Journal of Wood Science

, Volume 45, Issue 6, pp 492–497 | Cite as

Biodegradation of nonlignocellulosic substances II: physical and chemical properties of sawdust before and after use as artificial soil

  • Sakae Horisawa
  • Masahide Sunagawa
  • Yutaka Tamai
  • Yuki Matsuoka
  • Tohru Miura
  • Minoru Terazawa
Original Article

Abstract

The physical properties of sawdust including porosity, water retention, and water drainage were analyzed to prove its suitability for use as an artificial soil in the automatic decomposer-extinguisher (GADE) machine. The physical and chemical properties of residual sawdust from the GADE machine were also analyzed, the mechanical abrasion of sawdust in the GADE machine was tested, and the morphology of this residue was observed through a scanning electron microscope to investigate changes of these properties in the medium of decomposing garbage. Sawdust, which showed a lower specific gravity and larger porosity than soil, is considered capable of supplying air to bacteria. It was found that sawdust became worn from the operation of the machine. The spaces of residual sawdust were still observed, but water drainage decreased. The portion of hollocellulose in residual sawdust decreased, although the extractives in it increased. Results indicated that the capacity of sawdust to function as an artificial soil in the GADE machine was decreased owing not only to the destruction of sawdust grain but also to the adherence of products from decomposition, such that sawdust needed to be replaced every few months.

Key words

Garbage Sawdust Porosity Water retention Water drainage 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Terazawa M, Tamai Y, Sunagawa M, Horisawa S, Miura T (1992) A novel system for garbage complete decomposition using sawdust and aerobic soil bacteria. In: Proceedings of the 7th European conference on biomass, energy and environment, agriculture and industry, Florence, Italy, pp 589–594Google Scholar
  2. 2.
    Terazawa M, Horisawa S, Tamai Y, Yamashita K (1999) Biodegradation of nonlignocellulosic substances I: system for complete decomposition of garbage using sawdust and aerobic soil bacteria. J Wood Sci 45:354–358CrossRefGoogle Scholar
  3. 3.
    Terazawa M (1992) The invention of the garbage automatic decompose-extinguisher (GADS) and ability of sawdust as an artificial soil (in Japanese). Hoppouringyo 44(2):1–5Google Scholar
  4. 4.
    Terazawa M, Tamai Y, Horisawa S, Yamashita K (1992) A novel system for garbage complete decomposition (2). Presented at the All division 5 meeting of IUFRO, Nancy, p 142Google Scholar
  5. 5.
    Horisawa S, Terazawa M, Yamashita K (1992) A novel system for garbage complete decomposition (3). Presented at the All division 5 meeting of IUFRO, Nancy, p 143Google Scholar
  6. 6.
    Terazawa M (1992) Proposal of the establishment of forest and agricultural biomass recycling system (in Japanese). Hoppouringyo 44(3):1–5Google Scholar

Copyright information

© The Japan Wood Research Society 1999

Authors and Affiliations

  • Sakae Horisawa
    • 1
  • Masahide Sunagawa
    • 2
  • Yutaka Tamai
    • 3
  • Yuki Matsuoka
    • 3
  • Tohru Miura
    • 4
  • Minoru Terazawa
    • 3
  1. 1.Institute of Wood TechnologyAkita Prefectural UniversityNoshiro, AkitaJapan
  2. 2.Forestry and Forest Products Research InstituteTsukuba, IbarakiJapan
  3. 3.Graduate School of AgricultureHokkaido UniversitySapporo, HokkaidoJapan
  4. 4.Amenity DivisionMitsui Home Co.Shinjuku, TokyoJapan

Personalised recommendations