Microbiological and physicochemical characterization of olive mill wastewaters from a continuous olive mill in Northeastern Portugal

Amaral, Carla; Lucas, Marco S.; Coutinho, João; Crespí, António L.; Anjos, Rosário; Pais, Célia

doi:10.1016/j.biortech.2007.12.058

Cited by 73 publications

(50 citation statements)

References 28 publications

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“…2). However, uninfected bulbs sprayed with OMW, showed scab-like lesions probably caused from microbial flora present in OMW (Amaral et al, 2008). Infected with B. tulipae or with B. tulipae + A. niger bulbs showed a great number of scab-like lesions with large diameter, which decreased by about 50% after the treatment with filter sterilized OMW.…”

Section: Effect Of Olive Omw On Scab-like Lesions Of Tulip Bulbsmentioning

confidence: 97%

Effect of olive mill wastewater on growth and bulb production of tulip plants infected by bulb diseases

Lykas

Vagelas

Gougoulias

2014

Span. j. agric. res.

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The effect of olive mill wastewater (OMW) on growth of tulip plants infected by common diseases as well as on their new bulbs production is analyzed in this work. Filtered and sterilized OMW was tested as growth inhibitor of Botrytis tulipae, Fusarium oxysporum, Aspergillus niger and Penicillium spp. mycelium. The effect of filtered OMW on uninfected tulip bulbs was also tested as well as on the growth of bulbs infected with the fungus B. tulipae and A. niger in vivo. The mycelium length, severity of scab-like lesions, plant height (PH), fresh mass (FM) and dry mass (DM) of plants and production of new bulbs were recorded. Only the filtered OMW inhibited the in vitro mycelium growth of all tested fungi. However filtered OMW caused infections when it sprayed on uninfected bulbs, malformations on 30% of the plants grown from these bulbs and decrease PH, FM and DM as well as new bulbs production at 75%, 72.4%, 79.1% and 50% respectively. The treatment of B. tulipae infected bulbs with filtered OMW reduced further the PH, FM, DM and the production of new bulbs in 92.1%, 81.4%, 78.7% and 97% respectively. In contrast the treatment of infected bulbs by B. tulipae + A. niger with filtered OMW did not affect PH, FM and the number of new bulbs produced and significantly improved plants DM and the mass of new bulbs.

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Section: Effect Of Olive Omw On Scab-like Lesions Of Tulip Bulbsmentioning

confidence: 97%

Effect of olive mill wastewater on growth and bulb production of tulip plants infected by bulb diseases

Lykas

Vagelas

Gougoulias

2014

Span. j. agric. res.

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“…Polyphenols are a group of aromatic secondary metabolites mainly existing in the plant's bark, roots, leaves, and fruits. They have been reported to possess multiple biological effects such as antioxidant capacity [11 -13] and antimicrobial activity [14], due to which polyphenols have received much attention in the field of pharmaceutical, biochemical, food and cosmetic industry, and so on [15].…”

Section: Introductionmentioning

confidence: 99%

Optimum extraction Process of polyphenols from the bark of Phyllanthus emblica L. based on the response surface methodology

Yang

Jiang²,

et al. 2009

J of Separation Science

146

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Original PaperOptimum extraction Process of polyphenols from the bark of Phyllanthus emblica L. based on the response surface methodology Phyllanthus emblica L. is an economic plant used in Chinese medicine for the treatment of various diseases. The bark of P. emblica is rich in polyphenols and its extractions have shown strong antioxidative and radical scavenging activity. Response surface methodology (RSM) was used to assess the optimal extraction of polyphenols from P. emblica bark. Various extraction parameters including ethanol concentration, extraction time, temperature, solid -liquid ratio, and extraction times were chosen to identify their effects on polyphenols extraction. Among these parameters, extraction times and solvent concentration were found to have significant effect on polyphenols extraction. RSM was applied to obtain the optimal combination of solvent concentration, extraction time, temperature, and extraction time for maximum rate of extraction. The most suitable condition for the extraction of polyphenols was at ethanol concentration 75%, extraction time 25 min, extraction temperature 458C, and extraction times 3. At these optimal extraction parameters, the maximum extraction of polyphenols obtained experimentally was found to be very close to its predicted value. The extraction rate of polyphenols was 19.78% at the optimum conditions. The mathematical model developed was found to fit with the experimental data of polyphenols extraction.

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“…From an environmental point of view, OMWW is an environmental emergency as it has a considerable polluting organic load, with a maximum biological oxygen demand and chemical oxygen demand of about 100 and 220 kg·m -3 , respectively, an average concentrations of volatile solids and inorganic matter of 15% and 2%, respectively, and organic matter fraction that includes sugars, tannins, polyphenols, polyalcohols, pectins and lipids [5]. Therefore, a series of studies focused on the degradation of OMWW and its chemical components [5][6][7][8], and many authors used specific microorganisms for OMWW treatment [9][10][11][12][13]. Microbiological and physicochemical parameters were used as indicators to study the kinetic of OMWW biodegradation, such as chemical oxygen demand (COD), dissolved organic carbon, counts of heterotrophs, filamentous fungi, and yeasts, and content of K, P and N [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Assessment of microbial pools by an innovative microbiological technique during the co-composting of olive mill by-products

Casacchia¹,

Toscano²,

Sofo³

et al. 2011

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Different mixtures of olive pomace (OP), olive mill wastewater (OMWW) and olive pruning residues (OPR) were aerobically co-composted under natural conditions. Compost temperature showed a sharp increase in the first 40 -60 days, followed by a stabilization at 60°C and a decline after 150 days, whereas compost water content ranged from 50% -55% to 25% -30%. Total and selective microbial counts were followed throughout the experiment by means of innovative (IMT) and conventional (CMT) microbiological techniques. Pseudomonas spp., anaerobic bacteria, actinomycetes, and fungi reached levels of 8, 7, 5 and 6 log CFU g -1 compost, respectively, with a slight depression after 30-80 days. Total and fecal coliforms strongly decreased during the composting process. The use of IMT allowed to detect a higher and more stable growth of microorganisms if compared to CMT. IMT was demonstrated to be an appropriate and reliable method for monitoring the microbial pools during the co-composting process.

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Microbiological and physicochemical characterization of olive mill wastewaters from a continuous olive mill in Northeastern Portugal

Cited by 73 publications

References 28 publications

Effect of olive mill wastewater on growth and bulb production of tulip plants infected by bulb diseases

Effect of olive mill wastewater on growth and bulb production of tulip plants infected by bulb diseases

Optimum extraction Process of polyphenols from the bark of Phyllanthus emblica L. based on the response surface methodology

Assessment of microbial pools by an innovative microbiological technique during the co-composting of olive mill by-products

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