Circularity of Nutrients for Food Security: a Case Study of By-products from Meat Industry

Adriana Cioato Ferrazza (), José Uebi Maluf () and Edson Talamini ()
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Adriana Cioato Ferrazza: Universidade Federal do Rio Grande do Sul (UFRGS)
José Uebi Maluf: Universidade Estadual do Oeste do Paraná
Edson Talamini: Universidade Federal do Rio Grande do Sul (UFRGS)

Circular Economy and Sustainability, 2024, vol. 4, issue 1, 475-488

Abstract: Abstract The depletion of nutrients available in the soil is related to the long-term unsustainability of the food production system. Planetary biophysical limits make it urgent to adopt circularity practices that recover nutrients from being reused in production systems. The animal protein production system demands high amounts of nutrients, reducing the natural availability in the soil, increasing extraction from natural stocks, and dispersing nutrients abroad. However, nutrients can be recovered from slaughtered chicken by-products, such as mechanically separated meat residues and pre-hydrolyzed chicken bone. The present study compared the nutrients recovered from mechanically separated meat residues and pre-hydrolyzed chicken bone char by fast pyrolysis at 450 °C, 550 °C, and 650 °C. Results indicate that nitrogen, carbon, and chromium reduce as the pyrolysis temperature increases, while phosphorus, calcium, and magnesium increase. Nutrient recovery is less sensitive to pyrolysis temperature in pre-hydrolyzed chicken bone char than in mechanically separated meat residues-bone char (Tukey p

Keywords: Biochar; Biofertilizer; Circular economy; Recycling; Resource use efficiency (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s43615-023-00294-x

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