Phospholipid fatty acid analysis to monitor the co-composting process of olive oil mill wastes and organic household refuse

Barje, Farid; Amir, Soumia; Winterton, Peter; Pinelli, Éric; Merlina, Georges; Cegarra, J.; Revel, Jean-Claude; Hafidi, Mohamed

doi:10.1016/j.jhazmat.2007.10.089

Cited by 21 publications

(12 citation statements)

References 30 publications

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“…Le compostage est un processus aérobie de dégradation des composés organiques par l'action successive des micro-organismes (bactéries et champignons) dont la concentration peut atteindre des millions par gramme de compost (Barje et al, 2008, Jouraiphy, 2007, Amir, 2005Amir et al, 2010) ; leur évolution est en fonction des stades de compostage avec un profil défini, en fonction des espèces, à la nature et la structure des substrats et aussi liée principalement aux variations des paramètres physico-chimiques (Rosenzweig et al, 1980). Au cours du processus de compostage réalisé, la flore microbienne varie considérablement ( fig.9).…”

Section: Evolution De La Flore Microbienneunclassified

Valorisation Agricole D’un Compost Produit À Partir Du Compostage En Cuve Des Déchets Municipaux

Chennaoui¹,

Salama

Makan

et al. 2016

ESJ

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This work is in the context of the management and recycling of solid urban waste. The evolution of the physicochemical and microbiological parameters during composting pilot scale household waste was studied. The maturity of the processes and the agronomic value of the finished product were examined. The results showed that the organic fraction of solid waste could be composted successfully in 60 days and revealing a vigorous microbial activity. The final compost has been satisfactory for its agricultural application. Phytotoxicity tests conducted on wheat and tomato crops, show that the incorporation of 25% culture support the compost allows a germination rate of up to 85% against 70% for the control for the variety of corn. In the case of tomatoes, we recorded a germination rate of about 67% against 58% for the control. Keywords:Waste, compost, recycling, maturity test European Scientific Journal December 2016 edition vol.12, No.35 ISSN: 1857 -7881 (Print) e -ISSN 1857-7431 248 RésuméLe présent travail s'inscrit dans le contexte de la gestion et la valorisation des déchets solides urbains. L'évolution des paramètres physicochimiques et microbiologiques au cours du compostage à l'échelle pilote des déchets ménagers a été étudiée. La maturité du process et la valeur agronomique du produit fini ont été examinées. Les résultats obtenus ont montré que la fraction organique des déchets solides pourrait être composté avec succès dans un délais de 60 jours et révélant une activité microbienne vigoureuse. Le compost final a été satisfaisant pour son application agricole. Les essais de phytotoxicité menés sur des cultures de blé et de la tomate, révèlent que l'incorporation de 25% du compost au supports de culture permet un taux de germination allant jusqu'à 85 % contre 70 % pour le témoin pour la variété du blé. Dans le cas de la tomate, nous avons enregistré un taux de germination de l'ordre de 67 % contre 58 % pour le témoin.

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Section: Evolution De La Flore Microbienneunclassified

Valorisation Agricole D’un Compost Produit À Partir Du Compostage En Cuve Des Déchets Municipaux

Chennaoui¹,

Salama

Makan

et al. 2016

ESJ

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“…[10] This fall in the level of extractable lipid supports the work of numerous authors studying waste composting. [13,17] It can be attributed to their breakdown by the intense microbial activity, nevertheless, it has been shown [18] that lipids which are not directly extractable are less biodegradable, for instance those chemically bonded to organic matter or adsorbed by the mineral matrix. After the decrease in extractible lipids, significant increases in FAMEs occurred during co-composting in both trials: FAMEs rose by 8.44-33.30% and 10.76-43.40% for mixtures A and B, respectively.…”

Section: Fame Patternsmentioning

confidence: 99%

Identification and assay of microbial fatty acids during co-composting of active sewage sludge with palm waste by TMAH-thermochemolysis coupled with GC-MS

Fels

Ouaqoudi

Lemée

et al. 2014

Chemistry and Ecology

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The fatty acids of two composts of active sludge with palm tree waste were investigated by thermochemolysis coupled to gas chromatography-mass spectrometry. This method (tetramethylammonium hydroxide-pyrolysis-gas chromatography-mass spectrometry) allowed the direct determination of total fatty acids (analysed as fatty acid methyl esters: FAMEs) present in the organic matter of the samples without any separation procedures. Mixture A was 1/3 sludge + 2/3 palm waste and mixture B was 1/2 sludge + 1/2 palm waste. The level of FAMEs rose by 8.4-33.3% and 10.8-13.4% in mixtures A and B, respectively, after 6 months of co-composting. Branched FAMEs of bacterial origin (iC15:0) rose during the thermophilic phase, in mixture A the aC17:0/aC15:0 ratio increased during the co-composting process, also in mixture B the aC16:0/C16:0 ratio rose but only during the thermophilic phase. All the FAMEs identified showed a drop at the end of co-composting except for C18:0 and C16:0. The stabilisation phase was characterised by a significant rise in the length of the aliphatic chains; the carbon preference index thus increased at the end of the composting process, indicating that the final product was proportionally richer in fatty acids of plant origin.

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“…However, their biotransformation during composting processes may be influenced by other factors, mainly temperature, oxygenation and mineral composition (Barje et al 2008). The aim of the present study was to determine qualitative and quantitative changes of hydrophobic substances, especially fatty acids, during the course of MSW composting.…”

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confidence: 98%

“…Conversely, the results of other studies indicate that fatty acids play an integral part in the formation of humic substances and are important during the creation of humic acid aliphatic structures (Amir et al 2006;Hachicha et al 2009;Lguirati et al 2005;Spaccini and Piccolo 2009). From this point of view, qualitative and quantitative changes in fatty acids during composting may be considered as chemical indices of compost maturity (Barje et al 2008;Gea et al 2007;Hachicha et al 2009;Ruggieri et al 2008).…”

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confidence: 99%

“…The most important of these are microbiological activity, temperature, pH, humidity and the nature of the macro-and microelements Barje et al 2008;Gea et al 2007). Many studies have reported the biotransformation of fats, although the intensity of their biodegradation is generally limited by unfavourable physiochemical properties, such as insolubility in water (Becker et al 1999;Lefebvre et al 1998).…”

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Changes in selected hydrophobic components during composting of municipal solid wastes

et al. 2013

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Purpose One of the most practical ways to utilise municipal solid waste is composting, thereby producing materials that may be productively used to improve soil properties. Wastes, as well as mature composts, contain hydrophobic substances, including fats, which are more resistant to microbiological decomposition than other constituents. The aim of this work was to determine qualitative and quantitative changes of hydrophobic substances, especially fatty acids, during the course of municipal solid waste composting. This provides new information on intensity of hydrophobic versus other substances decomposition undergoing during these processes. Materials and methods Raw materials, prepared according to MUT-DANO technology, were composted in a pile, and samples were taken after 1, 14, 28, 42, 56, 90 and 180 days of the composting. Temperature, moisture, total organic carbon, hydrophobic substances carbon (HSC) and fatty acid carbon (FAC) contents were determined in all samples. Hydrophobic substances were extracted with 1:2 (v/v) mixture of ethanol/benzene, while fats were extracted with petroleum ether and determined by GC analysis after transesterification with BF 3 in methanol.Results and discussion The HSC decreased from 27.8 to 9.3 g kg −1 during first 90 days of composting, and thereafter remained constant. Similarly, the highest content of FAC was in raw compost, while the lowest was after 90 days. Octadecenoic acid predominated in the raw compost and decreased from 56 to 23 % FAC after 180 days. During the composting processes, domination of octadecenoic acid was replaced by hexadecanoic and octadecanoic acids, which increased from 18.8 to 36.7 % and 8.3 to 19.4 % FAC, respectively. The share of hexadecanoic, eicosanoic and docosanoic acids increased after the thermophilic phase. The presence of odd-numbered fatty acids (pentadecanoic and heptadecanoic) was noted, which are known to be products of the bacterial transformation-synthesis of lipid substances. Conclusions The extent of decomposition of hydrophobic substances, especially fatty acids, is greater than other components in composted municipal solid waste, and intensity of the biotransformation is significantly correlated with composting parameters, mainly temperature and time. During the thermophilic phase of municipal solid waste composting, the decrease in total content of hydrophobic substances is approximately fivefold, while the reduction in fatty acids can be about tenfold. Unsaturated fatty acids are more intensively decomposed during the composting processes, while saturated fatty acids are more resistant. Moreover, transformation of fatty matter may result in the creation of specific isomers with odd numbers of carbon atoms.

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Phospholipid fatty acid analysis to monitor the co-composting process of olive oil mill wastes and organic household refuse

Cited by 21 publications

References 30 publications

Valorisation Agricole D’un Compost Produit À Partir Du Compostage En Cuve Des Déchets Municipaux

Valorisation Agricole D’un Compost Produit À Partir Du Compostage En Cuve Des Déchets Municipaux

Identification and assay of microbial fatty acids during co-composting of active sewage sludge with palm waste by TMAH-thermochemolysis coupled with GC-MS

Changes in selected hydrophobic components during composting of municipal solid wastes

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