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Carbonization Technology for Sewage Sludge and Utilization of Carbonized Products

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The formation of a recycling society in Japan has progressed with respect to the stringency of the final disposal ground for waste, and the effective use of resources. Up to now, sewage sludge has been subjected to hydration prior to disposal, and the incinerated ash has been utilized as the feedstock of construction materials such as Portland cement. These applications, however, have no future growth potential.

Recently, attention has shifted to the 50% portion of carbon in the sewage sludge, and subsequently the technology for manufacturing carbide from sewage sludge was developed in the Japan Sewage Works Agency in cooperation with a private company.

The properties of carbonized products are examined according to its similar use to charcoal. That is, it has already been put to practical use such as in soil improvement materials, adsorption materials, gardening soil, and as a supplementary agent for sludge dewatering, etc. Its use as coal substitution fuel in coal-fired power stations is the present objective. Effective use of the biomass energy to replace fossil fuel as one of the measures for controlling global warming is promoted as a national project in Japan. The sewage sludge carbonized products is attracting attention as a promising biomass energy source.

Document Type: Research Article


Publication date: January 1, 2005

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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 These proceedings are not peer reviewed.

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