Growing concerns about industrial waste have intensified the search for practical reuse strategies in the construction industry. One of the most problematic types of waste is decommissioned wind turbine blades, which are tough, lightweight glass fibre composites that resist conventional recycling. In this study, shredded glass fibre-reinforced polymer (GFRP) recovered from such blades was used to partially replace the 2–8 mm fraction of natural aggregate in concrete at 10%, 20%, 30%, and 40% by volume. X-ray fluorescence (XRF) analysis showed that the material consists mainly of SiO₂, CaO, and Al₂O₃. X-ray computed tomography (XCT) revealed uneven fibre dispersion and a clear increase in porosity. Compared with the control mix, compressive strength reduced by 7–25%, splitting tensile strength by 18–24%, and elastic modulus by 17–35%. All mixes achieved watertightness class W12 (1.2 MPa), though the depth of water penetration increased with GFRP content. After 50 freeze–thaw cycles, frost-resistance class F50 was only met at 10% replacement. While these trends underline the performance trade-offs, they also point to a realistic route for diverting composite waste from landfills, reducing reliance on quarried aggregate and producing ‘green’ concretes for non-structural, prefabricated elements, where moderate strength is acceptable and reducing weight is advantageous.

Waste thermal treatment by incineration, co-incineration, gasification or pyrolysis aims at recovering the waste, mainly in the form of energy. In addition, it also serves to disposal of waste, in particular hazardous one, including medical and veterinary waste. Thermal treatment of waste should be carried out in specially adapted installations that meet the BAT requirements. The article discusses installations operating in Poland designed for thermal treatment of municipal solid waste, sewage sludge as well as hazardous waste, including medical and veterinary waste.

Details var a2a_config = a2a_config || {}; a2a_config.onclick = 1; a2a_config.locale = "pl"; a2a_config.color_main = "D7E5ED"; a2a_config.color_border = "9D9D9D"; a2a_config.color_link_text = "ffffff"; a2a_config.color_link_text_hover = "ffffff"; a2a_config.color_bg = "d9d9d9"; a2a_config.icon_color = "#4e4e4e"; a2a_config.exclude_services = ["dihitt", "delicious", "whatsapp", "dzone", "sms", "stumpedia", "viber", "yahoo_messenger", "google_plus"]; Details PDF BIBTEX RIS Title Wpływ właściwości fizykochemicznych stałych pozostałości z termicznego przekształcania osadów ściekowych na możliwość ich wykorzystania w ceramice czerwonej / The Influence of Incinerated Sewage Sludge Ashes Physical and Chemical Properties in Posibility of Usage in Red Ceramic Journal title Gospodarka Surowcami Mineralnymi - Mineral Resources Management Yearbook 2015 Volume vol. 31 Numer No 2 Authors Stempkowska, Agata ; Kępys, Waldemar ; Pietrzyk, Jacek Divisions of PAS Nauki Techniczne Publisher Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN ; Instytut Gospodarki Surowcami Mineralnymi i Energią PAN Identifier ISSN 0860-0953 DOI 10.1515/gospo-2015-0014

Combustion in fluidised bed boilers is one of the most commonly used methods of treatment of municipal sewage sludge. Fly ash (FA) and air pollution control (APC) residues are the solid by-products generated by flue gas treatment. There are significant differences in the chemical composition of these wastes. FA is composed of mainly SiO₂, P₂O₅, CaO and metals such as Zn, Ti, Cu, Cr, Pb and Ni. APC residues mainly contain SO₃ and Na₂O. The leachability tests that were carried out indicate that these wastes display very low leachability of heavy metals (for example leachability of Pb was equal 0.0004 mg·dm⁻³ in both wastes, leachability of Cd was equal 0.0012 mg·dm⁻³ in FA an 0.00004 mg·dm⁻³ in APC). On the other hand, very high sulphate concentrations (49,375 mg·dm⁻³) were found in water extract for the APC residues. In order to determine the toxicity of these wastes for plants, pot experiments with different additions of waste to the soil were carried out (on Lepidium sativum and Sinapis alba). Tests based on seeds germinations (on Lepidium sativum) in water extracts from waste (in different concentrations) were also performed. The results obtained indicate the very high toxicity of APC residues. Complete inhibition of germination and growth of the test plants was found for all concentrations of the tested waste in water extract and for all additions of waste to the soil in pot experiments. Seed germination tests on water extracts from FA did not show any toxicity of this waste. Pot tests with FA showed their toxicity only with a high (30%) addition in soil.

Due to the content of alkaline compounds, biomass combustion inflicts unfavourable effects on boilers, such as: corrosion, slagging, and fouling of the bed. One of the methods to limit these processes is adding sulphur to the boiler. This article presents the results of studies on the impact of adding sulphur into the boiler (where biomass is combusted), and on the properties of the formed fly ash and bottom ash. As a result, sulphur compounds were mainly in fly ash, which makes it impossible to utilize it in the manner that coal fly ash is normally used.