Decolorization of fresh and stored-black olive mill wastewaters by Geotrichum candidum

Assas, N.; Ayed, Lamia; Marouani, L.; Hamdi, Moktar

doi:10.1016/s0032-9592(02)00091-2

Cited by 95 publications

(62 citation statements)

References 15 publications

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“…It is particularly rich in organic matter and toxic fatty acids (Mekki et al, 2006;Sayadi et al, 2000). The high-molecular-weight polyphenols, similar in structure to lignin, give OMWW their characteristic brownish black colour (Assas et al., 2002;D' Annibale et al, 2004). Moreover, the high pollution potential of this effluent is commonly attributed to its high phenolic content of monomeric phenols, toxic to plants, water and some microorganisms (Capasso et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Identification and characterisation of phenolic compounds extracted from Moroccan olive mill wastewater

Leouifoudi¹,

Zyad²,

Amechrouq³

et al. 2014

Food Sci. Technol (Campinas)

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Section: Introductionmentioning

confidence: 99%

Identification and characterisation of phenolic compounds extracted from Moroccan olive mill wastewater

Leouifoudi¹,

Zyad²,

Amechrouq³

et al. 2014

Food Sci. Technol (Campinas)

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“…Because of inhibitory effects of phenolic compounds on microorganisms in this research was used OMW diluted with tap water (11,15,26,27). Figure 1 shows removal of total phenols from OMW with T. cutaneum.…”

Section: Resultsmentioning

confidence: 99%

“…This colour is owed to polyphenols, phenolic compounds with high molecular weights that are not easily biodegraded (1,26,27). This is why we used G. candidum in the second pass, as it is known to depolymerise polyphenols and produce enzymes that decolour OMW (11)(12)(13)(25)(26)(27).…”

Section: Resultsmentioning

confidence: 99%

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Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum

Dragičević

Hren

Gmajnić

et al. 2010

Archives of Industrial Hygiene and Toxicology

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Olive oil production generates large volumes of wastewater. These wastewaters are characterised by high chemical oxygen demand (COD), high content of microbial growth-inhibiting compounds such as phenolic compounds and tannins, and dark colour. The aim of this study was to investigate biodegradation of olive mill wastewater (OMW) by yeasts Trichosporon cutaneum and Geotrichum candidum. The yeast Trichosporon cutaneum was used because it has a high potential to biodegrade phenolic compounds and a wide range of toxic compounds. The yeast Geotrichum candidum was used to see how successful it is in biodegrading compounds that give the dark colour to the wastewater. Under aerobic conditions, Trichosporon cutaneum removed 88 % of COD and 64 % of phenolic compounds, while the dark colour remained. Geotrichum candidum grown in static conditions reduced COD and colour further by 77 % and 47 %, respectively. This investigation has shown that Trichosporon cutaneum under aerobic conditions and Geotrichum candidum under facultative anaerobic conditions could be used successfully in a two-step biodegradation process. Further investigation of OMW treatment by selected yeasts should contribute to better understanding of biodegradation and decolourisation and should include ecotoxicological evaluation of the treated OMW.

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“…These wastewaters have been shown to contain biologically active compounds such as phenolic antioxidants [7,8]. Tannins, commonly referred as tannic acid, are naturally occurring, water-soluble phenolic compounds with high molecular weight (MW) and many phenolic groups [9], referred to be present in OMW [10].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant activity of polar extracts from olive oil and olive mill wastewaters: an EPR and photometric study

Papadimitriou

Maridakis

Sotiroudis

et al. 2005

Euro J Lipid Sci & Tech

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Polar extracts from olive oil and olive mill wastewaters (OMW) were isolated and examined as direct scavengers of free radicals. In order to evaluate their potent antioxidant capacity, two experimental procedures were undertaken: electron paramagnetic resonance (EPR) in combination with a spin-trapping technique and a photometric procedure based on the formation of the N,N-dimethyl-p-phenylenediamine colored radical cation (DMPD 1. ). In the EPR study, free radicals were generated by oxidizing the lipid moiety of low-density lipoprotein or lecithin micelles by Cu 21 . Stable radical spin adducts were produced using the spin trap a-phenyl-t-butylnitrone. The formation of the three-line EPR signal was inhibited in the presence of compounds with known antioxidant activity or of polar extracts with potent antioxidant activity. The antioxidant activity of polar extracts from olive oil and OMW was also measured using the N,N-dimethyl-p-phenylenediamine (DMPD) colorimetric procedure. The antioxidant capacity of the extracts tested was expressed as trolox equivalents per mg of antioxidant. The extraction procedures of olive oil seem to affect olive oil content in antioxidants and, consequently, the corresponding antioxidant capacity. Tannin-rich polar extracts isolated from the OMW are much more potent in scavenging free radical formation than polyphenol-rich polar extracts from olive oil.

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Decolorization of fresh and stored-black olive mill wastewaters by Geotrichum candidum

Cited by 95 publications

References 15 publications

Identification and characterisation of phenolic compounds extracted from Moroccan olive mill wastewater

Identification and characterisation of phenolic compounds extracted from Moroccan olive mill wastewater

Biodegradation of Olive Mill Wastewater by Trichosporon Cutaneum and Geotrichum Candidum

Antioxidant activity of polar extracts from olive oil and olive mill wastewaters: an EPR and photometric study

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