, transport demands, and the possibility to accommodate excess heat in the surrounding spatial fabric, and these are evaluated by applying a multi-criteria analysis. The study is based on the Austrian case and shows that the utilization, not only of phosphorus and excess energy but also of other potential resources should be aimed for. The transport of sludge and the potential to use excess heat in the surrounding spatial fabric decide if centralized or decentralized scenarios are environmentally more feasible, whereas an “economy of scale” clearly gives leeway to the centralized options. Therefore, this study clearly demonstrates that introducing mono-incineration should not only focus on the process engineering itself but should also consider spatial planning provisions to reduce transport demands and to deliver excess energy to the surrounding spatial fabric. View Full-Text
Keywords: integrated spatial and energy planning; sludge to energy; phosphorous recovery; energy recovery; wastewater treatment; circular economy; secondary resources recovery integrated spatial and energy planning; sludge to energy; phosphorous recovery; energy recovery; wastewater treatment; circular economy; secondary resources recovery
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MDPI and ACS Style

Wagner, D.; Neugebauer, G.; Kretschmer, F.; Stoeglehner, G. Integrating Life-Cycle Perspectives and Spatial Dimensions of Sewage Sludge Mono-Incineration. Water 2020, 12, 1267. https://doi.org/10.3390/w12051267

AMA Style

Wagner D, Neugebauer G, Kretschmer F, Stoeglehner G. Integrating Life-Cycle Perspectives and Spatial Dimensions of Sewage Sludge Mono-Incineration. Water. 2020; 12(5):1267. https://doi.org/10.3390/w12051267

Chicago/Turabian Style

Wagner, David; Neugebauer, Georg; Kretschmer, Florian; Stoeglehner, Gernot. 2020. "Integrating Life-Cycle Perspectives and Spatial Dimensions of Sewage Sludge Mono-Incineration" Water 12, no. 5: 1267. https://doi.org/10.3390/w12051267

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