The potential use of olive mill sludge in solidification process

Nicholas Hytiris, I. E. Kapellakis, R. de La Roj, K. P. Tsagarakis

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31 Citations (Scopus)


The industrialisation of agriculture in the second half of the last century has been accompanied by an increase in production of organic wastes. Olive mill wastewater (OMW), a by-product of olive oil processing, is one such waste. It is produced in large quantities in the Mediterranean Region, an area that accounts for 95% of the total olive oil production worldwide. In recent years both physicochemical and biological treatment methods for OMW have been employed. Olive mill sludge (OMS), a by-product of the biological treatment methods, poses a major environmental threat, yet little research has been undertaken in its treatment and recycling. The aim of this study was to investigate the potential of using OMS as an additive for the development of construction materials. An attempt was made to solidify (fixate and stabilise) this sludge with cement, mixed with an improver/additive containing a mixture of natural and synthetic zeolites, alkaline elements, and oxides. The results to date appear to be very promising.

Original languageEnglish
JournalResources, Conservation and Recycling
Publication statusPublished - 1 Jan 2004


  • olive oil processing
  • organic wastes
  • waste recycling
  • environmental hazard


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