CEN/TR 15809:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Hygienic considerations
  4.1 General
  4.2 From concept to good practice
  4.3 Aspects of microbiology, virology and parasitology
  4.4 Aspects of epidemiology
  4.5 Definition of the hygienic objective of treatment
5 General methodologies and tools to define the hygienic
  effect of treatment, and to manage the hygienic safety
  5.1 General
  5.2 Health risk assessment
      5.2.1 Hazard identification
      5.2.2 Dose-response assessment
      5.2.3 Exposure assessment
      5.2.4 Risk characterisation
  5.3 Quality Assurance and Hazard Analysis and Critical
      Control Point (HACCP) for use in sludge
6 Treatments available: efficiency and drawbacks
  6.1 General
  6.2 Biological treatment
      6.2.1 Anaerobic digestion
      6.2.2 Composting
      6.2.3 Thermophilic aerobic digestion (TAD) or Aerobic
            thermophilic stabilisation (ATS)
      6.2.4 Long term storage
      6.2.5 Reedbeds
  6.3 Chemical treatment
      6.3.1 Treatment with lime
      6.3.2 Other chemical methods
  6.4 Physical treatment
      6.4.1 Pasteurisation of sludge
      6.4.2 Thermal drying
      6.4.3 Thermal hydrolysis
  6.5 Combined treatment and other methods
Annex A (informative) - Micro organisms which could be found
        in sewage sludge
Bibliography

This CEN Technical Report gives information about principles to be followed in different sludge treatment processes to reach specified hygienic requirements.