13 documents found, page 1 of 2
Life cycle assessment of bacterial cellulose and comparison to other cellulosic...
Soares da Silva, F. A. G.; Branco, Sara; Dourado, Fernando; Neto, Belmira; Gama, F. M.Bacterial cellulose (BC) is a 3D exopolysaccharide synthesized by certain acetic acid bacteria, possessing unique properties such as nanofibrillar morphology and high purity. BC has gained increasing attention for several potential market applications, including in textiles. However, along with techno-economic challenges, the industrialization of BC pulp must align with sustainable practices and minimize the en...
Performance of bacterial nanocellulose packaging film functionalised in situ wi...
Soares da Silva, F. A. G.; Carvalho, Teresa Bento de; Dourado, Fernando; Gama, F. M.; Teixeira, Paula; Poças, FátimaZinc oxide nanoparticles (ZnO) are cost-effective antimicrobial agents with great potential for the active packaging industry. Bacterial NanoCellulose (BNC) features a porous fibre network, with high absorption capacity, flexible and with good mechanical properties, suitable as a carrier of active agents. In this work, BNCZnO films were developed and optimized regarding the particle size and ZnO concentration. ...
Regenerated bacterial cellulose fibres
Soares da Silva, F. A. G.; Meister, Frank; Dourado, Fernando; Gama, F. M.The global shortage of cotton for textile production, forces the exploitation of forests´ lignocellulosic biomass to produce man-made cellulosic fibres (MMCF). This has a considerable environmental impact, pressing the textile industry to search for new sustainable materials and to the development of sustainable recycling processes. Bacterial cellulose (BC), an exopolysaccharide produced by fermentation, could ...
Development of bacterial cellulose composites for food packaging and textiles
Soares da Silva, F. A. G.; Dourado, Fernando; Hummel, M.; Poças, F.; Gama, F. M.Most of all petroleum-based materials are used for a short period of time but then take centuries to degrade. Food packaging and textile are examples of industries that are truly dependent of synthetic materials. Therefore, there is an increasing interest on seeking alternatives to these materials. Plant nanocellulose (PNC) has been actively studied, yet the high demand may arise environmental issues such defor...
Optimization and characterization of bacterial nanocellulose produced by Komaga...
Jacek, Paulina; Soares da Silva, F. A. G.; Dourado, Fernando; Bielecki, Stanislaw; Gama, F. M.In this work, a novel Bacterial NanoCellulose (BNC) producing strain, from Kombucha tea, was isolated and characterized. Based on 16S rRNA analysis the strain was identified as Komagataeibacter rhaeticus. Under static culture, K. rhaeticus K3 produces membranes with a relaxed structure, as observed by Scanning Electron Microscopy (SEM). The addition of 2% (v/v) ethanol to the culture media enhanced by more than...
Nanocellulose bio-based composites for food packaging
Soares da Silva, F. A. G.; Dourado, Fernando; Gama, F. M.; Poças, FátimaThe food industry is increasingly demanding advanced and eco-friendly sustainable packaging materials with improved physical, mechanical and barrier properties. The currently used materials are synthetic and non-degradable, therefore raising environmental concerns. Consequently, research efforts have been made in recent years towards the development of bio-based sustainable packaging materials. In this review, ...
Study and valorisation of wastewaters generated in the production of bacterial ...
Soares da Silva, F. A. G.; Oliveira, João Vítor; Felgueiras, Catarina; Dourado, Fernando; Gama, F. M.; Alves, M. M.Two culture media were tested for the production of bacterial nanocellulose (BNC) under static culture fermentation, one containing molasses (Mol-HS), the other molasses and corn steep liquor (Mol-CSL), as a source of carbon and nitrogen, respectively. These are low-cost nutrients widely available, which provide very good BNC productivities. However, the use of these substrates generates wastewaters with high o...
Optimization of bacterial nanocellulose fermentation using lignocellulosic resi...
Soares da Silva, F. A. G.; Dourado, Fernando; Ferreira, Eugénio C.; Poças, F.; Gama, F. M.In papermaking industry, significant fraction of fibres that cannot be re-utilized are wasted, which raise economic and environmental concerns[1]. On the other hand, development of renewable polymeric materials became a priority for the sustainability of several industries. Bacterial nanocellulose (BNC), a biopolymer extruded by Gluconacetobacter xylinus as a 3D nanofibrillar network, provide interesting proper...
Response surface statistical optimization of bacterial nanocellulose fermentati...
Rodrigues, Ana Cristina; Fontão, A.; Leal, Marta; Soares da Silva, F. A. G.; Coelho, Aires; Wan, Yizao; Dourado, Fernando; Gama, F. M.This work aimed at the optimization of bacterial nanocellulose (BNC) production by static culture, using Komagataeibacter xylinus BPR 2001 (K. xylinus). Response surface methodology - central composite design was used to evaluate the effect of inexpensive and widely available nutrient sources, namely molasses, ethanol, corn steep liquor (CSL) and ammonium sulphate, on BNC production yield. The optimized paramet...
Study and valorisation of wastewaters generated in the production of bacterial ...
Soares da Silva, F. A. G.; Oliveira, João V.; Gonçalves, C.; Dourado, Fernando; Gama, F. M.; Alves, M. M.[Excerpt] The use of low-cost residues from the agro-food industries in the formulation of fermentation culture media is often claimed to represent a strategy to reduce the production cost Bacterial NanoCellulose (BNC). However, the impact of such culture media, e.g. made of molasse and corn steep liquor, on the organic load of the wastewaters generated in this process has never been assessed. This work aims to...