Peer-reviewed articles 17,970 +



Title: MODIFICATION BY WASHING OF RECYCLED AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE FOR VERTICAL SUBSURFACE FLOW CONSTRUCTED WETLANDS

MODIFICATION BY WASHING OF RECYCLED AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE FOR VERTICAL SUBSURFACE FLOW CONSTRUCTED WETLANDS
Ondrej Zednik; Michal Kriska Dunajsky
10.5593/sgem2022V/4.2
1314-2704
English
22
4.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
As the planet’s population increases, pollution entering waterways increases, and the availability of non-renewable raw resource materials reduces. It is possible to reduce this pollution by constructing treatment wetlands, but these wetlands use significant amounts of natural aggregates. The question arises: is it not possible to replace non-renewable resources with recycled materials made from construction and demolition waste? This article examines the applicability of recycled building materials as filter media for vertical subsurface flow filters. The recycled aggregates of the 0–4 mm fraction are evaluated in terms of grain size and hydraulic conductivity. For the Czech Republic’s available raw recycled aggregates, washing methods are proposed to produce materials that meet the required grain size limits. Untreated aggregates contain a significant proportion of particles smaller than 0.063 mm (up to 21.8%), significantly reducing their hydraulic conductivity and preventing their use in water filtration. However, concrete and masonry aggregates with dust particle contents of 0.3% and 1.5% can be obtained through washing. The washed materials subsequently show an increase in hydraulic conductivity up to the required range of values, that is 10?4–10?3 m s?1. According to the evaluation carried out, it is possible to apply treated recycled materials to wastewater filtration. At the same time, the application of construction waste in constructed treatment wetlands creates opportunities to use fine recycled aggregates (0–4 mm) in these areas, which are currently limited, in the future.
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This article was supported by the internal grant of Brno University of Technology FASTJ-22-7863: Sustainable water resource management under climatic conditions in the Czech Republic.
conference
Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 06-08 December, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
75-82
06-08 December, 2022
website
8827
Construction and demolition waste, Recycled aggregates, Filter materials, Vertical flow constructed wetlands

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