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Prato allo Stelvio - Prad am Stilfser Joch, Italy

Fatarella E.,Next Technology Tecnotessile
Chemical Fibers International | Year: 2014

The project Supertex (ECO/10/277225), Sustainable Flame Retardant Technical Textile from Recycled Polyester, is aiming to demonstrate that post-industrial and post-consumer polyester waste can be exploited in the textile industry for the production of high added value multifilament yarns to be applied in the production of technical textiles. Within the Supertex project 3 recycled PET (rPET) sources were selected and compared with the virgin PET. Starting from 5% LOPE, the achievable draw ratio was lower. In addition, the temperature of the stretch rolls and duo's needed to be decreased because the yarns stuck to the rolls. The presence of PE limits the processability of PET. The PE concentration should be below 5% in order to allow for a good extrusion process. The recycled PET-PE pellets on the other hand contain approximately 7.5% PE. Multifilament extrusion trials demonstrated that L-PET and 50% L-PET/50 % PET-PE could be spun under the same conditions as the reference PET. Source

Fatarella E.,Next Technology Tecnotessile | Spinelli D.,University of Siena | Ruzzante M.,Next Technology Tecnotessile | Pogni R.,University of Siena
Journal of Molecular Catalysis B: Enzymatic | Year: 2014

Enzyme immobilization has attracted continuous attention in the field of fine chemistry, biomedicine and biosensor. Polyamides are promising materials to promote immobilization: thus, nylon 6 film and nanofiber carriers (prepared by electrospinning method) have been investigated. The enzyme (i.e. laccase from Trametes versicolor) was covalently immobilized onto spacer-arm attached carriers after acidic hydrolysis. The amount of immobilized enzyme on the nylon film and nanofibers was 59.4% and 71.0% respectively. The maximum activity (Vmax) and Michaelis-Menten constant (Km) of laccase immobilized on functionalized carriers were determined. The operational and thermal stabilities of the immobilized laccase were improved compared to free counterpart. The use of nylon carriers for enzyme immobilization has shown interesting properties to be used as biocatalytic material in industrial applications. Furthermore, nylon carriers are cheap and could be produced at large scale. © 2014 Elsevier B.V. Source

Alba J.,Polytechnic University of Valencia | Fatarella E.,Instituto Tecnologico Textil | Blanes M.,Next Technology Tecnotessile | Del Rey R.,Polytechnic University of Valencia | And 2 more authors.
42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life | Year: 2013

The reduction of noise pollution in urban or industrial areas close to urban ones can be achieved using textile materials as elements of installations (walls, floors, ceilings or acoustic barriers). Within the project LIFE - NOISEFREETEX was realized a composite nanostructure by the deposition of electrospun nanofibers PET recycling directly on a non-woven. In this way, we have got a solution to noise pollution using recycled textile materials as coating. In order to characterize these solutions, several sound absorption tests were carried out. The standardized sound absorption tests (ISO 354:2003) require a sample size between 10m2 and 12m2. At the present time, the LIFE - NOISEFREETEX project is going on a validation step of different kinds of nano-recoatings. At this step, the sound absorption of different small size samples is being tested in order to validate or dismiss the coatings which are put on each of them. So, using small samples, we are improving in efficiency and economic budget. In this work, acoustic barriers reduced in size were tested in a reverberant chamber built to scale. They are made from recycled PET covering with nanofibers. Final results show that these nano-eco-barriers could be used as solutions to noise pollution. Copyright© (2013) by Austrian Noise Abatement Association (OAL). Source

Caretti C.,University of Florence | Coppini E.,GIDA S.p.A | Fatarella E.,Next Technology Tecnotessile | Lubello C.,University of Florence
Water Science and Technology | Year: 2011

This paper presents an experimental study aimed at estimating the efficiency of the innovative process of ultrafiltration (UF) combined with sonication (Son.) for the refinement of treated effluent to be reused in wet textile processes. Such a novel approach, which has not yet been employed on a full industrial scale, has been experienced at pilot scale on the secondary effluent of the Baciacavallo wastewater treatment plant (WWTP), which treats part of the effluent from one of the largest textile industry districts in Italy. The combined treatment efficiency was assessed both on ozonated and non-ozonated Baciacavallo secondary effluent. The membrane filtration process was optimized in terms of running time, backwash, chemical addition and cleaning procedures. The sonication treatment was optimized on laboratory-scale with synthetic solutions (demineralized water added with dyestuffs) in terms of hydroxyl radicals formation rate, frequency, acoustic power, hydrogen peroxide addition, contact time and pH. The optimal conditions have been applied on the pilot-scale sonicator which was used in combination with the UF treatment. According to the experimental results, the best configuration within the Baciacavallo WWTP was the sonication of non-ozonated wastewater followed by the UF. The combined treatment guaranteed the compliance with the target values for wastewater reuse in wet textile industries. This study is part of the Research Project PURIFAST (Purification of industrial and mixed wastewater by combined membrane filtration and sonochemical technologies) LIFE + ENV/IT/000439. © IWA Publishing 2011. Source

Ciabatti I.,Next Technology Tecnotessile | Tognotti F.,Next Technology Tecnotessile | Lombardi L.,Next Technology Tecnotessile
Desalination | Year: 2010

The use of potassium ferrate, K2FeO4, an environmentally-friendly chemical reagent containing iron in the + 6 oxidation state, has been investigated as a new approach for dyeing wastewater purification. The performance of this product, alone or in combination with a cationic organic polymer and/or power ultrasound, was compared to the traditional biological activated sludge process and a tertiary treatment featuring ozonation. Experimental tests showed that, thanks to its unique properties (high redox potential and simultaneous generation of ferric coagulating species), potassium ferrate can be successfully used in dyeing wastewater treatment. In fact, treatment with ferrate at the optimal dose of 70 mg/L as Fe(VI) was found to allow a high removal efficiency of relevant parameters such as turbidity, total suspended solids and chemical oxygen demand (COD). Whilst potassium ferrate alone had a minor effect on colour, the combination of ferrate with the organic polymer allowed a good decolourisation: this suggested the eventual application of this combined process for reuse of dyeing wastewater, resulting in environmental and economic benefits. The possibility of reusing the purified effluent in textile processes that do not require softened water was demonstrated through dyeing tests. © 2009 Elsevier B.V. All rights reserved. Source

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