Olive mill wastes: from wastes to resources

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(14), P. 20853 - 20880

Published: Feb. 26, 2024

Abstract Olive oil extraction has recently experienced a continuous increase due to its related beneficial properties. Consequently, large amounts of olive mill wastes (OMWs) derived from the trituration process are annually produced, causing serious environmental problems. The limited financial capabilities mills make them usually unable bear high costs required for disposal their wastes. Alternatively, valorization OMWs within framework so-called waste-to-resource concept and recycling can represent successful strategy implementation circular economy model in industry, which could have significant socioeconomic impacts on low-income Mediterranean countries. There is, however, no unique solution valorization, wide variety wastes’ composition seasonal production. In this review, potential being reused recent technological advances field assessed. Special focus is given analysis advantages limitations each technology reporting most issues that still limiting industrial scale-up. information collected review shows OMW be effectively exploited several sectors, including energy production agriculture. seems, undervalued, sustainable strategies large-scale remains challenging. More efforts policy actions, through collective encouraging subsidies, establishing public–private collaborations, needed reconcile research progress with practices encourage sector.

Language: Английский

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Effect of olive waste ash on the properties of high‐strength geopolymer concrete

Structural Concrete, Journal Year: 2024, Volume and Issue: unknown

Published: April 2, 2024

Abstract This study examines the effect of incorporating olive waste ash (OWA) into high‐strength geopolymer concrete (HSGC) by partially replacing fly (FA) and/or granulated blast furnace slag (GBFS) in presence rice husk (RHA). A total 18 different mixtures were prepared and divided three groups: (1) Utilizing OWA as a partial replacement for FA at weight ratio 10%–50%. (2) Incorporating substitute GBFS, with (3) Incorporate recommended The slump flow test was used to analyze fresh properties HSGC. hardening examined measuring compressive strength, tensile flexural modulus elasticity. Furthermore, an analysis conducted on water absorbency, sulfate attack, chloride penetration depth. scanning electron microscope microstructural analysis. inclusion HSGC resulted significant enhancement strength. Specifically, adding 20% increased strength 8.9% 28 days. Similarly, 30% GGBS + led improvements 17.8%, respectively. application enhanced microstructure density samples. ideal substitution varied between based weight.

Language: Английский

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Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification

Energies, Journal Year: 2022, Volume and Issue: 15(15), P. 5633 - 5633

Published: Aug. 3, 2022

Municipal sewage sludge is the residual material produced as a waste of municipal wastewater purification. It sophisticated multi-component material, hard to handle. For many years, it has been landfilled, incinerated, and widely used in agriculture practice. When unproperly discharged, very polluting unhealthy. The rapidly increasing global amount annually depends on urbanization, degree development, lifestyle. Some diffused traditional practices were banned or became economically unfeasible unacceptable by communities. In contrast, established that MSS contains valuable resources, which can be utilized energy fertilizer. objective review was prove resource recovery beneficially affordable using modern approaches proper technologies estimate required resources time. open sources information deeply mined, critically examined, selected derive necessary regarding each network segment, from source final point, where disposed of. We found developed some developing countries are involved with ambitious costly plans for remediation, modernization regulations, collecting purification systems, beneficial management approach. also activated process leading technology purification, anaerobic digestion downstream waste. However, biological appear inadequate hydrothermal carbonization, already applicable at full scale, best candidate playing significant role managing big towns small villages.

Language: Английский

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Agro-industrial-based wastes as supplementary cementitious or alkali-activated binder material: a comprehensive review

Innovative Infrastructure Solutions, Journal Year: 2023, Volume and Issue: 8(4)

Published: March 21, 2023

Abstract An attempt to shed light on the use of agro-industrial-based wastes as supplementary cementitious material (SCM) or alkali-activated binder (AAB) is mainly focused in this review paper. The SCM AAB acts a suitable replacement for cement, cement manufacturing tends contribute 8–10% global CO 2 emissions. To gain acceptability construction industry, diverse must demonstrate their potential precursors SCM. materials discussed among agricultural are rice husk ash, olive waste and coconut-based industrial ground granulated blast furnace slag, fly ultra-fine steel slag. paper also analyses effects calcined uncalcined pozzolanic properties system. It clear from studies that tend provide greater reactivity compared wastes, helps early strength development findings indicate hydraulic properties, thereby making them an

Language: Английский

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Evolution and Prospects of Hydrothermal Carbonization

Energies, Journal Year: 2023, Volume and Issue: 16(7), P. 3125 - 3125

Published: March 29, 2023

Hydrothermal carbonization enables the valorization of biomass via thermochemical conversion into various products. Today, this technology is experiencing a situation similar to that experienced in past by other process technologies. Of these technologies, some have become important industrial realities, such as reverse osmosis, while others never been able establish themselves fully. This paper presents brief overview technology’s current status, highlighting its strengths and drawbacks. The primary purpose research activity identify possible future scenario toward which heading. has already established on laboratory scale for time, now it transitional phase between pilot-scale industrial-scale applications. interest HTC aroused continues arouse evidenced growing number publications patents published. In particular, uniform percentage filed countries testifies worldwide interest. advantages but also bottlenecks yet be overcome. Process integration, higher-capacity plants, use Industry 4.0 technologies seem most interesting options overcome last limiting factors make hydrothermal an reality.

Language: Английский

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Immunomodulatory Effects of Natural Feed Additives for Meat Chickens

Life, Journal Year: 2023, Volume and Issue: 13(6), P. 1287 - 1287

Published: May 30, 2023

Broiler chickens are increasingly kept in large numbers intensive housing conditions that stressful, potentially depleting the immune system. With prohibition of use antibiotics poultry feed spreading worldwide, it is necessary to consider role natural additives and antibiotic alternatives stimulate chickens' systems. We review literature describe phytogenic have immunomodulatory benefits broilers. initially major active ingredients from plants, particularly flavonoids, resveratrol humic acid, then herbs, spices, other plants their byproducts effects. The research reviewed demonstrates effectiveness many improving avian system therefore broiler health. However, some, perhaps all, potential reduce immunocompetence if given excessive amounts. Sometimes more effective when combination. There an urgent need determine tolerance levels optimum doses for deemed most suitable replace diet chickens. Effective replacement likely with readily available additives, such as olive oil byproducts, leaves alfalfa. It concluded function plant-derived will be possible, but further doses.

Language: Английский

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A Review of Recent Progresses on Olive Oil Chemical Profiling, Extraction Technology, Shelf‐life, and Quality Control

Chemistry & Biodiversity, Journal Year: 2024, Volume and Issue: 21(4)

Published: Feb. 12, 2024

Abstract Olive oil (OO) is widely recognized as a main component in the Mediterranean diet owing to its unique chemical composition and associated health‐promoting properties. This review aimed at providing readers with recent results on OO physicochemical profiling, extraction technology, quality parameters specified by regulations ensure authentic products for consumers. Recent research progress adulteration were outlined through bibliometric analysis mapping using Vosviewer software. As revealed analysis, richness terms of fatty acids, pigments, polar phenolic compounds, tocopherols, squalene, sterols, triterpenic compounds justify properties increasing demand global consumption. storage critical post‐processing operation that must be optimized avoid oxidation. Owing great commercial value markets, target other vegetable oils. In this context, different chemometric tools developed deal problem. To conclude, consumption market justified composition. Challenges such oxidation stand out issues affecting market.

Language: Английский

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From laboratory- to industrial-scale plants: Future of anaerobic digestion of olive mill solid wastes

Bioresource Technology, Journal Year: 2024, Volume and Issue: 394, P. 130317 - 130317

Published: Jan. 11, 2024

In this review, the main properties of olive mill solid waste, primary by-product oil production, and its feasibility as a feedstock for anaerobic digesters operating at laboratory-, pilot- industrial-scales are discussed in detail. Nutrient addition thermal pretreatments were found to have potential address challenges arising from high carbon-to-nitrogen ratio, low pH, concentration phenolic compounds. Furthermore, co-digestion with different organic feedstocks has been identified one most promising options solve aforementioned problems seasonality nature while improving efficiency treatment plants that operate throughout whole year. The insights generated study show wastes animal farming be environmentally economically sustainable method digestion processes waste.

Language: Английский

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Improving the Rheological Properties of Dough Obtained by Partial Substitution of Wheat Flour with Freeze-Dried Olive Pomace

Foods, Journal Year: 2024, Volume and Issue: 13(3), P. 478 - 478

Published: Feb. 2, 2024

Mediterranean countries are known for their high-quality olives and the production consumption of olive oil. Olive pomace (OP), major by-product oil extraction, is receiving attention its potential as a functional compound in food products, reflecting physiology- health-promoting attributes. This study assessed physico-chemical characteristics OP obtained from two Sardinian cultivars, Bosana Semidana, effect incorporation on baking performance wheat dough. We rheological parameters, pasting profile, fermentation doughs through partial substitution flour with at 0 (control), 1, 2, 3, 5%. inclusion resulted significant differences studied parameters compared control samples. Positive effects included decrease development time, improved dough stability storage, superior loss modulus gas retention capacity. Negative comprised an increase resistance height, production, retention, stickiness, elasticity. These were due to interactions between polyphenols fibre water starch–gluten matrix. found improvements following low percentages OP, especially Semidana 1%. Although higher would be associated greater nutritional health benefits, they degradation dough’s attributes, producing gluten-free-like matrix final product.

Language: Английский

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Towards the Integral Valorization of Olive Pomace‐Derived Biomasses through Biorefinery Strategies

ChemBioEng Reviews, Journal Year: 2024, Volume and Issue: 11(2), P. 253 - 277

Published: Jan. 24, 2024

Abstract The olive oil sector generates a high quantity of biomasses every year, especially in the Mediterranean region. Olive pomace is main one, but depending on extraction and subsequent processing, other derived biomass by‐products are generated like pâté, exhausted pomace, stone, residual pulp. Their sustainable valorization crucial. Therefore, this review first conceptualizes current situation describes these from qualitative quantitative point view. Second, information bioactive compounds they present, technologies used for their extraction, examples applications extracts provided. Third, since will generate new biomasses, takes step forward by integrating biorefinery cascading schemes. It also analyzes benefits integration, contribution to circular (bio)economy, achievement development goals.

Language: Английский

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