Incinerated sewage sludge ashes-potential and challenges

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Incineration is a "growing" technology to treat wastes and is highly representative in countries of Northern Europe. Literature reports the potential to upgrade incinerated sewage sludge waste incineration ashes in order to remove heavy metals with different technologies, like the electrodialytic process. Consequently, and according to specifications, ashes could be reused as adsorbents, construction materials or in agriculture. Ashes from sewage sludge generally contain high concentrations of phosphorus (P) and can be regarded as secondary P resources. For this, a viable option is to recover phosphorus as a clean product so it can be reused. The conducted review presented here, showed that the electrodialytic process has proven to be a suitable technique for phosphorus recovery and heavy metals removal. The finally obtained clean phosphorus product can be reused in agriculture and/or industries, the removed heavy metals can also be recycled, and the cleaned ash can be further reused as a raw material, saving expensive landfill volume.

Original languageEnglish
Title of host publicationFly Ash: Sources, Applications and Potential Environments Impacts
Place of PublicationNew York
PublisherNova Science Publishers
Number of pages21
ISBN (Electronic)9781629480688
ISBN (Print)9781629480442
Publication statusPublished - 1 Jan 2013


  • Electrodialytic process
  • Heavy metal
  • Incinerated sewage sludge ash
  • Phosphorus


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