Olive growing water

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Olive vegetation water , also known as olive (mill) wastewater , abbreviation OMWW for olive-mill wastewater , is a waste product from the extraction of olive oil .

Extraction

How an industrial olive oil decanter works with the deductions of the three main products

When extracting olive oil in modern decanter centrifuges , a distinction is made between three main products: olive oil, pomace and waste water. The amount of this is determined not only by the natural vegetation water of the olive, but also by the added water.

properties

The vegetation water has a dark color, a characteristic, very intense fragrance, a slightly acidic pH value , good electrical conductivity and, due to the presence of sugars and proteins, it easily starts to ferment.

It has a high concentration of organic substances, including sugar , pectins , fats , nitrogenous substances, polyacids and mineral elements such as phosphorus , potassium , magnesium and calcium . The characteristic of this waste product, however, is the high phenol and polyphenol concentrations . The pronounced antimicrobial , antioxidant and phytotoxic effects make it resistant to biological decomposition in sewage treatment plants. It is therefore an environmental problem.

Processing and use

Over 30 million cubic meters of such wastewater are produced around the world every year. Since they cannot be broken down in sewage treatment plants because of their special properties, they pose an environmental problem. In recent years, several processes for treating and using wastewater have been developed. A preliminary stage is the concentration in large evaporation basins . There are around 400 of them in Greece alone. a. the use as liquid fertilizer in the olive tree plantations and composting.

Certain ingredients, such as hydroxytyrosol , tyrosol , verbascoside , oleuropein and oleocanthal , are said to have a health-promoting effect due to their antioxidant and anti-inflammatory properties, similar to the phenols in olive oil.

literature

  • Riccardo Delisi, Filippo Saiano, Mario Pagliaro, Rosaria Ciriminna: Quick assessment of the economic value of olive mill waste water . In: Chemistry Central Journal . tape 63 , no. 10 , 2016, doi : 10.1186 / s13065-016-0207-7 .
  • Evagelia Tsagaraki, Harris N. Lazarides, Konstantinos B. Petrotos: Olive Mill Wastewater Treatment . In: Utilization of By-Products and Treatment of Waste in the Food Industry . Springer, Boston 2007, p. 133–157 , doi : 10.1007 / 978-0-387-35766-9_8 .

Individual evidence

  1. R. Delisi et al., 2016, p. 1.
  2. C. Israilides et al .: Methods of integrated management of olive oil mill wastewater (OMW) in the framework of the EU environmental quality standards. In: PROTECTION2006 ( PDF  ( page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. )@1@ 2Template: Dead Link / www.srcosmos.gr  
  3. Teresa Rossi, Barbara Bassani, Cristina Gallo, Sally Maramotti, Douglas M Noonan: Effect of a Purified Extract of Olive Mill Waste water on Endothelial Cell Proliferation, Apoptosis, Migration and Capillary-Like Structure in vitro and in vivo . In: Journal of Bioanalysis & Biomedicine . June 4, 2015, ISSN  1948-593X , doi : 10.4172 / 1948-593X.S12-006 .
  4. Barbara Bassani, Teresa Rossi, Daniela De Stefano, Daniele Pizzichini, Paola Corradino: Potential chemopreventive activities of a polyphenol rich purified extract from olive mill wastewater on colon cancer cells . In: Journal of Functional Foods . tape 27 , December 1, 2016, p. 236–248 , doi : 10.1016 / j.jff.2016.09.009 .
  5. R. Delisi et al., 2016, p. 2.