Dechlorination of municipal solid waste incineration residues for beneficial reuse as a resource for cement

Takayuki Shimaok, Teppei Komiy, Fumitake Takahashi, Hirofumi Nakayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As one of the beneficial resources reclaimable from municipal solid waste incineration residues (MSWIR), we studied the resource of cement and a dechlorination system to meet the JIS standard governing chlorine content in cement. A key problem of such a system is how to remove chlorines, especially insoluble chlorines such as Friedel's salt, from MSWIR by means of a low-cost treatment system. To develop an innovative dechlorination system for MSWIR, a pilot plant experiment to confirm the effectiveness of organic materials as additives for the dechlorination of MSWIR was conducted using large lysimeters. In addition, to estimate the chlorine-removal efficiency and the period required for sufficient dechlorination, a numerical simulation was carried out. In cases where no organic materials had been added to MSWIR, soluble forms of chlorine could be removed, but insoluble forms of chlorine - such as Friedel's salt, remained after treatment. On the other hand, when garbage compost was present as an organic additive, both soluble and insoluble forms of chlorine could be effectively removed. The removal of insoluble forms of chlorine was made possible by the decomposition of the insoluble forms resulting from a lowering of the pH level as a result of the decomposition of organic substances, and the generation of sulfuric acid derived from the decomposition of garbage compost. As a result, the total chlorine content of MSWIR can be decreased to 0.1% in about two years.

Original languageEnglish
Title of host publicationTesting and Specification of Recycled Materials for Sustainable Geotechnical Construction
PublisherASTM International
Pages412-433
Number of pages22
ISBN (Print)9780803175266
Publication statusPublished - Jan 1 2012
EventASTM International Symposium on Testing and Specification of Recycled Materials for Sustainable Geotechnical Construction - Baltimore, MD, United States
Duration: Feb 2 2011Feb 4 2011

Publication series

NameASTM Special Technical Publication
Volume1540 STP
ISSN (Print)0066-0558

Other

OtherASTM International Symposium on Testing and Specification of Recycled Materials for Sustainable Geotechnical Construction
CountryUnited States
CityBaltimore, MD
Period2/2/112/4/11

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Shimaok, T., Komiy, T., Takahashi, F., & Nakayama, H. (2012). Dechlorination of municipal solid waste incineration residues for beneficial reuse as a resource for cement. In Testing and Specification of Recycled Materials for Sustainable Geotechnical Construction (pp. 412-433). (ASTM Special Technical Publication; Vol. 1540 STP). ASTM International.