Search results for " waste recovery"

showing 5 items of 5 documents

Diffusion dialysis for HCl and heavy metals separation from highly concentrated pickling solutions

2019

Disposal of pickling waste solutions strongly affects hot-dip galvanizing industries’ economics and environmental footprint. Thus, the recovery of acid is an important step to enhance the process sustainability. Diffusion dialysis (DD) can be used to separate acids and heavy metals (e.g. iron and zinc) from pickling waters, promoting the circular use of such raw materials. In the present work, two DD modules, a laboratory scale unit operating in batch and a continuous operated large unit, equipped with Fumasep anionic exchange membranes were tested. Results obtained show that zinc and iron affect HCl recovery in opposite way, however reaching high recovery values. In particular, zinc consid…

Industrial waste recoveryHeavy metalAEMIronModelingPickling proceHClDiffusion dialysi
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Spray-dried ‘green’ polyphenols-enriched extracts from waste bentonite to produce nutraceuticals for oral care

2023

Spray drying green extraction waste recovery bentonite polyphenols oral care
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Recovery from Food Waste-Biscuit Doughs Enriched with Pomegranate Peel Powder as a Model of Fortified Aliment

2022

This research was funded by the "IEV Programme de Cooperation Italie-Tunisie 2014-2020, Re-lancer une nouvelle economie (Re-Ne)". EU project code C-5-3.1-39.

food waste recoveryGeneral Immunology and MicrobiologyPomegranate peelpomegranate peel; fortified food; food waste recoveryfood and beveragesFortified foodSettore CHIM/07 - Fondamenti Chimici Delle TecnologieGeneral Agricultural and Biological SciencesFood waste recoveryGeneral Biochemistry Genetics and Molecular Biologypomegranate peelfortified food
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Development of novel secondary raw materials from grape juice fining waste as enriched excipients for oral care products and pharmaceuticals

2023

Settore CHIM/09 - Farmaceutico Tecnologico Applicativobentonite waste recovery cosmetics pharmaceuticals green extraction oral care spray drying
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Experimental investigation and modeling of diffusion dialysis for HCl recovery from waste pickling solution

2019

Abstract Hydrochloric acid recovery from pickling solutions was studied by employing a batch diffusion dialysis (DD) laboratory test-rig equipped with Fumasep membranes. The effect of main operating parameters such as HCl concentration (0.1–3 M) and the presence of Fe2+ (up to 150 g/l) was investigated to simulate the system operation with real industrial streams. The variation of HCl, Fe2+ and water flux was identified. When only HCl is present, a recovery efficiency of 100% was reached. In the presence of FeCl2, higher acid recovery efficiencies, up to 150%, were observed due to the so-called “salt effect”, which promotes the passage of acid even against its concentration gradient. A 7% l…

OsmosisIndustrial waste recoverySettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciEnvironmental EngineeringMaterials science0208 environmental biotechnologyAnalytical chemistryHydrochloric acid02 engineering and technology010501 environmental sciencesManagement Monitoring Policy and Law01 natural sciencesDiffusion dialysiDiffusionchemistry.chemical_compoundRenal DialysisPicklingWaste Management and Disposal0105 earth and related environmental sciencesLeakage (electronics)AEMSalt effectModelingGeneral Medicine6. Clean water020801 environmental engineeringMembranechemistryHydrochloric AcidConcentration gradientPickling proceAcidsJournal of Environmental Management
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