Mechanical-Biological Treatment

The biomechanical treatment of residual waste and its impact upon landfill

Results derived from this complex research procedure have provided a well-founded overall picture of the effectiveness of various composting systems for residual wastes, taking account of waste management and ecological issues. On this basis, a comparison of these systems with waste incineration plants has been undertaken. 



The comprehensive research associated with this project fell within the scope of the overall procedure for the “Biomechanical treatment of landfill wastes”. The correlation of results may be expected to provide a well-founded overall view of the effectiveness of various systems for the composting of residual wastes, taking account of waste management and ecological issues.

Research was carried out in the industrial facility for the biomechanical treatment of residual wastes of Quarzbichl, in the district of Bad Tölz-Wolfratshausen.

The programme of operations encompassed five subject areas:

  • Composition of residual wastes
  • (description of household/industrial wastes and mixed wastes from construction sites in terms of their suitability for various material-specific treatment and recovery processes)
  • Mechanical processing and production
  • (evaluation of suitability for the effective separation of material flows)
  • Effectiveness of biological treatment stages
  • (comparison of purely aerobic processes with anaerobic variants, in terms of the effectiveness of degradation and the stabilisation of organic substances)
  • Parameters for the description of biological stability
  • (development of test methods, derivation of potential standard values and comparison with the customary standard values, namely, ignition losses and TOC)
  • Ecological evaluation of the biomechanical treatment of residual wastes and waste incineration, based upon the comparative analysis of energy requirements and toxic gas production.

Individual results for the various subject areas considered are fully documented and described in detail in the concluding report.  Amongst other conclusions, it has been demonstrated that:

  • the emplacement density of wastes after biomechanical treatment is up to 70% higher than that of wastes which have not be subject to preliminary treatment;
  • in comparison with waste incineration plants, variants for the biomechanical treatment of residual wastes show advantages in terms of their greenhouse gas potential and the release of toxic substances;
  • the waste incineration variants considered show a more favourable performance in terms of the formation of photo-oxidants.

More Project Informations

Project title:  Stabilisation of residual waste by biomechanical treatment and its impact upon landfill

Project number:  1480945/6

Project period:  1995 - 1998

Project region:  Germany (Hesse)

Project contact:

Herr Dr. Müller

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Source: German National Library of Science and Technology Hannover (TIB)