Assessment and valorization of treated and non-treated olive mill wastewater (OMW) in the dry region

International Journal of Recycling of Organic Waste in Agriculture

Ali Rhouma¹  Mounir Abichou¹  Haifa Rajhi¹  Inès Mnif² 

[1] Institute of Olive Trees;Laboratoire d’amélioration des plantes et Valorization des Agroressources, University of Sfax;

关键词: Olive mill water valorization;    Ponds evaporation;    OMW compounds;    Soil treatment;    Soil fertility;    OMW antibacterial activity;   

DOI  :  10.1007/s40093-018-0206-x

来源: DOAJ

【 摘 要 】

Abstract Purpose The quantity of Olive by-products does not stop increasing and a water shortage that threatens the olive tree culture; require a serious valuation of these by-products. A comparative and valorization study of two kinds of OMW; Fresh OMW (FOMW), directly issue from three-phase continuous extraction factory and Disposal Evaporation Ponds OMW (DOMW) were done. Methods Physico-chemical and biological parameters of OMWs and soil irrigated with OMWs, respectively, were determined. An antibacterial activity test of FOMW against Clinic Standard Bacteria was determined. A statistical analysis was performed for all defined parameters. Results A significant increase of pH value of 6 and a lower failure of the EC in 8.94 (mS/cm−1) were registered after OMW disposal in evaporation ponds. We registered a fall of BOD5 and COD from 61.05–116.37 (g/L) to 55.67–103.82 (g/L), respectively. A significant increment of phenol compound removal was observed after OMW disposal. However, a switch of fatty acids distribution and content was observed, which several fermentation pathways could explain took place. This result suggested by a clear shift in biomass composition. An important soil fertility after DOMW soil irrigated was traduced by an important value of the germination index (170.55%) and efficient organic matter increment of 2.3%. A CMI rate of 32.76 (μg mL−1) was determined by FOMW against different clinic standard bacteria. Conclusion A spectacular soil fertility effect was obtained from DOMW soil spreading, that efficiently evaluate the OMW biological treatment. In addition, the FOMW was valorized as its powerful antibacterial.

【 授权许可】

Unknown