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Project ID: ICA3-CT-2002-10033
Finanziato nell'ambito di: FP5-INCO 2
Paese: Morocco

Phyto-chemical characterization and fertirrigation by olive oil mill waste waters (OMW)

It has been found that Olive Oil Mill Waste Waters (OMW) have systematically a higher differences in terms of electric conductivity, proteins, soluble and bound phenolics and all of them exhibit a certain toxicity with regard to Zea mays germination at lab level. These results indicated that it will be difficult to have an universal strategy for the treatment of OMW by biological and/or chemical protocols leading to their detoxification and re-use in agriculture.

Several agronomical experiments have been conducted with crude OMW in greenhouse and in field taking into account their impact on the soil and on the growth and the biomass allocation of several species such as date palm, maize, atriplex and wheat.

When a moderate volumes of OMW were sprayed once a week or several weeks before sowing, no phytotoxicity has been revealed. In contrario, a positive effect has been detected concerning the biomass allocation in the case of the four species (maize, date palm, atriplex and wheat) that we have selected as the most suitable crops to be fertirrigated by OMW.

Concerning the impact of OMW on the soil, it has been detected that the effluents lead to a significant increase in salinity expressed by a high electrical conductivity (EC) and hydro-soluble sodium contents depending on the initial volume and the time. A significant increase in organic matter, total nitrogen content, phosphorus, potassium and hydrosoluble phenolics has been also detected.

However, the pH of the Marrakech soil did not show a significant difference compared to the control. This situation puts forward the neutralizing capacity of the calcareous soil with respect to the OMW acidity.

Informazioni correlate

Reported by

Research Department
University Cadi Ayyad, Faculty of Sciences-Semlalia, Laboratoire de Biotechnologies, Protection et Valorisation des Ressources Végétales, Département de Biologie, B.P. 2390
40 000 Marrakech
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