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Economic Evaluation of Phosphorus Recovery Processes

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The price of phosphate rock, which is used as a material for fertilizer, skyrocketed in 2008 and 2009 due to the economic growth of developing countries and the increased worldwide production of grain for bio-ethanol fuel. Since then, the price of phosphate rock has dropped to its previous level. However, taking into account the fact that Japan relies entirely on imported phosphate, which is produced in a limited number of countries and the export of which is restricted by major producing countries, and taking into account the future economic growth of developing countries and the expected depletion of phosphate resources in the future, it is necessary to take measures to secure phosphate resources. According to estimates, domestic wastewater contains an amount of phosphorus that exceeds 50% of imported phosphate rock, leading it to be considered as a likely potential phosphorus resource. Because of this, technologies concerning the efficient recovery and reuse of phosphorus from wastewater and sewage sludge are being developed.

A key point concerning the installation of phosphorus recovery technology is whether it is economically viable. The objective of this research is to focus on the costs of introducing phosphorus recovery processes, and how this is related to the capacity for wastewater treatment in wastewater treatment plants, a factor which has a large effect on cost. The research aims, then, to contribute to the economic evaluation necessary for investigating the installation of phosphorus recovery processes.

Keywords: Fertilizer; Hap; MAP; Phosphorus; Recovery; Sewage; alkali extraction of ash; carbonization; cost; economies of scale; installation space; partiallyreduced melting

Document Type: Research Article


Publication date: 2011-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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