Technical and environmental assessment of multiple rate applications of green foundry sand waste to matured compound obtained from an automated process
This study presents the results of the addition of different rates of waste green foundry sand (WGFS) and commercial substrate to a compost, obtained from the composting of organic solid waste (OSW) segregated from urban solid waste. The WGFS, as it has a sandy texture, due to silica (SiO2), when used directly in the soil, makes it more permeable, causing its impoverishment due to a greater leaching of nutrients. The OSW, when disposed directly on the soil, generates leachate, biogas and water contamination. Currently, in Brazil, most OSW is sent to sanitary landfills and WGFS to non-hazardous industrial landfills. However, the high cost, the scarcity of areas and the increasingly demanding legislation for the disposal of this waste, have led industries and municipalities to seek alternatives for the reuse of WGFS and treatment of OSW. The methodology of this work begins with obtaining a compost produced from a composting system with automated monitoring of temperature, aeration rate and humidity. After obtaining this product, it was mixed with different rates of WGFS and commercial substrate and later the fertility of these materials was evaluated. To verify the use of these mixtures in agriculture, the nutrients of the plant tissue of Avena Strigosa Schreb (black oat) cultivated in these media were evaluated. The results indicate that there is the potential for using these mixtures as a plant substrate at a rate of 10-20% WGFS or as a corrective for soil acidity at a rate of 10-30% WGFS.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | por |
| Published: |
AIDIS / Instituto de Ingeniería, Universidad Nacional Autónoma de México
2024
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| Online Access: | https://www.revistas.unam.mx/index.php/aidis/article/view/86820 |
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