Traitement de la margine brute d’huile d’olive par distillation suivi de neutralisation par la chaux

Abstract

Objectif : Les margines sont le principal rejet liquide des huileries. Par leur composition chimique, elles possèdent un pouvoir polluant très élevé. Épandues sur les sols, les margines dégradent la qualité du milieu. Méthodologie et résultats : Dans le cadre des recherches sur les procédés de traitement des ces effluents, nous nous sommes intéressés à la techniques de distillation. L'analyse physico-chimique de la margine brute et distillat, montre que ce dernier se caractérise par des abattements très remarquables des composés phénoliques (97%), Demande Chimique en Oxygène (DOC) (92%), Demande Biologique en Oxygène (DBO) (96%), conductivité (99%,) et chlorures (97%). Conclusion et application des résultats : La distillation doit être suivie d'une neutralisation par la chaux à cause de l'acidité élevée du distillat. Des recherches sur la valorisation du distillat et du résidu sont en cours de réalisation. Mots clés : margine d'huile d'olive, caractérisation, distillation, neutralisation. The treatment of olive oil mill wastewater by distillation followed by neutralization with lime ABSTRACT Objective: The OMWW (olive oil mill wastewater) is the main liquid from olive oil mills. By its chemical composition, it has a very high polluting power. Applied to soil, vegetation, this water degrades the quality of the environment. The objective of this study was on treatment processes of these effluents, and particularly the distillation techniques. Methodology and results: The physico-chemical analysis of OMWW and its distillate showed that it is characterized by very remarkable reductions of phenolic compounds (97%), Chemical Oxygen Demand (DOC) (92%), Biological Oxygen Demand (BOD) (96%) conductivity (99%) and chloride (97%). Conclusion and application of results: The distillation must be followed by neutralization with lime due to the high acidity of the distillate. Research on optimization of the distillate and residue are in progress.

Re-using an oleic by-product in the manufacturing of fired clay bricks

“…The content of phenolic compounds is between 5.11g/and 8.34 g/l, these results are compatible with previous studies where the polyphenol content varies between 3 g/l and 9 g/l [ 34 , 35 ]. Indeed, in addition to the fruit variety and climatic conditions, the phenolic composition of the margins also depends on the separation techniques used to separate the oil phase from the water phase that results in the margins [ 36 , 37 ].…”

Centrifugation Effect on Olive Mill Wastewater Treatment by Coagulation-Flocculation Using Ca(OH)2-Pectin System

“…Its DM content was in accordance to that reported by Yahiaoui et al (48.85g/l)[19]. However, our value was smaller than those reported by Ouabou et al,[31] who characterized three different OMW and obtained 240.0; 138.4 and 147.4 g/l…”

Study of the Phytotoxicity of Olive Mill Wastewater on Germination and Vegetative Growth – Case of Tomato (S<i>olanum lycopersicum</i> L).

“…The phytotoxicity of OMWs is mainly attributed to their phenolic Study of the Phytotoxicity of Olive Mill Wastewater on Germination and Vegetative Growth -Case of Tomato (Solanum lycopersicum L.) content as well as the presence of other organic compounds such as aldehydes and short-chain fatty acids [Shabir and al., 2022], so they must require treatment before discharge into the receiving environment. Several studies have focused on the treatment processes of OMW, such as biological (aerobic, anaerobic) [Enaime and al., 2020; M. Rusan and al., 2016], physico-chemical (coagulation/ floculation, membrane filtration,...) al., 2016, 2017;al., 2010, 2009], thermal (incineration, evaporation...) and distillation neutralization [Ouabou and al., 2014;Rusan and Malkawi, 2016]. However, the richness of OMW in organic matter and soil fertilizing elements, namely, nitrogen (N), phosphorus (P), potassium (K), and magnesium (Mg) [Chaari and al., 2015;Dakhli and Maalej, 2017], allows these effluents to be recycled as eco-fertilizers at a lower cost for soils, as well as a source of irrigation water in the Mediterranean countries suffering from water scarcity and soil degradation [Ahmali and al., 2020;Belaqziz and al., 2016; de los Santos and al., 2019; al., 2013, 2006;Piotrowska and al., 2011].…”