PD CEN/TR 15809:2008

PD CEN/TR 15809:2008 Characterization of sludges. Hygienic aspects. Treatments

When making choices in sludge management the hygienic aspects should be considered alongside the environmental impacts of treatments (such as energy use or emissions) and the benefits of the final product. Sludge treatments and practices that control health risks can also affect odour; in the public’s mind they are linked.

PD CEN/TR 15809 is a technical report which gives information about principles to be followed in different sludge treatment processes to reach specified hygienic requirements.

Contents of PD CEN/TR 15809:

• Foreword
• Introduction
• Scope
• Normative references
• Terms and definitions
• Hygienic considerations
• General
• From concept to good practice
• Aspects of microbiology, virology and parasitology
• Aspects of epidemiology
• Definition of the hygienic objective of treatment
• General methodologies and tools to define the hygienic effect of treatment, and to manage the
• hygienic safety
• General
• Health risk assessment
• Hazard identification
• Dose-response assessment
• Exposure assessment
• Risk characterisation
• Quality Assurance and Hazard Analysis and Critical Control Point (HACCP) for use in
• sludge
• Treatments available: efficiency and drawbacks
• General
• Biological treatment
• Anaerobic digestion
• Composting
• Thermophilic aerobic digestion (TAD) or Aerobic thermophilic stabilisation (ATS)
• Long term storage
• Reedbeds
• Chemical treatment
• Treatment with lime
• Other chemical methods
• Physical treatment
• Pasteurisation of sludge
• Thermal drying
• Thermal hydrolysis
• Combined treatment and other methods
• Micro organisms which could be found in sewage sludge
• Bibliography