The heritage woven objects could be analyzed for defects hidden to the naked eye using non-invasive and non-destructive ultrasonography techniques. Ultrasonography is able to offer information about altered areas, such as gasps, interruptions, discontinuances, narrowed areas, fiber breaks, different densities of the material, defects caused by natural or anthropic factors: improper storage and exposure conditions, the presence of microorganisms and traces of their activity, mechanical causes etc. By recycling of the cotton fibers from other decrepit materials, which are not directly usable, the recondition and rendition of the national and world cultural heritage of these refurbished objects would be accomplished. The impact on the environment is diminished compared to the case when new cotton fibers are created.

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The oldest use of polyphenols in the leather industry is based on their ability to stabilize collagen in the skin against rotting. Leather tanning processes are among the most polluting industrial sources in terms of undesirable and toxic parameters (COD, BOD, content of tannic acids, fats, sulphureous residues, chloride, chromium, suspended solids etc.). Tannic acid is a naturally occurring phenolic compound and is widely used in the tanning processes, being one of the main pollutants in leather industry derived wastewaters. Current paper explored the ability of HDPE carrier, functionalized with Cerioporus squamosus microbial strain, to reduce the residual concentration of five natural tannins, widely used in the tanning processes in leather industry: Quebracho, Chestnut, Mimosa, Myrobalan and Gambier, in concentration of 1% in the tested solution. Bio-augmentation experiment of the HDPE structures were carried out in an experimental laboratory installation, and treatment of each aqueous solution, was carried out for 7 straight days, and percentage reduction of residual tannins was calculated at 3 and 7 days. Results highlighted varying degrees of reduction of the residual tannin concentration in the solutions, depending on the tannin tested, the best efficiency being achieved against Myrobalan tannin, with a maximum percentage reduction in residual concentration of 41% after 7 days, followed by Mimosa tannin (34%-7 days), Quebracho (28%-7 days), Chestnut (22%-7 days) and Gambier (9.30%-7 days).