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Melloni R, Cardoso EJBN. Microbiome Associated with Olive Cultivation: A Review. PLANTS (BASEL, SWITZERLAND) 2023; 12:897. [PMID: 36840245 PMCID: PMC9963204 DOI: 10.3390/plants12040897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/06/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
International research has devoted much effort to the study of the impacts caused to the soil by different management practices applied to olive cultivation. Such management involves techniques considered conventional, including the control of spontaneous plants with herbicides or machines, inorganic fertilizers, and pesticides to control pests and diseases. Equally, some producers use sustainable techniques, including drastic pruning, the use of cultivars that are tolerant to diseases and adverse climates, the use of organic conditioners in the soil, the maintenance of vegetation cover with spontaneous plants, and the use of inoculants, among others. In both conventional and sustainable/organic management, the effects on soil quality, crop development, and production are accessed through the presence, activity, and/or behavior of microorganisms, microbial groups, and their processes in the soil and/or directly in the crop itself, such as endophytes and epiphytes. Thus, our present review seeks to assemble research information, not only regarding the role of microorganisms on growth and development of the olive tree (Olea europaea L.). We looked mainly for reviews that reveal the impacts of different management practices applied in countries that produce olive oil and olives, which can serve as a basis and inspiration for Brazilian studies on the subject.
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Affiliation(s)
- Rogério Melloni
- Institute of Natural Research, Federal University of Itajubá (Unifei), Itajubá 37500-903, MG, Brazil
| | - Elke J. B. N. Cardoso
- Luiz de Queiroz College of Agriculture, University of São Paulo (Esalq/USP), Piracicaba 13418-260, SP, Brazil
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2
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Alaoui SB, Lamy E, Achak M. Assessment of the impact of diluted and pretreated olive mill wastewater on the treatment efficiency by infiltration-percolation using natural bio-adsorbents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16305-16320. [PMID: 36181593 DOI: 10.1007/s11356-022-23373-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
The current study was carried out to treat the olive mill wastewater (OMW) via infiltration percolation process, using low-cost natural adsorbents that could improve the ability of the system to enhance the disposal rate of elimination of pollutant from the OMW. The experimental pilot was composed of three PVC (polyvinyl chloride) columns with 10 cm in diameter and 110-cm height equipped with lateral air entries. Each column was filled with four layers of 10 cm of a mixture of sand (70%), charcoal (20%) and sawdust (10%) respectively. These layers were alternated by four permeable layers of 10 cm of Pouzzolane. To assess the effect of the pretreatment on the efficiency of the system, three types of OMW were used: raw OMW, diluted OMW with domestic wastewater at 1/1(v/v) ratio and OMW pretreated with lime. For the column feed with raw OMW, an average removal of total COD (41%), dissolved COD (54%), NH4-N (40.25%), NO3- (15.76%), total phosphorus (55.63%) and orthophosphate (50.84%) was recorded. The results showed that the column feed with diluted OMW with domestic wastewater was the most efficient one with a removal rate that reached 93.2% of total COD, 86.2% of dissolved COD, 92% of polyphenol, 92% of orthophosphate (OP), 97.2% of total phosphorus (TP) and 81% of NH4-N. The pretreatment of OMW with lime gave the lowest removal rate for all the parameters: total COD (34%), dissolved COD (50%), NH4-N (30%), NO3- (- 21%), total phosphorus (15.19%) and orthophosphate (9.04%). This study demonstrated that the dilution is a way to optimize the efficiency of the system of infiltration-percolation in treating the OMW.
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Affiliation(s)
- Soufiane Bakri Alaoui
- Science Engineer Laboratory for Energy (LabSIPE), National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco
- Integrated Transformations of Renewable Matter (TIMR), Sorbonne University, University of Technology of Compiègne, UTC/ESCOM, EA 4297 TIMR, Compiègne, France
| | - Edvina Lamy
- Integrated Transformations of Renewable Matter (TIMR), Sorbonne University, University of Technology of Compiègne, UTC/ESCOM, EA 4297 TIMR, Compiègne, France
| | - Mounia Achak
- Science Engineer Laboratory for Energy (LabSIPE), National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco.
- Chemical and Biochemical Sciences, Green Process Engineering, Mohammed VI Polytechnic University (UM6P), Benguerir, Morocco.
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3
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Musolino V, Macrì R, Cardamone A, Serra M, Coppoletta AR, Tucci L, Maiuolo J, Lupia C, Scarano F, Carresi C, Nucera S, Bava I, Marrelli M, Palma E, Gliozzi M, Mollace V. Nocellara Del Belice ( Olea europaea L. Cultivar): Leaf Extract Concentrated in Phenolic Compounds and Its Anti-Inflammatory and Radical Scavenging Activity. PLANTS (BASEL, SWITZERLAND) 2022; 12:27. [PMID: 36616158 PMCID: PMC9824270 DOI: 10.3390/plants12010027] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/07/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Olea europaea L. is a plant belonging to the Oleaceae family, widely grown around the Mediterranean Basin and its leaves are a source of phenolic compounds with antioxidant and anti-inflammatory capacity. Among these, oleuropein and luteolin-7-O-glucoside represent two major polyphenolic compounds in olive-leaf extract. Herein, a polystyrene resin was used to recover the polyphenolic fraction from the acetone-water leaf extract from Nocellara del Belice cultivar, which showed the higher level of analysed bioactive compounds, compared to Carolea cultivar. The antioxidant activity of the extract concentrated in phenolic compounds (OLECp) was evaluated through a classical assay and electron paramagnetic resonance (EPR) for DPPH and hydroxyl radicals scavenging. Thus, the anti-inflammatory activity and the potential beneficial effects in reducing lipid accumulation in an in vitro model of NAFLD using McA-RH7777 cells exposed to oleic acid (OA) were evaluated. Nile Red and Oil Red O have been used to stain the lipid accumulation, while the inflammatory status was assessed by Cytokines Bioplex Assay. OLECp (TPC: 92.93 ± 9.35 mg GAE/g, TFC: 728.12 ± 16.04 mg RE/g; 1 g of extract contains 315.250 mg of oleuropein and 17.44 mg of luteolin-7-O-glucoside) exerted a good radical scavenging capability (IC50: 2.30 ± 0.18 mg/mL) with a neutralizing power against DPPH and hydroxyl radicals, as confirmed by the decreased signal area of the EPR spectra. Moreover, OLECp at concentration of 25, 50 and 100 μg/mL counteracted the intracellular inflammatory status, as result of decreased intracellular lipid content. Our results highlighted the multiple properties and applications of an O. europaea extract concentrated in polyphenols, and the possibility to formulate novel nutraceuticals with antioxidant properties, destined to ameliorate human health.
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Affiliation(s)
- Vincenzo Musolino
- Laboratory of Pharmaceutical Biology, Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Roberta Macrì
- Laboratory of Pharmaceutical Biology, Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Antonio Cardamone
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Maria Serra
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Anna Rita Coppoletta
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Luigi Tucci
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Jessica Maiuolo
- Laboratory of Pharmaceutical Biology, Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Carmine Lupia
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Federica Scarano
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Cristina Carresi
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Saverio Nucera
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Irene Bava
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Mariangela Marrelli
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy
| | - Ernesto Palma
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Micaela Gliozzi
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
| | - Vincenzo Mollace
- Department of Health Sciences, Institute of Research for Food Safety & Health IRC-FSH, University “Magna Græcia” of Catanzaro, 88100 Catanzaro, Italy
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4
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Grzelczyk J, Oracz J, Gałązka-Czarnecka I. Quality Assessment of Waste from Olive Oil Production and Design of Biodegradable Packaging. Foods 2022; 11:3776. [PMID: 36496585 PMCID: PMC9740201 DOI: 10.3390/foods11233776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022] Open
Abstract
The use of olive pomace from olive oil production is still insufficient. The lingering olive pomace is harmful to the environment. On the other hand, the world is increasingly polluted with plastic or by-products from the production of biodegradable products. Considering these two problems, the aim of this work was to develop a mixture and create biodegradable disposable tableware characterized by high antioxidant activity. The disposable tableware was made by mixing olive pomace with teff flour or/and sorghum groats and lecithin. Baking was carried out at the temperature of 180 °C. The best variant of the mixture for the preparation of disposable tableware was olive pomace, teff flour, sorghum groats and lecithin. These vessels were the toughest, with low water absorption and had a high antioxidant potential due to the high content of polyphenols and omega acids. Protecting the cups and bowls with beeswax had a positive effect on reducing water absorption.
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Affiliation(s)
- Joanna Grzelczyk
- Institute of Food Technology and Analysis, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, 90-537 Lodz, Poland
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5
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Jiang L, Chu YX, Zhang X, Wang J, He X, Liu CY, Chen T, He R. Characterization of anaerobic oxidation of methane and microbial community in landfills with aeration. ENVIRONMENTAL RESEARCH 2022; 214:114102. [PMID: 35973464 DOI: 10.1016/j.envres.2022.114102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 08/04/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Landfills are the third largest source of anthropogenic CH4 emissions. Anaerobic oxidation of methane (AOM) activity and communities of methane-oxidizing bacteria were investigated in three informal landfills in this study, namely, BJ, CH and SZ landfills, among which BJ and CH represent traditional anaerobic landfills, while the SZ landfill was subjected to aeration to accelerate waste stabilization. The AOM rates of the investigated landfilled wastes ranged from 3.66 to 23.91 nmol g-1 h-1. Among the three landfills, the AOM rate was highest in the SZ-1-Top sample, which was closest to the aeration pipe. Among the possible electron acceptors for AOM, including NO3-, NO2-, SO42- and Fe3+, the NO2--N content was the only variable that was positively correlated with the AOM rate. Compared with α-Proteobacteria methanotrophs, γ-Proteobacteria methanotrophs were more abundant in the landfilled waste, especially Methylobacter, which was detected in nearly all samples. Members of the family Methylomirabilaceae, including Candidatus Methylomirabilis, were also detected in the SZ-1 and SZ-2-Bot samples. The relative abundance of the main methanotrophs in the families Methylomonadaceae, Methylococcaceae, Rokubacteriales and Methylomirabilaceae, the genus Methylocystis and the phylum NC10 were all positive correlations with the contents of NO2--N in the landfilled waste samples. Additionally, significantly positive correlations were observed between the AOM rates and the relative abundance of the main methanotrophs except for the family Methylococcaceae. This indicated that aeration could enhance the conversion of nitrogen compounds in the landfilled waste, in which the high contents of NO2--N could stimulate the growth of methanotrophs and increase AOM rate. These findings are helpful for understanding the mechanisms of CH4 oxidation in landfills and for taking effective measures to mitigate CH4 emissions from landfills.
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Affiliation(s)
- Lei Jiang
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Yi-Xuan Chu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Xuan Zhang
- Eco-Environmental Science and Research Institute of Zhejiang Province, Hangzhou, 310061, China
| | - Jing Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Xiaosong He
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Chen-Yang Liu
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Ting Chen
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China
| | - Ruo He
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
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6
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Martínez-Gallardo MR, Jurado MM, López-González JA, Toribio A, Suárez-Estrella F, Sáez JA, Moral R, Andreu-Rodríguez FJ, López MJ. Biorecovery of olive mill wastewater sludge from evaporation ponds. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 319:115647. [PMID: 35803069 DOI: 10.1016/j.jenvman.2022.115647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 06/27/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Olive mill wastewater (OMW) resulting from the olive oil extraction process is usually disposed of in evaporation ponds where it concentrates generating a sludge that pollutes the ponds nearby area. In this study, four bio-treatments were applied for the in-situ bioremediation and valorization of OMW sludge: Landfarming, phytoremediation, composting and vermicomposting. In all cases, the OMW sludge was added with organic residues (mushroom compost, rabbit manure, and chicken manure). The bio-treatments were carried out in duplicate, inoculated and non-inoculated, to determine the effect of a specialized fungal consortium (Aspergillus ochraceus H2 and Scedosporium apiospermum H16) on the efficacy of the bio-treatments. The evaluation of chemical parameters, toxicity, and functional microbial biodiversity revealed that the four techniques depleted the toxicity and favored the stimulation of functional microbiota. Landfarming and phytoremediation allowed the decontamination and improvement of soils. Composting and vermicomposting also offered high-quality products of agronomic interest. Inoculation improved the bioremediation effectiveness. Biological treatments are effective for the safe recovery of contaminated OMW sludge into high-quality services and products.
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Affiliation(s)
- M R Martínez-Gallardo
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain.
| | - M M Jurado
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - J A López-González
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - A Toribio
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - F Suárez-Estrella
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - J A Sáez
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - R Moral
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - F J Andreu-Rodríguez
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - M J López
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence ceiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
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7
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Evolution of the Olive Oil Industry along the Entire Production Chain and Related Waste Management. ENERGIES 2022. [DOI: 10.3390/en15020465] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The production of olive oil involves the sustainable management of the waste produced along the entire production chain. This review examines the developments regarding cultivation techniques, production technologies, and waste management, highlighting the goals to be achieved and the most reasonable prospects. The results show that cultivation and production technology have evolved to an almost final solution to meet economic feasibility, keeping the oil’s high quality. Continuous horizontal decanters will coexist with traditional mills in many countries with old olive oil production and consumption traditions. High-quality products have conquered markets, especially in the wealthiest countries. At the same time, the exploitation of dried pomace by solvent extraction is increasingly an obsolete practice. However, waste management is still looking for one or a few reasonable solutions that meet modern society’s constraints. The enhancement of some experienced technologies and the full-scale application of emerging technologies and strategies should solve this problem in the short–medium term. A short discussion is reported on the possibility of unifying the nature and the quality of the waste, whatever the olive oil production method is. Furthermore, modern thermochemical treatment for solid wet organic waste disposal is examined and discussed.
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8
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Kang YR, Su Y, Wang J, Chu YX, Tian G, He R. Effects of different pretreatment methods on biogas production and microbial community in anaerobic digestion of wheat straw. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:51772-51785. [PMID: 33990921 DOI: 10.1007/s11356-021-14296-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
The pretreatment of wheat straw has been recognized to be an essential step prior to anaerobic digestion, owing to the high abundance of lignocellulosic materials. In order to choose economical and effective techniques for the disposal of wheat straw, effects of five pretreatment methods including acid, alkali, co-pretreatment of acid and alkali, CaO2, and liquid digestate of municipal sewage sludge on anaerobic digestion of wheat straw were investigated by analyzing biogas production and organic matter degradation in the study. The results showed that among these pretreatment methods, the methane yield was highest in the liquid digestate pretreated-wheat straw with 112.6 mL gTS-1, followed by the acid, alkali, and CaO2 pretreatments, and the lowest was observed in the co-pretreatment of acid and alkali. Illumina MiSeq sequencing of the microbial communities in the anaerobic digesters revealed that the genera Ruminiclostridium including Ruminiclostridium and Ruminiclostridium 1, Hydrogenispora, and Capriciproducens were the main hydrolytic bacteria, acidogenic bacteria, and acetogenic bacteria, respectively, in the anaerobic digesters. Capriciproducens and Hydrogenispora dominated in the first and the later stages, respectively, in the anaerobic digesters, which could work as indicators of the anaerobic co-digestion stage of sludge and wheat straw. The total solid and SO42--S contents of the solid digestate and the NH4+-N concentration of the liquid digestate had a significant influence on the microbial community in the digesters. These findings indicated that liquid digestate pretreatment was a potential option to improve the anaerobic digestion of wheat straw, due to the low cost without additional chemical agents.
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Affiliation(s)
- Ya-Ru Kang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yao Su
- Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jing Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Yi-Xuan Chu
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Guangming Tian
- Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Ruo He
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
- College of Environmental and Resource Science, Zhejiang University, Hangzhou, 310058, China.
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Kefalogianni I, Skiada V, Tsagou V, Efthymiou A, Xexakis K, Chatzipavlidis I. Co-composting of cotton residues with olive mill wastewater: process monitoring and evaluation of the diversity of culturable microbial populations. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:641. [PMID: 34508322 DOI: 10.1007/s10661-021-09422-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
With the aim to recommend an integrated alternative for the combined treatment of olive mill wastewater (OMW) and cotton residues (CR), and the production of high value and environmentally friendly products, two compost piles were set up. The first pile (control, pile 1) consisted of ginned CR, whereas the second (pile 2) was made of CR with the addition of OMW. A series of physicochemical parameters and the culturable microbial diversity in both piles were assessed. Co-composting (pile 2) displayed higher temperatures during the whole process, a prolonged second thermophilic phase and temperature values higher than 40 °C even after the thermophilic stage. Comparing the physicochemical parameters of the pile 2 with those of the pile 1, it was deduced that pH in the former was more acidic during the onset of the process; the EC values were higher throughout the process, while the levels of ammonium and nitrate nitrogen, as well as the NH4+/NO3- ratios, were lower at most of the sampling dates. By evaluating the abovementioned results, it was estimated that the co-composting process headed sooner toward stability and maturity, Isolated microorganisms from both piles were identified as members of the genera Brevibacillus, Serratia, Klebsiella, and Aspergillus, whereas active thermotolerant diazotrophs were detected in both piles at the 2nd thermophilic phase emerging a promising prospect upon further evaluation for enhancing the end-product quality. Our findings indicate that co-composting is an interesting approach for the exploitation of large quantities of agro-industrial residues with a final product suitable for improving soil fertility and health.
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Affiliation(s)
- Io Kefalogianni
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 75 Iera Odos, 11855, Athens, Greece
| | - Vasiliki Skiada
- Department of Natural Resources Management and Agricultural Engineering, Division of Soil Science and Agricultural Chemistry, Agricultural University of Athens, 75 Iera Odos, 11855, Athens, Greece
| | - Vasiliki Tsagou
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 75 Iera Odos, 11855, Athens, Greece
| | - Aikaterini Efthymiou
- Department of Plant and Environmental Science, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg, Denmark
| | - Konstantinos Xexakis
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 75 Iera Odos, 11855, Athens, Greece
| | - Iordanis Chatzipavlidis
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 75 Iera Odos, 11855, Athens, Greece.
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10
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Olive Mill Wastewater as Renewable Raw Materials to Generate High Added-Value Ingredients for Agro-Food Industries. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11167511] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Olive oil production represents an agro-industrial activity of vital economic importance for many Mediterranean countries. However, it is associated with the generation of a huge amount of by-products, both in solid and liquid forms, mainly constituted by olive mill wastewater, olive pomace, wood, leaves, and stones. Although for many years olive by-products have only been considered as a relevant environmental issue, in the last decades, numerous studies have deeply described their antioxidant, anti-inflammatory, immunomodulatory, analgesic, antimicrobial, antihypertensive, anticancer, anti-hyperglycemic activities. Therefore, the increasing interest in natural bioactive compounds represents a new challenge for olive mills. Studies have focused on optimizing methods to extract phenols from olive oil by-products for pharmaceutical or cosmetic applications and attempts have been made to describe microorganisms and metabolic activity involved in the treatment of such complex and variable by-products. However, few studies have investigated olive oil by-products in order to produce added-value ingredients and/or preservatives for food industries. This review provides an overview of the prospective of liquid olive oil by-products as a source of high nutritional value compounds to produce new functional additives or ingredients and to explore potential and future research opportunities.
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11
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Olive Mill and Olive Pomace Evaporation Pond’s By-Products: Toxic Level Determination and Role of Indigenous Microbiota in Toxicity Alleviation. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11115131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Diverse vegetable oils are extracted from oleagenic trees and plants all over the world. In particular, olive oil represents a strategic socio-economic branch in the Mediterranean countries. These countries use either two or three-phase olive oil extraction systems. In this work, we focus on the by-products from three-phase olive oil extraction, which are the liquid olive mill wastewater (OMW) and the solid olive mill pomace (OMP) rejected in evaporative ponds. The disposal of this recalcitrant waste poses environmental problems such as the death of different species of insects and animals. In-depth ICP-OES analysis of the heavy metal composition of OMW and OMP revealed the presence of many metals ranging from non-toxic to highly toxic. The LC-HRMS characterization of these by-products indicated the presence of several secondary metabolites harmful to humans or to the environment. Thus, we aimed to identify OMW and OMP indigenous microbiota through metagenomics. The bacterial population was dominated by the Acetobacter (49.7%), Gluconobacter (17.3%), Gortzia (13.7%) and Nardonalla (5.3%) genera. The most abundant fungal genera were Nakazawaea, Saccharomyces, Lachancea and Candida. These microbial genera are responsible for OMW, OMP and soil toxicity alleviation.
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Melo MM, Dos Reis KC, Pires JF, das Neves TT, Schwan RF, Silva CF. Bio-hydrolysis of used soybean oil: environmental-friendly technology using microbial consortium. Biodegradation 2021; 32:551-562. [PMID: 34046776 DOI: 10.1007/s10532-021-09951-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 05/15/2021] [Indexed: 11/29/2022]
Abstract
In this work, strains of Bacillus subtilis were inoculated in consortium with Rhodotorula mucilaginosa into spent soy oil as aiming to biological treatment and low-cost reuse. The microorganisms were previously isolated and selected for the lipolytic capacity of the alperujo residue generated during the processing of olive oil. For fermentation, bioassays containing Rhodotorula mucilaginosa isolated from alperujo and Candida rugosa CCMA 00371, both co-inoculated with Bacillus subtilis CCMA 0085 in medium containing (% w/v) 0.075 glucose and 0.375 (NH4)3 PO4 in 75 mL of water and 75 mL of spent soy oil. Despite the low biomass productivity, it has favorable characteristics to be used in animal feed supplementation. Spent soy oil was used as a carbon source proven by Bartha respirometer. The strains of R. mucilaginosa UFLA RAS 144 and B. subtilis CCMA 0085 are promising inoculants for oil degradation and can be applied in a waste treatment system.
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Affiliation(s)
- Marcela Magalhães Melo
- Department of Biology, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil
| | - Kelly Cristina Dos Reis
- Department of Hydraulic and Environmental Engineering, Federal University of Ceará, Fortaleza, CE, 60455-900, Brazil
| | - Josiane Ferreira Pires
- Department of Biology, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil
| | | | - Rosane Freitas Schwan
- Department of Biology, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil
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Gallego S, Esbrí JM, Campos JA, Peco JD, Martin-Laurent F, Higueras P. Microbial diversity and activity assessment in a 100-year-old lead mine. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124618. [PMID: 33250311 DOI: 10.1016/j.jhazmat.2020.124618] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/09/2020] [Accepted: 11/14/2020] [Indexed: 06/12/2023]
Abstract
Mining activities frequently leave a legacy of residues that remain in the area for long periods causing the pollution of surroundings. We studied on a 100 year-old mine, the behavior of potentially toxic elements (PTEs) and their ecotoxicological impact on activity and diversity of microorganisms. The PTEs contamination assessment allowed the classification of the materials as highly (reference- and contaminated-samples) and very highly polluted (illegal spill of olive mill wastes (OMW), tailings, and dumps). OMW presented the lowest enzymatic activities while tailings and dumps had low dehydrogenase and arylsulfatase activities. All the α-diversity indices studied were negatively impacted in dumps. Tailings had lower Chao1 and PD whole tree values as compared to those of reference-samples. β-diversity analysis showed similar bacterial community composition for reference- and contaminated-samples, significantly differing from that of tailings and dumps. The relative abundance of Gemmatimonadetes, Bacteroidetes, and Verrucomicrobia was lower in OMW, tailings, and dumps as compared to reference-samples. Fifty-seven operational taxonomic units were selected as responsible for the changes observed between samples. This study highlights that assessing the relationship between physicochemical properties and microbial diversity and activity gives clues about ongoing regulating processes that can be helpful for stakeholders to define an appropriate management strategy.
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Affiliation(s)
- Sara Gallego
- AgroSup Dijon, INRAE, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Agroécologie, Dijon, France.
| | - José María Esbrí
- Instituto de Geología Aplicada, IGeA, Universidad de Castilla-La Mancha, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain; Escuela de Ingeniería Minera e Industrial de Almadén, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain
| | - Juan Antonio Campos
- Instituto de Geología Aplicada, IGeA, Universidad de Castilla-La Mancha, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain; Escuela de Ingenieros Agrónomos, Universidad de Castilla-La Mancha, Ronda de Calatrava, 7, 13071 Ciudad Real, Spain
| | - Jesús Daniel Peco
- Instituto de Geología Aplicada, IGeA, Universidad de Castilla-La Mancha, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain; Escuela de Ingenieros Agrónomos, Universidad de Castilla-La Mancha, Ronda de Calatrava, 7, 13071 Ciudad Real, Spain
| | - Fabrice Martin-Laurent
- AgroSup Dijon, INRAE, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Agroécologie, Dijon, France
| | - Pablo Higueras
- Instituto de Geología Aplicada, IGeA, Universidad de Castilla-La Mancha, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain; Escuela de Ingeniería Minera e Industrial de Almadén, Plaza de Manuel Meca, 1, 13400 Almadén, Ciudad Real, Spain
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de Oliveira CO, Roll AAP, Medeiros Gonçalves FM, Lopes DCN, Xavier EG. Olive pomace for the feeding of commercial poultry: effects on performance, meat and eggs quality, haematological parameters, microbiota and immunity. WORLD POULTRY SCI J 2021. [DOI: 10.1080/00439339.2021.1894409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- C. O. de Oliveira
- Department of Animal Science, Federal University of Pelotas, Pelotas, Brazil
| | - A. A. P. Roll
- Department of Animal Science, Federal University of Pelotas, Pelotas, Brazil
| | | | - D. C. N. Lopes
- Department of Animal Science, Federal University of Pelotas, Pelotas, Brazil
| | - E. G. Xavier
- Department of Animal Science, Federal University of Pelotas, Pelotas, Brazil
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Martínez-Gallardo MR, López MJ, López-González JA, Jurado MM, Suárez-Estrella F, Pérez-Murcia MD, Sáez JA, Moral R, Moreno J. Microbial communities of the olive mill wastewater sludge stored in evaporation ponds: The resource for sustainable bioremediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 279:111810. [PMID: 33341726 DOI: 10.1016/j.jenvman.2020.111810] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 11/11/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
Olive Mill Wastewater (OMW) is a polluting residue from the olive oil industry. It is usually stored in open-air unprotected evaporation ponds where their sediments accumulate. This study compares the characteristics of OMW sludges stored for long-time in evaporation ponds and assesses their impact on the underlying soil layer. Physicochemical parameters, toxicity bioassays, and full characterization of the microbial community were analyzed. The extension of the polluting effects was assessed by analysis of toxicity, microbial biomass carbon, and respiration. Geostatistics was used to predict their spatial distribution. Organic matter and polyphenol content besides toxicity levels determine variations between OMW sludges and have a high impact on the microbiota they contain. The microbial community was abundant, diverse, and functionally active. However, the biodegradability of the sludges was hindered by the toxicity levels. Toxicity and biomass carbon were higher on the surface of the ponds than in the soil layer revealing a reduced leach flow and depletion of contaminants. The natural microbiota might be biostimulated by means of applying sustainable and feasible biological treatments in order to favor the OMW sludges bioremediation. These results open up the possibility of solving the environmental concern caused by its storage in similar scenarios, which are common in olive oil-producing countries.
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Affiliation(s)
- María R Martínez-Gallardo
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - María J López
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain.
| | - Juan A López-González
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - Macarena M Jurado
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - Francisca Suárez-Estrella
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
| | - María D Pérez-Murcia
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - José A Sáez
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - Raúl Moral
- Department of Agrochemistry and Environment, Miguel Hernández University, EPS-Orihuela, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain
| | - Joaquín Moreno
- Unit of Microbiology, Department of Biology and Geology, CITE II-B, Agrifood Campus of International Excellence CeiA3, CIAIMBITAL, University of Almeria, 04120, Almeria, Spain
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Kasirajan L, Maupin-Furlow JA. Halophilic archaea and their potential to generate renewable fuels and chemicals. Biotechnol Bioeng 2020; 118:1066-1090. [PMID: 33241850 DOI: 10.1002/bit.27639] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/27/2020] [Accepted: 11/17/2020] [Indexed: 12/16/2022]
Abstract
Lignocellulosic biofuels and chemicals have great potential to reduce our dependence on fossil fuels and mitigate air pollution by cutting down on greenhouse gas emissions. Chemical, thermal, and enzymatic processes are used to release the sugars from the lignocellulosic biomass for conversion to biofuels. These processes often operate at extreme pH conditions, high salt concentrations, and/or high temperature. These harsh treatments add to the cost of the biofuels, as most known biocatalysts do not operate under these conditions. To increase the economic feasibility of biofuel production, microorganisms that thrive in extreme conditions are considered as ideal resources to generate biofuels and value-added products. Halophilic archaea (haloarchaea) are isolated from hypersaline ecosystems with high salt concentrations approaching saturation (1.5-5 M salt concentration) including environments with extremes in pH and/or temperature. The unique traits of haloarchaea and their enzymes that enable them to sustain catalytic activity in these environments make them attractive resources for use in bioconversion processes that must occur across a wide range of industrial conditions. Biocatalysts (enzymes) derived from haloarchaea occupy a unique niche in organic solvent, salt-based, and detergent industries. This review focuses on the use of haloarchaea and their enzymes to develop and improve biofuel production. The review also highlights how haloarchaea produce value-added products, such as antibiotics, carotenoids, and bioplastic precursors, and can do so using feedstocks considered "too salty" for most microbial processes including wastes from the olive-mill, shell fish, and biodiesel industries.
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Affiliation(s)
- Lakshmi Kasirajan
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA.,Division of Crop Improvement, ICAR Sugarcane Breeding Institute, Coimbatore, India
| | - Julie A Maupin-Furlow
- Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida, USA.,Genetics Institute, University of Florida, Gainesville, Florida, USA
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Olive Mill Wastes: A Source of Bioactive Molecules for Plant Growth and Protection against Pathogens. BIOLOGY 2020; 9:biology9120450. [PMID: 33291288 PMCID: PMC7762183 DOI: 10.3390/biology9120450] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/28/2022]
Abstract
Simple Summary Olive oil is the most common vegetable oil used for human nutrition, and its production represents a major economic sector in Mediterranean countries. The milling industry generates large amounts of liquid and solid residues, whose disposal is complicated and costly due to their polluting properties. However, olive mill waste (OMW) may also be seen as a source of valuable biomolecules including plant nutrients, anthocyanins, flavonoids, polysaccharides, and phenolic compounds. This review describes recent advances and multidisciplinary approaches in the identification and isolation of valuable natural OMW-derived bioactive molecules. Such natural compounds may be potentially used in numerous sustainable applications in agriculture such as fertilizers, biostimulants, and biopesticides in alternative to synthetic substances that have a negative impact on the environment and are harmful to human health. Abstract Olive oil production generates high amounts of liquid and solid wastes. For a long time, such complex matrices were considered only as an environmental issue, due to their polluting properties. On the other hand, olive mill wastes (OMWs) exert a positive effect on plant growth when applied to soil due to the high content of organic matter and mineral nutrients. Moreover, OMWs also exhibit antimicrobial activity and protective properties against plant pathogens possibly due to the presence of bioactive molecules including phenols and polysaccharides. This review covers the recent advances made in the identification, isolation, and characterization of OMW-derived bioactive molecules able to influence important plant processes such as plant growth and defend against pathogens. Such studies are relevant from different points of view. First, basic research in plant biology may benefit from the isolation and characterization of new biomolecules to be potentially applied in crop growth and protection against diseases. Moreover, the valorization of waste materials is necessary for the development of a circular economy, which is foreseen to drive the future development of a more sustainable agriculture.
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Pourkhanali K, Khayati G, Mizani F, Raouf F. Isolation, identification and optimization of enhanced production of laccase from Galactomyces geotrichum under solid-state fermentation. Prep Biochem Biotechnol 2020; 51:659-668. [PMID: 33269956 DOI: 10.1080/10826068.2020.1848867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Laccases are a group of oxidases that catalyze the oxidation of a wide range of electron rich substrates like phenolic compounds, lignin and aromatic amines. They are of interest because of their potential to be used in environmental and industrial applications. In this research, potent laccase producer fungi were screened and isolated from olive mill wastewater (OMW). One of the 23 isolated fungi was identified as Galactomyces geotrichum based on 18S rDNA sequence analysis that detected good laccase activity. Produced laccase had a molecular weight of 55 kDa that was confirmed by zymogram analysis. This is the first report about the optimization of laccase Production by G. geotrichum under solid-state fermentation. The optimization was made by the Taguchi design of experiments (DOE) methodology. An orthogonal array (L25) was designed using Minitab 19 software to study four effective process factors in five levels for laccase production. The optimum condition derived was; moisture content (80%), fermentation time (14 day), CuSO4⋅5H2O as the inducer (300 μM), glucose as a co-substrate (5 g/L). Maximum laccase activity of 52.86 (U/g of dry substrate) was obtained using optimum fermentation condition. This study aimed to better understand the laccase producing microorganisms in OMW and take them to OMW treatment that is rich in phenolic compounds.
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Affiliation(s)
- Khadijeh Pourkhanali
- Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
| | - Gholam Khayati
- Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
| | - Farhang Mizani
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - Fereshteh Raouf
- Department of Chemical Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
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Influence of Pomace Matrix and Cyclodextrin Encapsulation on Olive Pomace Polyphenols' Bioaccessibility and Intestinal Permeability. Nutrients 2020; 12:nu12030669. [PMID: 32121413 PMCID: PMC7146296 DOI: 10.3390/nu12030669] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/20/2020] [Accepted: 02/25/2020] [Indexed: 02/06/2023] Open
Abstract
Olive pomace is a rich source of biologically active compounds, mainly polyphenols. Recently, an efficient and sustainable cyclodextrin (CD)-enhanced extraction was developed. It enabled a relatively simple formulation of high-quality olive pomace extracts (OPEs) that can be used as alternative sources of olive-derived polyphenols in the nutrition and pharma industries. However, biological effects and nutraceutical potential of OPEs are primarily limited by generally low oral bioavailability of major polyphenols (hydroxytyrosol and its derivatives) that can be significantly influenced by OPE matrix and the presence of CDs in formulation. The major goal of this research was to investigate the impact of complex matrix and different types of CDs on gastrointestinal stability and intestinal permeability of major OPE polyphenols, and provide additional data about mechanisms of absorption and antioxidant activity in gut lumen. Obtained results showed high bioaccessibility but relatively low permeability of OPE polyphenols, which was negatively affected by OPE matrix. CDs improved antioxidant efficiency of tested OPEs and tyrosol gastrointestinal stability. Effects of CDs on permeability and the metabolism of particular OPE polyphenols were CD- and polyphenol-specific.
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Tortosa G, Torralbo F, Maza-Márquez P, Aranda E, Calvo C, González-Murua C, Bedmar EJ. Assessment of the diversity and abundance of the total and active fungal population and its correlation with humification during two-phase olive mill waste (''alperujo") composting. BIORESOURCE TECHNOLOGY 2020; 295:122267. [PMID: 31648128 DOI: 10.1016/j.biortech.2019.122267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/10/2019] [Accepted: 10/12/2019] [Indexed: 05/22/2023]
Abstract
Metagenomic and transcriptomic techniques applied to composting could increase our understanding of the overall microbial ecology and could help us to optimise operational conditions which are directly related with economic interest. In this study, the fungal diversity and abundance of two-phase olive mill waste ("alperujo") composting was studied using Illumina MiSeq sequencing and quantitative PCR, respectively. The results showed an increase of the fungal diversity during the process, with Ascomycota being the predominant phylum. Penicillium was the main genera identified at the mesophilic and maturation phases, with Debaryomyces and Sarocladium at the thermophilic phase, respectively. The fungal abundance was increased during composting, which confirms their important role during thermophilic and maturation phases. Some Basidiomycota showed an increased during the process, which showed a positive correlation with the humification parameters. According to that, the genus Cystofilobasidium could be used as a potential fungal biomarker to assess alperujo compost maturation.
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Affiliation(s)
- Germán Tortosa
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, c/Profesor Albareda, 1, 18008 Granada, Spain
| | - Fernando Torralbo
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena, s/n, 48940 Leioa, Bizkaia, Spain
| | - Paula Maza-Márquez
- Institute of Water Research, University of Granada, Edificio Fray Luis, c/Ramón y Cajal, 4, 18071 Granada, Spain; Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus de Cartuja, s/n, 18071 Granada, Spain
| | - Elisabet Aranda
- Institute of Water Research, University of Granada, Edificio Fray Luis, c/Ramón y Cajal, 4, 18071 Granada, Spain; Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus de Cartuja, s/n, 18071 Granada, Spain.
| | - Concepción Calvo
- Institute of Water Research, University of Granada, Edificio Fray Luis, c/Ramón y Cajal, 4, 18071 Granada, Spain; Department of Microbiology, Faculty of Pharmacy, University of Granada, Campus de Cartuja, s/n, 18071 Granada, Spain
| | - Carmen González-Murua
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Barrio Sarriena, s/n, 48940 Leioa, Bizkaia, Spain
| | - Eulogio J Bedmar
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, c/Profesor Albareda, 1, 18008 Granada, Spain
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Nanis I, Hatzikamari M, Katharopoulos E, Boukouvala E, Ekateriniadou L, Litopoulou-Tzanetaki E, Gerasopoulos D. Microbiological and physicochemical changes during fermentation of solid residue of olive mill wastewaters: Exploitation towards the production of an olive paste – type product. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108671] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Combinational system for biodegradation of olive oil mill wastewater phenolics and high yield of bio-hydrogen production. J Biotechnol 2019; 306:47-53. [DOI: 10.1016/j.jbiotec.2019.09.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 09/16/2019] [Indexed: 11/19/2022]
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Pleurotus spp. Cultivation on Different Agri-Food By-Products: Example of Biotechnological Application. SUSTAINABILITY 2019. [DOI: 10.3390/su11185049] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Agri-food industry generally produces huge volumes of wastes all over the world, and their disposal is a threat to the environment and public health. The chemical composition of most of these wastes make them be defined as lignocellulosic materials, so they could be a suitable substrate for solid-state fermentation process operated by mushrooms. White-rot fungi are well known for their degradation ability of lignocellulosic material, and many scientific works reported the use of different substrates for their production. Biotechnological treatments of agri-food wastes by mushrooms could be considered an eco-friendly solution to reuse and valorize them, besides to reduce their environmental impact. In this way, wastes would be transformed into new resources to produce added-value food products, besides representing an economic return for the same industries. The aim of this review is to provide an overview of the recent literature concerning the use of different agri-food residues as growth substrates for Pleurotus spp. cultivation, with attention to their effects on the growth and chemical composition of the cultivated mushrooms.
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Assessment of biotechnological potentials of strains isolated from repasso olive pomace in Tunisia. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01499-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Ali N, Khan S, Yao H, Wang J. Biochars reduced the bioaccessibility and (bio)uptake of organochlorine pesticides and changed the microbial community dynamics in agricultural soils. CHEMOSPHERE 2019; 224:805-815. [PMID: 30851532 DOI: 10.1016/j.chemosphere.2019.02.163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/19/2019] [Accepted: 02/23/2019] [Indexed: 06/09/2023]
Abstract
Biochar is considered as a universal sorbent used for soil amendment but its impacts on organochlorine pesticides (OCPs) and microbial communities associated with soil and vegetables are unclear. The effects of different biochars (derived from sewage sludge biochar (SSBC), soybean straw biochar (SBBC), rice straw biochar (RSBC) and peanut shells biochar (PNBC)), on bioaccessible fractions of OCPs in a contaminated soil and their subsequent bioaccumulation into vegetables (Chinese cabbage and spring onion) were investigated in this research work. The influence of these amendments on vegetable yields and soil microbial community using Illumina next generation sequencing technology was also assessed. The application of selected biochars significantly (p < 0.01) reduced the bioaccessibility of ∑OCPs in contaminated soil: SSBC (52%), PNBC (51%), RSBC (60%), and SBBC (47%), as compared to the control. The results indicated that following biochar additions, the bio-uptake of ∑OCP bio-uptake was considerably (from 86 to 85%) reduced in grown vegetables. Risk assessment showed that biochar amendments markedly (p < 0.01) decreased the hazard quotient (HQ) indices and incremental lifetime cancer risk (ILTR) values for OCPs associated with the consumption of vegetables. In addition, the results of high-throughput sequencing showed significant differences in microbial community structure between the treatments, which was driven by differences in the relative abundances of soil microbes. The relative abundances of Acidobacteria, Chloroflexi, Nitrospirae and Verrucomicrobia decreased following biochar additions. However, biochar amendments increased the relative abundances of Actinobacteria, Proteobacteria, Planctomycetes, Bacteroidetes, Firmicutes, and Gemmatimonadetes, though the increase in relative abundances of these phyla was strongly dependent on the type of biochar used.
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Affiliation(s)
- Neelum Ali
- Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo, 315800, People's Republic of China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China; Department of Environmental Sciences, University of Peshawar, Peshawar 25120, Pakistan
| | - Sardar Khan
- Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo, 315800, People's Republic of China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China; Department of Environmental Sciences, University of Peshawar, Peshawar 25120, Pakistan.
| | - Huaiying Yao
- Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo, 315800, People's Republic of China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China; Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430073, People's Republic of China.
| | - Juan Wang
- Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo, 315800, People's Republic of China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, People's Republic of China
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26
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Dolcet M, Torres M, Canela-Garayoa R. Raw and waste plant materials as sources of fungi with epoxide hydrolase activity. Application to the kinetic resolution of aryl and alkyl glycidyl ethers. BIOCATAL BIOTRANSFOR 2018. [DOI: 10.1080/10242422.2017.1308496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Marta Dolcet
- Department of Food Technology, University of Lleida, Lleida, Spain
| | - Mercè Torres
- Department of Food Technology, University of Lleida, Lleida, Spain
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Zerva A, Zervakis GI, Christakopoulos P, Topakas E. Degradation of olive mill wastewater by the induced extracellular ligninolytic enzymes of two wood-rot fungi. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 203:791-798. [PMID: 26947318 DOI: 10.1016/j.jenvman.2016.02.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 02/17/2016] [Accepted: 02/22/2016] [Indexed: 05/25/2023]
Abstract
Olive mill wastewater (OMWW) is a major problem in olive oil - producing countries, due to its high organic load and concentration in phenols that are toxic for marine life, plants and soil microorganisms. In the present study, two mushroom species were tested in regard to their OMWW's oxidative capacity, Pleurotus citrinopileatus LGAM 28684 and Irpex lacteus LGAM 238. OMWW (25% v/v) degradation was investigated for several culture conditions, namely pH, agitation speed, nitrogen-based supplements and their concentration. The selected values were pH 6, agitation rate 150 rpm, 30 g L-1 corn steep liquor as nitrogen source for P. citrinopileatus and 20 g L-1 diammonium tartrate for I. lacteus. The two strains performed well in cultures supplemented with OMWW, generating very high titers of oxidative enzymes and achieving more than 90% color and phenols reduction within a 24 days cultivation period. In addition, the amount of glucans present in the fungal biomass was assessed. Hence, P. citrinopileatus and I. lacteus appear as potent degraders of OMWW with the ability to use the effluent as a substrate for the production of biotechnologically important enzymes and valuable fungal glucans.
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Affiliation(s)
- Anastasia Zerva
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Paul Christakopoulos
- Biochemical and Chemical Process Engineering, Division of Sustainable Process Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Evangelos Topakas
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece.
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28
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Borroni V, González MT, Carelli AA. Bioproduction of carotenoid compounds using two-phase olive mill waste as the substrate. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.01.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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El-Abbassi A, Saadaoui N, Kiai H, Raiti J, Hafidi A. Potential applications of olive mill wastewater as biopesticide for crops protection. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 576:10-21. [PMID: 27780096 DOI: 10.1016/j.scitotenv.2016.10.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 10/04/2016] [Accepted: 10/04/2016] [Indexed: 05/14/2023]
Affiliation(s)
- Abdelilah El-Abbassi
- Food Sciences Laboratory, Department of Biology, Faculty of Sciences - Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco.
| | - Nabila Saadaoui
- Department of Biology, Faculty of Sciences - Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco
| | - Hajar Kiai
- Food Sciences Laboratory, Department of Biology, Faculty of Sciences - Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco
| | - Jihane Raiti
- Food Sciences Laboratory, Department of Biology, Faculty of Sciences - Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco
| | - Abdellatif Hafidi
- Food Sciences Laboratory, Department of Biology, Faculty of Sciences - Semlalia, Cadi Ayyad University, P.O. Box: 2390, 40001 Marrakech, Morocco
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30
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Tortosa G, Castellano-Hinojosa A, Correa-Galeote D, Bedmar EJ. Evolution of bacterial diversity during two-phase olive mill waste ("alperujo") composting by 16S rRNA gene pyrosequencing. BIORESOURCE TECHNOLOGY 2017; 224:101-111. [PMID: 27931940 DOI: 10.1016/j.biortech.2016.11.098] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 11/22/2016] [Accepted: 11/23/2016] [Indexed: 06/06/2023]
Abstract
Microorganisms are the main contributing factor responsible for organic matter degradation during composting. In this research, the 454-pyrosequencing of the 16S rRNA gene was used to elucidate evolution of bacterial diversity during mesophilic, thermophilic and maturation composting stages of the two-phase olive mill waste ("alperujo"), the main by-product of the Spanish olive oil industry. Two similar piles were performance composting AL with sheep manure as bulking agent. Actinobacteria, Bacteriodetes, Firmicutes and Proteobacteria were the main phyla found in genomic libraries from each composting phase. Shannon and Chao1 biodiversity indices showed a clear difference between the mesophilic/thermophilic and maturation phases, which was mainly due to detection of new genera. PCA analysis of the relative number of sequences confirmed maturation affected bacterial population structure, and Pearson correlation coefficients between physicochemical composting parameters and relative number of genera sequences suggest that Planomicrobium and Ohtaekwangia could be considered as biomarkers for AL composting maturation.
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Affiliation(s)
- Germán Tortosa
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, E-419, 18080-Granada, Spain.
| | - Antonio Castellano-Hinojosa
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, E-419, 18080-Granada, Spain
| | - David Correa-Galeote
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, E-419, 18080-Granada, Spain
| | - Eulogio J Bedmar
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín (EEZ), Agencia Estatal CSIC, E-419, 18080-Granada, Spain
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31
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Jakovljević VD. Metabolic activity of Aspergillus niger and Fusarium lateritium induced by ethoxylated oleyl cetyl alcohol and their bioremediation and biotechnological potential. APPL BIOCHEM MICRO+ 2016. [DOI: 10.1134/s0003683816040074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Navarro RR, Hori T, Inaba T, Matsuo K, Habe H, Ogata A. High-resolution phylogenetic analysis of residual bacterial species of fouled membranes after NaOCl cleaning. WATER RESEARCH 2016; 94:166-175. [PMID: 26945453 DOI: 10.1016/j.watres.2016.02.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 06/05/2023]
Abstract
Biofouling is one of the major problems during wastewater treatment using membrane bioreactors (MBRs). In this regard, sodium hypochlorite (NaOCl) has been widely used to wash fouled membranes for maintenance and recovery purposes. Advanced chemical and biological characterization was conducted in this work to evaluate the performance of aqueous NaOCl solutions during washing of polyacrylonitrile membranes. Fouled membranes from MBR operations supplemented with artificial wastewater were washed with 0.1% and 0.5% aqueous NaOCl solutions for 5, 10 and 30 min. The changes in organics composition on the membrane surface were directly monitored by an attenuated total reflection Fourier transform infrared (ATR-FT-IR) spectrometer. In addition, high-throughput Illumina sequencing of 16S rRNA genes was applied to detect any residual microorganisms. Results from ATR-FT-IR analysis indicated the complete disappearance of functional groups representing different fouling compounds after at least 30 min of treatment with 0.1% NaOCl. However, the biomolecular survey revealed the presence of residual bacteria even after 30 min of treatment with 0.5% NaOCl solution. Evaluation of microbial diversity of treated samples using Chao1, Shannon and Simpson reciprocal indices showed an increase in evenness while no significant decline in richness was observed. These implied that only the population of dominant species was mainly affected. The high-resolution phylogenetic analysis revealed the presence of numerous operational taxonomic units (OTUs) whose close relatives exhibit halotolerance. Some OTUs related to thermophilic and acid-resistant strains were also identified. Finally, the taxonomic analysis of recycled membranes that were previously washed with NaOCl also showed the presence of numerous halotolerant-related OTUs in the early stage of fouling. This further suggested the possible contribution of such chemical tolerance on their survival against NaOCl washing, which in turn affected their re-fouling potential.
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Affiliation(s)
- Ronald R Navarro
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Tomoyuki Hori
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan.
| | - Tomohiro Inaba
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Kazuyuki Matsuo
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
| | - Hiroshi Habe
- Research Institute for Sustainable Chemistry, AIST, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Atsushi Ogata
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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Zhao YH, Chen LY, Tian ZJ, Sun Y, Liu JB, Huang L. Characterization and application of a novel bioemulsifier in crude oil degradation byAcinetobacter beijerinckiiZRS. J Basic Microbiol 2015; 56:184-95. [DOI: 10.1002/jobm.201500487] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/18/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Yi-He Zhao
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
| | - Li-Yuan Chen
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
| | - Zi-Jing Tian
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
| | - Yue Sun
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
| | - Jin-Biao Liu
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
| | - Lei Huang
- College of Chemistry; Chemical Engineering; Tianjin University of Technology; Tianjin China
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34
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Bassani I, Kougias PG, Treu L, Angelidaki I. Biogas Upgrading via Hydrogenotrophic Methanogenesis in Two-Stage Continuous Stirred Tank Reactors at Mesophilic and Thermophilic Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12585-93. [PMID: 26390125 DOI: 10.1021/acs.est.5b03451] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
This study proposes an innovative setup composed by two stage reactors to achieve biogas upgrading coupling the CO2 in the biogas with external H2 and subsequent conversion into CH4 by hydrogenotrophic methanogenesis. In this configuration, the biogas produced in the first reactor was transferred to the second one, where H2 was injected. This configuration was tested at both mesophilic and thermophilic conditions. After H2 addition, the produced biogas was upgraded to average CH4 content of 89% in the mesophilic reactor and 85% in the thermophilic. At thermophilic conditions, a higher efficiency of CH4 production and CO2 conversion was recorded. The consequent increase of pH did not inhibit the process indicating adaptation of microorganisms to higher pH levels. The effects of H2 on the microbial community were studied using high-throughput Illumina random sequences and full-length 16S rRNA genes extracted from the total sequences. The relative abundance of archaeal community markedly increased upon H2 addition with Methanoculleus as dominant genus. The increase of hydrogenotrophic methanogens and syntrophic Desulfovibrio and the decrease of aceticlastic methanogens indicate a H2-mediated shift toward the hydrogenotrophic pathway enhancing biogas upgrading. Moreover, Thermoanaerobacteraceae were likely involved in syntrophic acetate oxidation with hydrogenotrophic methanogens in absence of aceticlastic methanogenesis.
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Affiliation(s)
- Ilaria Bassani
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Laura Treu
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark , Kgs. Lyngby, Denmark
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35
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de Castro A, Asencio E, Ruiz-Méndez MV, Romero C, Brenes M. Production of 4-ethylphenol in alperujo by Lactobacillus pentosus. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2015; 95:2222-2227. [PMID: 25267118 DOI: 10.1002/jsfa.6939] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/01/2014] [Accepted: 09/25/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Alperujo is the paste generated from the two-phase extraction system of olive oil. This wet pomace must be stored for several months and, during this period, the formation of 4-ethyphenol provokes a strong off-odour. The aim of this work was to identify the microorganisms able to produce this volatile phenol. RESULTS Yeast and bacterial strains were isolated from stored alperujo and tested for their ability to metabolize p-coumaric acid and form 4-ethylphenol. Among them, Lactobacillus pentosus was the microorganism that both in synthetic medium and alperujo gave rise to 4-ethylphenol formation. This microorganism did not grow in alperujo acidified to pH 2, thereby confirming that acidification as the best method to control odour emissions during alperujo storage. CONCLUSION Lactic acid bacteria, particularly Lactobacillus pentosus, can be responsible for the formation of the off-odour caused by 4-ethylphenol during the storage of alperujo. This odour can be prevented by acidifying the alperujo.
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Affiliation(s)
| | | | | | | | - Manuel Brenes
- Instituto de la Grasa IG-CSIC, 41012-, Seville, Spain
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36
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Siles JA, Cajthaml T, Hernández P, Pérez-Mendoza D, García-Romera I, Sampedro I. Shifts in soil chemical properties and bacterial communities responding to biotransformed dry olive residue used as organic amendment. MICROBIAL ECOLOGY 2015; 70:231-243. [PMID: 25501891 DOI: 10.1007/s00248-014-0552-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 12/01/2014] [Indexed: 06/04/2023]
Abstract
Dry olive residue (DOR) is a waste product derived from olive oil extraction and has been proposed as an organic amendment. However, it has been demonstrated that a pre-treatment, such as its transformation by saprophytic fungi, is required before DOR soil application. A greenhouse experiment was designed where 0 and 50 g kg(-1) of raw DOR (DOR), Coriolopsis floccosa-transformed DOR (CORDOR) and Fusarium oxysporum-transformed DOR (FUSDOR) were added to soil. Analyses of the soil chemical properties as well as the structure and relative abundance of bacterial and actinobacterial communities were conducted after 0, 30 and 60 days following amendment. The different amendments produced a slight decrease in soil pH and significant increases in carbon fractions, C/N ratios, phenols and K, with these increases being more significant after DOR application. Quantitative PCR assays of the 16S rRNA gene and PLFA analyses showed that all amendments favoured bacterial growth at 30 and 60 days, although actinobacterial proliferation was more evident after CORDOR and FUSDOR application at 60 days. Bacterial and actinobacterial DGGE multivariate analyses showed that the amendments produced structural changes in both communities, especially after 60 days of amendment. PLFA data analysis identified changes in soil microbial communities according to the amendment considered, with FUSDOR and CORDOR being less disruptive than DOR. Finally, integrated analysis of all data monitored in the present study enabled us to conclude that the greatest impact on soil properties was caused by DOR at 30 days and that soil showed some degree of resilience after this time.
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Affiliation(s)
- José A Siles
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), C/ Profesor Albareda, 1, E-18008, Granada, Spain,
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37
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Ntougias S, Baldrian P, Ehaliotis C, Nerud F, Merhautová V, Zervakis GI. Olive mill wastewater biodegradation potential of white-rot fungi--Mode of action of fungal culture extracts and effects of ligninolytic enzymes. BIORESOURCE TECHNOLOGY 2015; 189:121-130. [PMID: 25879179 DOI: 10.1016/j.biortech.2015.03.149] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 06/04/2023]
Abstract
Forty-nine white-rot strains belonging to 38 species of Basidiomycota were evaluated for olive-mill wastewater (OMW) degradation. Almost all fungi caused high total phenolics (>60%) and color (⩽ 70%) reduction, while COD and phytotoxicity decreased to a lesser extent. Culture extracts from selected Agrocybe cylindracea, Inonotus andersonii, Pleurotus ostreatus and Trametes versicolor strains showed non-altered physicochemical and enzymatic activity profiles when applied to raw OMW in the presence or absence of commercial catalase, indicating no interaction of the latter with fungal enzymes and no competition for H2O2. Hydrogen peroxide's addition resulted in drastic OMW's decolorization, with no effect on phenolic content, suggesting that oxidation affects colored components, but not necessarily phenolics. When fungal extracts were heat-treated, no phenolics decrease was observed demonstrating thus their enzymatic rather than physicochemical oxidation. Laccases added to OMW were reversibly inhibited by the effluent's high phenolic load, while peroxidases were stable and active during the entire process.
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Affiliation(s)
- Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Vas. Sofias 12, 67100 Xanthi, Greece
| | - Petr Baldrian
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Constantinos Ehaliotis
- Agricultural University of Athens, Laboratory of Soils and Agricultural Chemistry, Iera Odos 75, 11855 Athens, Greece
| | - Frantisek Nerud
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Věra Merhautová
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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38
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Microbial community structure and disposal issues of table olive wastewaters generated from the fermentation of the olive cultivar ‘Kalamon’. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-013-0791-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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39
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Barnes HE, Liu G, Weston CQ, King P, Pham LK, Waltz S, Helzer KT, Day L, Sphar D, Yamamoto RT, Forsyth RA. Selective microbial genomic DNA isolation using restriction endonucleases. PLoS One 2014; 9:e109061. [PMID: 25279840 PMCID: PMC4184833 DOI: 10.1371/journal.pone.0109061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 08/28/2014] [Indexed: 11/25/2022] Open
Abstract
To improve the metagenomic analysis of complex microbiomes, we have repurposed restriction endonucleases as methyl specific DNA binding proteins. As an example, we use DpnI immobilized on magnetic beads. The ten minute extraction technique allows specific binding of genomes containing the DpnI Gm6ATC motif common in the genomic DNA of many bacteria including γ-proteobacteria. Using synthetic genome mixtures, we demonstrate 80% recovery of Escherichia coli genomic DNA even when only femtogram quantities are spiked into 10 µg of human DNA background. Binding is very specific with less than 0.5% of human DNA bound. Next Generation Sequencing of input and enriched synthetic mixtures results in over 100-fold enrichment of target genomes relative to human and plant DNA. We also show comparable enrichment when sequencing complex microbiomes such as those from creek water and human saliva. The technique can be broadened to other restriction enzymes allowing for the selective enrichment of trace and unculturable organisms from complex microbiomes and the stratification of organisms according to restriction enzyme enrichment.
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Affiliation(s)
- Helen E. Barnes
- FLIR Systems, Inc., La Jolla, California, United States of America
| | - Guohong Liu
- FLIR Systems, Inc., La Jolla, California, United States of America
| | | | - Paula King
- FLIR Systems, Inc., La Jolla, California, United States of America
| | - Long K. Pham
- FLIR Systems, Inc., La Jolla, California, United States of America
| | - Shannon Waltz
- FLIR Systems, Inc., La Jolla, California, United States of America
| | | | - Laura Day
- FLIR Systems, Inc., La Jolla, California, United States of America
| | - Dan Sphar
- FLIR Systems, Inc., La Jolla, California, United States of America
| | | | - R. Allyn Forsyth
- FLIR Systems, Inc., La Jolla, California, United States of America
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40
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Siles JA, Rachid CTCC, Sampedro I, García-Romera I, Tiedje JM. Microbial diversity of a Mediterranean soil and its changes after biotransformed dry olive residue amendment. PLoS One 2014; 9:e103035. [PMID: 25058610 PMCID: PMC4109964 DOI: 10.1371/journal.pone.0103035] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 06/27/2014] [Indexed: 01/18/2023] Open
Abstract
The Mediterranean basin has been identified as a biodiversity hotspot, about whose soil microbial diversity little is known. Intensive land use and aggressive management practices are degrading the soil, with a consequent loss of fertility. The use of organic amendments such as dry olive residue (DOR), a waste produced by a two-phase olive-oil extraction system, has been proposed as an effective way to improve soil properties. However, before its application to soil, DOR needs a pre-treatment, such as by a ligninolytic fungal transformation, e.g. Coriolopsis floccosa. The present study aimed to describe the bacterial and fungal diversity in a Mediterranean soil and to assess the impact of raw DOR (DOR) and C. floccosa-transformed DOR (CORDOR) on function and phylogeny of soil microbial communities after 0, 30 and 60 days. Pyrosequencing of the 16S rRNA gene demonstrated that bacterial diversity was dominated by the phyla Proteobacteria, Acidobacteria, and Actinobacteria, while 28S-rRNA gene data revealed that Ascomycota and Basidiomycota accounted for the majority of phyla in the fungal community. A Biolog EcoPlate experiment showed that DOR and CORDOR amendments decreased functional diversity and altered microbial functional structures. These changes in soil functionality occurred in parallel with those in phylogenetic bacterial and fungal community structures. Some bacterial and fungal groups increased while others decreased depending on the relative abundance of beneficial and toxic substances incorporated with each amendment. In general, DOR was observed to be more disruptive than CORDOR.
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Affiliation(s)
- José A. Siles
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
- * E-mail:
| | - Caio T. C. C. Rachid
- Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Center for Microbial Ecology, Michigan State University, East Lansing, Michigan, United States of America
| | - Inmaculada Sampedro
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Inmaculada García-Romera
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
| | - James M. Tiedje
- Center for Microbial Ecology, Michigan State University, East Lansing, Michigan, United States of America
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Comparative examination of the olive mill wastewater biodegradation process by various wood-rot macrofungi. BIOMED RESEARCH INTERNATIONAL 2014; 2014:482937. [PMID: 24987685 PMCID: PMC4060750 DOI: 10.1155/2014/482937] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/30/2014] [Accepted: 05/01/2014] [Indexed: 11/23/2022]
Abstract
Olive mill wastewater (OMW) constitutes a major cause of environmental pollution in olive-oil producing regions. Sixty wood-rot macrofungi assigned in 43 species were evaluated for their efficacy to colonize solidified OMW media at initially established optimal growth temperatures. Subsequently eight strains of the following species were qualified: Abortiporus biennis, Ganoderma carnosum, Hapalopilus croceus, Hericium erinaceus, Irpex lacteus, Phanerochaete chrysosporium, Pleurotus djamor, and P. pulmonarius. Fungal growth in OMW (25%v/v in water) resulted in marked reduction of total phenolic content, which was significantly correlated with the effluent's decolorization. A. biennis was the best performing strain (it decreased phenolics by 92% and color by 64%) followed by P. djamor and I. lacteus. Increase of plant seeds germination was less pronounced evidencing that phenolics are only partly responsible for OMW's phytotoxicity. Laccase production was highly correlated with all three biodegradation parameters for H. croceus, Ph. chrysosporium, and Pleurotus spp., and so were manganese-independent and manganese dependent peroxidases for A. biennis and I. lacteus. Monitoring of enzymes with respect to biomass production indicated that Pleurotus spp., H. croceus, and Ph. chrysosporium shared common patterns for all three activities. Moreover, generation of enzymes at the early biodegradation stages enhanced the efficiency of OMW treatment.
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