Research Topic: waste valorization

Valorization of agro-forest wastes (oak acorns, vineyard pruning, and olive pruning) through the cultivation of shiitake (Lentinula edodes) mushrooms

Researchers tested growing shiitake mushrooms on locally available waste materials like oak acorns, olive pruning, and grape vine pruning instead of the traditionally used oak sawdust. The study found that mushrooms grown on oak acorns or combinations with grape pruning produced similar quantities while having better nutritional content and faster harvest times. This approach helps reduce environmental impact by using agricultural waste and offers sustainable alternatives for mushroom farmers.

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Immobilization of Lead and Zinc in Tailings Sand Using a Stabilizer Synthesized from Granite Sawdust for Mine Remediation

This research addresses the environmental problem of granite sawdust waste from stone processing and mining tailings containing lead and zinc. Scientists developed a new material called GFAS by transforming granite sawdust into a zeolite-based stabilizer that effectively traps and immobilizes heavy metals in mining waste. This sustainable approach, called waste-treats-waste, reduces the mobility of dangerous metals, protecting soil and water from contamination.

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Gigaspora roseae and Coriolopsis rigida Fungi Improve Performance of Quillaja saponaria Plants Grown in Sandy Substrate with Added Sewage Sludge

Researchers studied how two types of beneficial fungi (mycorrhizal and saprophytic) can help a Chilean tree called Quillaja saponaria grow better in sandy soil mixed with treated sewage sludge. When plants were inoculated with these fungi and given moderate amounts of sludge, they showed significantly improved growth. The saprophytic fungus alone produced the best results, increasing plant height by over 300%. This approach could help recycle sewage waste while growing useful plants that produce saponins used in medicine and industry.

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Valorization of Quercus suber L. Bark as a Source of Phytochemicals with Antimicrobial Activity against Apple Tree Diseases

This research shows that waste cork from bottle stopper production contains natural compounds with strong antimicrobial properties. When combined with chitosan oligomers, these cork extracts effectively inhibit fungal and bacterial pathogens that damage apple trees. The natural antimicrobial activity was even more potent than some commercial synthetic fungicides, suggesting cork waste could provide an environmentally sustainable alternative for protecting fruit crops.

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Proteolytic and non-proteolytic mechanisms of keratin degradation in Onygena corvina revealed by a proteogenomic approach

Feathers and wool from the poultry and textile industries create massive waste problems because they are very difficult to break down. Researchers discovered that a fungus called Onygena corvina can break down these tough materials using a sophisticated combination of over 70 different proteins. The fungus doesn’t just use cutting enzymes (proteases) but also uses helper proteins that weaken the structure first by removing chemical modifications and breaking certain chemical bonds. Interestingly, the fungus is even more effective when given both feather and wool together, suggesting these waste streams could be processed simultaneously.

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Applications of Natural Polymers in the Grapevine Industry: Plant Protection and Value-Added Utilization of Waste

Grapevines face significant challenges from drought, extreme temperatures, and fungal diseases. Natural polymers like chitosan, alginate, and cellulose can create protective coatings on grapes that help them retain water, resist pests, and stay healthy. Additionally, waste from grape processing can be recycled into valuable compounds and encapsulated in these polymers for use as plant strengtheners or in food and pharmaceuticals, creating a more sustainable wine industry.

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Fungal Biorefinery: Mushrooming Opportunities

Scientists are discovering how fungi can be grown to create useful materials as alternatives to plastics and other petroleum-based products. By cultivating fungal filaments on agricultural waste, researchers can produce foam-like materials for packaging, strong fibers for textiles, and special carbon materials for energy storage. These fungi-based materials are biodegradable, help recycle waste, and require less energy to produce than traditional synthetic materials.

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Microbes’ role in environmental pollution and remediation: a bioeconomy focus approach

Microbes like bacteria and fungi can break down pollutants and transform harmful waste into useful products through biological processes called bioremediation. By employing these naturally occurring or genetically modified microorganisms, we can clean up contaminated soil and water while producing valuable products like proteins and biofuels. This approach offers an environmentally friendly and economically sustainable solution to waste management that reduces pollution while creating a circular bioeconomy.

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Grape Pomace: A Review of Its Bioactive Phenolic Compounds, Health Benefits, and Applications

Grape pomace is the leftover material from making wine, typically discarded as waste. This review shows that grape pomace is actually packed with beneficial plant compounds called phenolics that have powerful health effects. These compounds can fight bacteria, reduce inflammation, help control blood sugar, and protect heart health, making grape pomace waste valuable for creating new health products in food, cosmetics, and medicine.

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Nutrients and Nutraceuticals from Vitis vinifera L. Pomace: Biological Activities, Valorization, and Potential Applications

Wine production generates millions of tons of grape pomace (the leftover skins, seeds, and stems) annually, which has traditionally been discarded as waste. This review shows that grape pomace is actually rich in valuable nutrients and compounds like polyphenols and fiber that provide significant health benefits including antioxidant, anti-inflammatory, and disease-fighting properties. By using grape pomace in functional foods, supplements, and cosmetics, the wine industry can reduce waste while creating sustainable products that promote human health.

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