Characterization of the harmful effect of olive mill wastewater on spearmint

Co-treatment of olive-mill and urban wastewaters by experimental stabilization ponds

“…The OMW COD and BOD 5 were respectively 642 and 444 times larger than those of UWW which were relatively low because of the primary sedimentation undergone. The content of total phenolic compounds was weaker than those reported by some Moroccan researchers [34,38,39]. The C18-HPLC analysis of crude OMW showed the presence of 6 main phenolic monomers (Table 1): hydroxytyrosol; 3,4-dihydroxyphenyl acetic acid; tyrosol; p-OH phenylacetic acid; vanillic acid and coumaric acid.…”

Valorization of treated olive mill wastewater in fertigation practice

“…This effluent is characterized by high polluting activity related to its low pH, high content of mineral salts, and high organic load (COD between 40 and 210 g/L). Crognale et al (2006) and Ouzounidou et al (2010) recorded large amounts of organic molecules constituted by long-chain fatty acids, lipids, sugars, proteins, and pectins increasing their organic load (El Hassani et al 2009a). Furthermore, OMW contains significant concentrations of polymeric phenolic compounds (between 0.5 and 24 g/L) that display a lignin-like structure constituting the most recalcitrant fraction of this effluent (Tsioulpas et al 2002).…”

Biodegradation of Toxic Compounds in Olive Mill Wastewater by a Newly Isolated Potent Strain: <i>Aspergillus niger</i> van Tieghem

“…The major components in the colored fraction are substances of polymeric nature, derived from several low molecular weight phenolic compounds, chemically related to lignin and humic acids [3]. OMW phytotoxicity is essentially linked to its high phenolic compounds content that are the modified forms of phenols of the olive fruit [4]. Because of its special characteristics, OMW treatment and valorization are serious problems for Mediterranean countries producing annually around 30 million·m 3 of OMW [4].…”

“…OMW phytotoxicity is essentially linked to its high phenolic compounds content that are the modified forms of phenols of the olive fruit [4]. Because of its special characteristics, OMW treatment and valorization are serious problems for Mediterranean countries producing annually around 30 million·m 3 of OMW [4]. Many processes have been developed to treat this effluent: The currently employed systems for OMW treatment can be classified as biological, physicochemical, or combined processes.…”

“…Many processes have been developed to treat this effluent: The currently employed systems for OMW treatment can be classified as biological, physicochemical, or combined processes. Various physico-chemical methods have been proposed for treating OMW, including simple evaporation, electrocoagulation [5], oxidation by ozone and Fenton reagent [6], as well as reuse of the OMW by spreading onto agricultural soil as an organic fertilizer [4]. The use of microorganisms to remediate contaminated sites or break down toxic effluent wastes is gaining wide acceptance and practice.…”