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

International Journal of Recycling Organic Waste in Agriculture

مقاله 3، دوره 7، شماره 3، آذر 2018، صفحه 199-210   

شناسه دیجیتال (DOI): 10.1007/s40093-018-0206-x

نویسندگان

Haifa Rajhi¹؛ Inès Mnif²؛ Mounir Abichou¹؛ Ali Rhouma¹

¹Institute of Olive Trees

²National School of Engineers of Sfax

چکیده

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 defned parameters. Results A signifcant 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 signifcant 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 efcient organic matter increment of 2.3%. A CMI rate of 32.76 (μg mL−1) was determined by FOMW against diferent clinic standard bacteria. Conclusion A spectacular soil fertility efect was obtained from DOMW soil spreading, that efciently evaluate the OMW biological treatment. In addition, the FOMW was valorized as its powerful antibacterial.

کلیدواژه‌ها

Olive mill water valorization ؛ Ponds evaporation ؛ OMW compounds ؛ Soil treatment ؛ Soil fertility ؛ OMW antibacterial activity