Phosphorus Recovery from Wastewater Treatment Plants by Using Waste Concrete
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概要
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We evaluated a reaction process in which waste concrete was used to recover phosphorus from wastewater. We conducted experiments using various actual wastewater samples obtained by the sludge dewatering process at a sludge disposal plant. The removal ratios of orthophosphate ions from actual wastewater samples were higher than those in the case of model wastewater for which the initial concentrations of orthophosphate ions (131–161 mgP L−1) were equal to those for the actual wastewater sample and the Ca/P ratio (approx. 5 g g−1). This result indicates that the high concentration of calcium ions originally contained in the wastewater samples promotes the reaction of HAP. The novel phosphorus recovery process developed in this study, which is based on the use of waste concrete, has the potential to contribute to the inexpensive recycling of phosphorus resources.
著者
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Mohara Goro
Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo
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Iizuka Atsushi
Research Center for Sustainable Science and Engineering, Institute of Multidisciplinary Research for
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Nagasawa Hiroki
Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo
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Kumagai Kazukiyo
Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo
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Yamasaki Akihiro
Department of Materials and Life Science, Seikei University
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Yanagisawa Yukio
Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo
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