Статті в журналах: "Olives – Recyclage"

1

Mekki, H. "Recyclage des déchets de la trituration des olives dans les briques de construction." Annales de Chimie Science des Matériaux 28, no. 1 (January 2003): 109–27. http://dx.doi.org/10.1016/s0151-9107(03)00010-2.

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2

Bouigua, Hassan, Raifa Bakali, Hassna Jaber, Karima El Kabous, Soumaya Choukri, Mohamed Elyachioui, and Mohammed Ouhssine. "A remarkable step in the aerobic biological treatment of Olive Mill Wastewater (OMW): A combination of selected microbial strains that enhance their decolorization and depollution." E3S Web of Conferences 527 (2024): 02007. http://dx.doi.org/10.1051/e3sconf/202452702007.

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The olive industry extracts oil from olives but also generates solid co-products called pomace and liquid wastes known as Olive Mill Wastewater (OMW). With global annual production exceeding 30 million tons and approximately 685,000 tons in Morocco alone, these wastes pose environmental challenges due to their high acidity, organic load, and phenolic compounds. Our research aims to depollute and recycle OMW using aerobic biological treatment methods. Samples were collected from various ecological sites across four Moroccan regions. We isolated and purified several strains of molds, yeasts, and bacteria capable of decolorizing OMW. Decolorization experiments revealed promising results, with a combination of seven selected molds showing significant reductions in chemical oxygen demand (COD) by 71.44%, biochemical oxygen demand (BOD5) by 69.91%, and polyphenols content by 84.22%. Encouraged by these findings, we propose further treatment using sourdoughs composed of combinations of different pure strains, including yeasts and selected bacteria such as Bacillus subtilis and Pseudomonas aeruginosa. This approach demonstrates a practical and cost-effective method for depolluting and recycling OMW, contributing to environmental protection and human health preservation. By mitigating the risks associated with untreated OMW discharge, this study offers a viable solution to the environmental challenges posed by olive processing industries globally, particularly in regions like Morocco where olive cultivation is significant.

3

Dahim, M. A., M. Abuaddous, H. Al-Mattarneh, A. E. Alluqmani, and R. Ismail. "The use of olive waste for development sustainable rigid pavement concrete material." IOP Conference Series: Materials Science and Engineering 1212, no. 1 (January 1, 2022): 012032. http://dx.doi.org/10.1088/1757-899x/1212/1/012032.

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Abstract Recycle and reuse of agriculture and industrial wastes becomes a big chalenge in different parts of the world. The success in the waste recycle could lead to conserve the environment, reduce the use of cement, and improve health environment. This paper presents the potential use of fly ash from olive oil waste in Jordan to improve concrete material which could be used as a sustainable material for rigid pavement and building construction material. Olive oil ash was collected from olive oil mill and replace cement in producing concrete material. The range of cement replacement was 0% to 12.5% with increment 2.5%. The results indicate that olive oil reduces the workability of concrete material. The reduction of the slump of concrete increases with increasing olive ash content. Strength and durability of concrete improved and increased with increasing olive ash content in concrete up to 7.5 percent then the strength reduced. The results in this study show that the use of 7.5% was the optimum replacement of cement. This percent could produce concrete with higher strength and higher durability in comparison with the control concrete mix. Olive waste ash enhances both strength and durability because it reduces the effective water-cement ratio in concrete mix and filling the pore and void structure in concrete material. The benefits of this study could reduce the cost of concrete and recycle waste material and enhance concrete properties.

4

Abu-Dalo, Muna, Jehad Abdelnabi, and Abeer Al Bawab. "Preparation of Activated Carbon Derived from Jordanian Olive Cake and Functionalized with Cu/Cu2O/CuO for Adsorption of Phenolic Compounds from Olive Mill Wastewater." Materials 14, no. 21 (November 4, 2021): 6636. http://dx.doi.org/10.3390/ma14216636.

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Olive oil production generates solid and liquid wastes that cause various environmental problems due to their high phenols and polyphenols load. Although many treatment methods were investigated to manage these wastes, more research is still needed to identify simple and cost-effective approaches. In this study, activated carbon (AC) was prepared from olive cake waste and functionalized with Cu/Cu2O/CuO for efficient and selective removal of phenolic content from olive mill wastewater (OMW). AC media were characterized by scanning electron/dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectrometry, and Brunauer–Emmett–Teller (BET) surface area analysis. The optimum adsorption parameters were investigated, and the adsorption isotherms, thermodynamics, and kinetics were determined. The adsorption of phenols onto copper oxide AC was best described by the Langmuir adsorption with maximum adsorption capacity of 13.9, 12.7, and 9.9 mg/g at 311, 302, and 293 K, respectively. The adsorption reaction was found to be spontaneous and endothermic where ∆H° and ∆G° were found to be 30.104 kJ/mol and −1.765, −2.839, and −3.723 (kJ/mol) at 311, 302, and 293 K, respectively. In addition, the kinetics data were perfectly fit by the pseudo-second-order model. The activated product derived from recyclable olive cake and enriched with inorganic functionality can offer a cost-effective treatment solution for OMW; thus, reducing both the liquid and solid waste generated from the olive mill industry.

5

Lertcumfu, Narumon, Kannikar Kaewapai, Pharatree Jaita, Tawee Tunkasiri, Somnuk Sirisoonthorn, and Gobwute Rujijanagul. "Effects of olive oil on physical and mechanical properties of ceramic waste-based geopolymer foam." Journal of Reinforced Plastics and Composites 39, no. 3-4 (December 27, 2019): 111–18. http://dx.doi.org/10.1177/0731684419896852.

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The present study concentrated on porous geopolymer composites (between calcined clay and metakaolin) using hydrogen peroxide as a pore generation agent. To reduce as well as recycle the waste from a factory, calcined clay waste was used as starting material. The geopolymer was synthesized via a geopolymerization method by a reaction with an alkaline solution, using the ceramic waste and metakaolin as raw materials. Different amount of olive oil (0–15 wt%) were added to the samples. The olive oil affected the pore formation of the geopolymers. The effects of olive oil, a surfactant, on the properties of the geopolymer composites were investigated. Apparent density and compressive strength of the samples tended to decrease with the additive, while water absorption and total porosity had the opposite effect. However, a variation in the apparent density and water absorption values was observed, due to the formation of closed pores in the samples. The trend of compressive strength value was related with total porosity. A model for pore formation was proposed in this work. The results suggest that this material can be used as a geopolymer foam.

6

Dini, Irene, Giulia Graziani, Francalisa Luisa Fedele, Andrea Sicari, Francesco Vinale, Luigi Castaldo, and Alberto Ritieni. "An Environmentally Friendly Practice Used in Olive Cultivation Capable of Increasing Commercial Interest in Waste Products from Oil Processing." Antioxidants 9, no. 6 (June 1, 2020): 466. http://dx.doi.org/10.3390/antiox9060466.

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In the Rural Development Plan (2014–2020), the European Commission encouraged the conversion and supported the maintenance of organic farming. Organic olive oil (bioEVOO) production involves the use of environmentally sustainable fertilizers and the recycling of olive pomace (Pom) and olive vegetation waters (VW) to reduce the environmental impact of these wastes. An ecofriendly way to recycle olive wastes is to reuse them to extract bioactive compounds. In this study, the total phenolic compounds content, their profile and dosage, the antioxidant action in oil, pomace, and vegetation water was evaluated when the Trichoderma harzianum M10 was used as a biostimulant in agriculture. Two spectrophotometric tests (2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic) acid (ABTS)) evaluated the antioxidant potential of samples, a spectrophotometric method estimated total phenolic content, and an Ultra-High-Performance Liquid Chromatography (UHPLC)–Orbitrap method evaluated the phenolics profile. Our results showed that the biostimulation improved the antioxidant potential and the total concentration of phenolics in the bioEVOO and bio-pomace (bioPom) samples and mainly enhanced, among all classes of phenolic compounds, the production of the flavonoids and the secoiridoids. Moreover, they demonstrated the Trichoderma action in the mevalonate pathway to produce phenols for the first time. The decisive action of the Thricoderma on the production of phenolic compounds increases the economic value of the waste materials as a source of bioactive compounds useful for the pharmaceutical, cosmetic, and food industries.

7

Albiach, Remedios, Pedro Rojo, Sergio Lloret, Vicente Fajardo, Gloria Fayos, and Tatiana Montoya. "Ecotoxicological evaluation and characterization of sewage sludge and agri-food waste composts." Soil and Environment 42, no. 2 (November 30, 2023): 130–39. http://dx.doi.org/10.25252/se/2023/242888.

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The expanding population is leading to a continuous rise in the quantity of generated waste. Due to this, there is a need to recycle the waste generated so that it can be reused. Composting is a highly attractive method to manage and recycle waste generated, both because of the ease of management and for the lower cost compared to other treatments. In this study, eight different combinations of waste with wastewater treatment plant (WWTP) sludge as the principal waste and other plant waste in different proportions (garden waste, grape stalks, forest waste, olive and almond tree pruning cuttings, straw, and sawdust) were prepared. Composting in outdoor piles was carried out for 220 days, with weekly turning and watering as needed. At the end of the process eight composts were obtained with nutrient contents ranging from 2.23-3.24% total nitrogen (TN), 1.04-3.06% P2O5 and 0.37-1.99% K2O, with characteristics suitable for use in agriculture. Phytotoxicological and ecotoxicological evaluations showed that the generated composts had a growth-stimulation effect (germination rate greater than 100%) and very low environmental risk coefficients (risk coefficient less than 1).

8

Costantino, Francesco, Giulio Di Gravio, Genny Sciarra, and Massimo Tronci. "Environmental Chains for Secondary Raw Materials to Reduce Production Wastes through Reuse and Recycle." Applied Mechanics and Materials 295-298 (February 2013): 1714–19. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1714.

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The issue of waste management has been a social and political priority for many years. Different experiences show what benefits can be obtained through interventions that reduce waste or foresee some mechanisms for reusing and recycling. In this context, the paper presents the results of a project financed by the EU LIFE + fund, dedicated to the creation of chains of secondary raw materials. The paper shows the methodology used and the results achieved in the project. In particular the chain for the recovery of olive oil mill wastes is presented. A feasibility study for a recovery facility is performed, confirming the profitability of the proposed technology and the goodness of the design methodology.

9

Sayin, Fatih, Sibel Tunali Akar, Tamer Akar, Sema Celik, and Tevfik Gedikbey. "Chitosan immobilization and Fe3O4 functionalization of olive pomace: An eco–friendly and recyclable Pb2+ biosorbent." Carbohydrate Polymers 269 (October 2021): 118266. http://dx.doi.org/10.1016/j.carbpol.2021.118266.

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10

Dedousi, Anna, Maria-Zoi Kritsa, and Evangelia N. Sossidou. "Thermal Comfort, Growth Performance and Welfare of Olive Pulp Fed Broilers during Hot Season." Sustainability 15, no. 14 (July 12, 2023): 10932. http://dx.doi.org/10.3390/su151410932.

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This study evaluated the nutritional effect of dried olive pulp (OP), on broilers’ thermal comfort, growth parameters and welfare in a commercial poultry farm during the hot season. A number of 108 Cobb male broilers, 19 d olds were allocated into three dietary groups: controls (CON), OP3 and OP6, based on the level of OP added to their diet (0%, 3% and 6%). The thermal comfort of broilers was assessed using the temperature–humidity index (THI). Broilers’ body temperature (BT) was determined weekly. OP beneficially affected the growth performance of broilers undergoing very severe heat stress, as indicated by the increased body weight gain (BWG) recorded in OP groups compared to CON during the first week of the experiment and the higher body weight (BW) of OP fed chickens at 26 d of age (p < 0.05). At 26 d of age, OP6 broilers had lower BT (40.55 ± 0.06 °C) than CON (40.78 ± 0.09 °C) (p < 0.05). A positive dietary effect of OP in welfare parameters like feather cleanliness and panting behaviour of chickens fed 6% OP was also recorded. Using OP as feedstuff is a promising feeding strategy for alleviating the adverse effects of heat stress; it also offers the potential to recycle olive by-products, leading to an efficient waste-based circular economy.

11

Petruccioli, M., M. Servili, G. F. Montedoro, and F. Federici. "Development of a recycle procedure for the utilization of vegetation waters in the olive-oil extraction process." Biotechnology Letters 10, no. 1 (January 1988): 55–60. http://dx.doi.org/10.1007/bf01030024.

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12

Prifti, Holta, and Tania Floqi. "Biogas Production in Laboratory Scale from Different Organic Wastes Using Primary Sludge as Co-substrate." European Journal of Engineering and Technology Research 6, no. 3 (April 21, 2021): 44–46. http://dx.doi.org/10.24018/ejers.2021.6.3.2412.

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Biogas production technology not only constitutes a biofuel source, but also can be a mitigation measure for the various environmental pollutants. This technology, i.e., anaerobic digestion is a biological process that takes place naturally when microorganisms break down organic matter in the absence of oxygen. In an enclosed chamber, controlled anaerobic digestion of organic matter produces biogas which is predominantly methane. The produced methane then can be directly used; or after certain conditioning, can be used in onsite power generation, heating homes or as vehicular fuel. Besides, organic waste is increasingly becoming a major problem in every society imposing serious economic and environmental concerns. For this reason, many contemporary researches are emphasizing in finding sustainable solutions to recycle and produce energy from such waste. In this context, this paper aims to investigate the potential of cow and chicken manure, and olive waste for biogas production obtained through the anaerobic digestion process. The substrates were placed in laboratory scale digesters without pretreatment. The retention time in the digesters was 30 days. The samples of the tested substrates were collected and analyzed for pH, total solids, ash, and the content of volatile solids (VS). Under mesophilic conditions, all combinations of cow and chicken manure, and olive waste with sludge by an anaerobic pond of a trickling filter treatment plant, as co-substrate, significantly improved biogas, and methane yields. The experimental results showed that chicken manure (CM) is the most suitable for anaerobic digestion (AD). The next step of the study will consist in implementing a large scale of biogas production plants and we will estimate the national potential of green energy produced by this technology and map the areas that need digesters.

13

Prifti, Holta, and Tania Floqi. "Biogas Production in Laboratory Scale from Different Organic Wastes Using Primary Sludge as Co-substrate." European Journal of Engineering and Technology Research 6, no. 3 (April 21, 2021): 109–11. http://dx.doi.org/10.24018/ejeng.2021.6.3.2412.

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Biogas production technology not only constitutes a biofuel source, but also can be a mitigation measure for the various environmental pollutants. This technology, i.e., anaerobic digestion is a biological process that takes place naturally when microorganisms break down organic matter in the absence of oxygen. In an enclosed chamber, controlled anaerobic digestion of organic matter produces biogas which is predominantly methane. The produced methane then can be directly used; or after certain conditioning, can be used in onsite power generation, heating homes or as vehicular fuel. Besides, organic waste is increasingly becoming a major problem in every society imposing serious economic and environmental concerns. For this reason, many contemporary researches are emphasizing in finding sustainable solutions to recycle and produce energy from such waste. In this context, this paper aims to investigate the potential of cow and chicken manure, and olive waste for biogas production obtained through the anaerobic digestion process. The substrates were placed in laboratory scale digesters without pretreatment. The retention time in the digesters was 30 days. The samples of the tested substrates were collected and analyzed for pH, total solids, ash, and the content of volatile solids (VS). Under mesophilic conditions, all combinations of cow and chicken manure, and olive waste with sludge by an anaerobic pond of a trickling filter treatment plant, as co-substrate, significantly improved biogas, and methane yields. The experimental results showed that chicken manure (CM) is the most suitable for anaerobic digestion (AD). The next step of the study will consist in implementing a large scale of biogas production plants and we will estimate the national potential of green energy produced by this technology and map the areas that need digesters.

14

Diacono, Mariangela, Alessandro Persiani, Elena Testani, Francesco Montemurro, and Corrado Ciaccia. "Recycling Agricultural Wastes and By-products in Organic Farming: Biofertilizer Production, Yield Performance and Carbon Footprint Analysis." Sustainability 11, no. 14 (July 12, 2019): 3824. http://dx.doi.org/10.3390/su11143824.

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The Circular Economy concept implies the re-design of existing production systems in agriculture, by promoting agricultural waste recycling. In an organic zucchini—lettuce rotation, two different agroecological tools were considered: biofertilizer and presence or absence of green manure (GM+ and GM−). In particular, we compared: (i) anaerobic digestate from cattle manure, co-composted with vegetable wastes, with the presence of GM (AD GM+); (ii) olive pomace compost, re-composted, with the presence of GM (OWC GM+); (iii) municipal waste compost with GM (MWC GM+); (iv) municipal waste compost without GM (MWC GM−). These materials were tested with a commercial organic fertilizer without GM (COF GM−) as a positive control. The objectives were: (i) assessing the environmental sustainability of biofertilizers through carbon footprint analysis by greenhouse gas—GHG—emissions; (ii) evaluating the agronomic performance on the vegetable rotation, by energy output assessment. The total carbon emissions of biofertilizers production was 63.9 and 67.0 kg of CO2 eq Mg−1 for AD and OWC, respectively. The co-composting and re-composting processes emitted 31.4 and 8.4 kg CO2 per Mg of compost, respectively. In AD the ventilation phase of composting accounted for 37.2% of total emissions. The total CO2 emission values for the two-crop cycles were the highest in COF GM− and the lowest in OWC GM+, due to different fertilizer sources. On the average of the treatments, the input that induced the highest CO2 emission was irrigation (37.9%). The energy output assessment for zucchini and lettuce highlighted similar performance for all the treatments. Our findings demonstrated the validity of the tested processes to recycle agro-industrial wastes, and the potential of agroecological practices (GM) to mitigate GHG emissions.

15

Pandey, Manisha, Neeraj Kumar, Nitesh Prasad, Ravi Kumar Asthana, and Kalluri V. S. Ranganath. "Surface‐modified NiFe₂O₄ nanoparticles for the production of biodiesel from fatty acids and microalgae lipids Dunaliella salina." Applied Organometallic Chemistry, January 24, 2024. http://dx.doi.org/10.1002/aoc.7370.

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Development of a new and sustainable catalyst is necessary to the society for providing economical technology. Surface modification of nanometal oxides is one of the rapidly growing methods for developing a sustainable catalyst with attractive properties than their parent oxide. In this work, surface‐modified nickel ferrites have been carried out using 4,4′‐biphenyldisulfonic acid (BPDSA) as the linker. Thus, obtained modified material has been characterized using different techniques such as DLS, FT‐IR, TGA, XRD, VSM, and XPS. This well‐characterized, stable, robust, recyclable material offers a good conversion in the fatty acid, that is, oleic acid esterification in the presence of methanol in a short period of time (3.0 h). Based on the kinetic study in the oleic acid esterification, it fits in the pseudo first‐order kinetics, and activation energy was found to be 60.0 kJ/mol. Further, the potentiality of our catalyst was also tested in the transesterification of various raw materials like mustard oil, olive oil, almond oil, and neem oil. In addition, it provides an excellent conversion with microalgae lipid extraction for the production of biodiesel. The kinematic viscosity of the methyl oleate (biodiesel) has been found to be 5.0426 mm2/s at 25°C whereas the dynamic viscosity is 6.0511 mPa, which is nearly the same as biodiesel obtained from Dunaliella salina, microalgae lipid.

16

Brill, Sina E., Ayse Maraslioglu, Catharina Kurz, Florian Kramer, Martin F. Fuhr, Abhyudai Singh, and Eckhard Friauf. "Glycinergic Transmission in the Presence and Absence of Functional GlyT2: Lessons From the Auditory Brainstem." Frontiers in Synaptic Neuroscience 12 (February 9, 2021). http://dx.doi.org/10.3389/fnsyn.2020.560008.

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Synaptic transmission is controlled by re-uptake systems that reduce transmitter concentrations in the synaptic cleft and recycle the transmitter into presynaptic terminals. The re-uptake systems are thought to ensure cytosolic concentrations in the terminals that are sufficient for reloading empty synaptic vesicles (SVs). Genetic deletion of glycine transporter 2 (GlyT2) results in severely disrupted inhibitory neurotransmission and ultimately to death. Here we investigated the role of GlyT2 at inhibitory glycinergic synapses in the mammalian auditory brainstem. These synapses are tuned for resilience, reliability, and precision, even during sustained high-frequency stimulation when endocytosis and refilling of SVs probably contribute substantially to efficient replenishment of the readily releasable pool (RRP). Such robust synapses are formed between MNTB and LSO neurons (medial nucleus of the trapezoid body, lateral superior olive). By means of patch-clamp recordings, we assessed the synaptic performance in controls, in GlyT2 knockout mice (KOs), and upon acute pharmacological GlyT2 blockade. Via computational modeling, we calculated the reoccupation rate of empty release sites and RRP replenishment kinetics during 60-s challenge and 60-s recovery periods. Control MNTB-LSO inputs maintained high fidelity neurotransmission at 50 Hz for 60 s and recovered very efficiently from synaptic depression. During 'marathon-experiments' (30,600 stimuli in 20 min), RRP replenishment accumulated to 1,260-fold. In contrast, KO inputs featured severe impairments. For example, the input number was reduced to ~1 (vs. ~4 in controls), implying massive functional degeneration of the MNTB-LSO microcircuit and a role of GlyT2 during synapse maturation. Surprisingly, neurotransmission did not collapse completely in KOs as inputs still replenished their small RRP 80-fold upon 50 Hz | 60 s challenge. However, they totally failed to do so for extended periods. Upon acute pharmacological GlyT2 inactivation, synaptic performance remained robust, in stark contrast to KOs. RRP replenishment was 865-fold in marathon-experiments, only ~1/3 lower than in controls. Collectively, our empirical and modeling results demonstrate that GlyT2 re-uptake activity is not the dominant factor in the SV recycling pathway that imparts indefatigability to MNTB-LSO synapses. We postulate that additional glycine sources, possibly the antiporter Asc-1, contribute to RRP replenishment at these high-fidelity brainstem synapses.

Статті в журналах з теми "Olives – Recyclage"

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