Treatment of Olive Mill Waste Water by Adsorption on Hydroxyapatite-Sodium Alginate Composite

Abstract

The olive sector and in particular that of the extraction of olive oil requires large quantities of water, therefore obtaining olive oil generates two by-products, one liquid (OMWW) and the other solid (pomace). The OMWW are the aqueous phase resulting from the crushing of olives, causing worrying environmental problems in particular that it contains large quantities of organic compounds especially phenols compounds which cause many environmental problems such as water pollution. Therefore, the treatment of OMWW is very necessary. The purpose of this work was the investigation of the efficiency of hydroxyapatite-Sodium alginate composite for the adsorption of phenolic compounds, which are contained in OMMW. It showed promising results in reducing the phenol compounds and organic matter by 60% and 64% respectively and the reduction of Hydroxytyrosol and Tyrosol by 100% and 38% respectively, which are the most predominant polyphenols in OMWW. For second cycle of adsorption-desorption, the adsorbent lost slightly its adsorption capacity, reduction rate of phenol compounds and organic matter pass from 64% and 60% to 45% and 50% respectively.

Study the Effectiveness of the Natural Lagoons for Removal of Organic Matter, Nutrients and Fecal Coliform from Urban Domestic Wastewater under Arid Climate (Morocco)

“…The water resources in Morocco are affected qualitatively through industrial activities [Benaddi et al, 2022a;Benaddi et al, 2022b] and quantitatively by human activities, agricultural and industrial activities focused on satisfying food demands have also increased [Chaoua et al 2018; Mancosu et al 2015]. The use of water resources is at an all-time high in arid and semi-arid countries, including Morocco, due to recent irregular rainfall patterns, frequent droughts, and other environmental factors, consequently, water is becoming a precious resource.…”