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The Composting of Water Hyacinth: A Life Cycle Assessment Perspective
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Orientador(es)
Resumo(s)
Water hyacinth is an invasive species that causes eutrophication in lentic waters. While mechanical removal is effective, it generates hazardous waste with biological contamination risk. Composting is a safe waste treatment option, inhibiting seeds and yielding agriculturally suitable compost. Life cycle assessment evaluated the environmental impacts of six composting piles using eight different by-products (potato peel, cattle manure, wood chip, rice straw, potato leftovers, olive pomace and biochar), all formulations containing water hyacinth. The worst environmental performances were the M2 pile (water hyacinth + olive pomace + cattle manure + potato leftovers) which achieved the highest AP (47.33 kg SO<jats:sub>2</jats:sub> eq.) and EP (10.56 kg PO<jats:sub>4</jats:sub>³<jats:sup>−</jats:sup> eq.), while M3 (water hyacinth + olive pomace + rice straw + potato leftovers) had the highest GWP (816.51 kg CO<jats:sub>2</jats:sub> eq.) and OLD (2.99E-11 kg R11 eq.). The biological composting process contributed the most to the overall increase in the impact categories for all piles due to air emissions (CH<jats:sub>4</jats:sub> and N<jats:sub>2</jats:sub>O). M3 and M5 (water hyacinth + wood chip) had the worst performance in fossil fuel consumption due to distances travelled from by-products and energy use in the maintenance of composting piles. Concerning packaging, Big Bags with polypropylene had a greater impact than polyethylene bags (50 kg capacity). Evaluating the potential avoidance of mineral fertilisers, M3 compost showed potential for reducing TSP fertiliser production by 46%. Overall, M4, which incorporated a mixture of water hyacinth, olive pomace, wood chips and biochar, was the most favourable option from an environmental point of view.
Descrição
Palavras-chave
Compost Waste By-product Impact categories Invasive species Biological process
Contexto Educativo
Citação
Serafini, Lais Fabiana; Arrobas, Margarida; Rodrigues, Manuel Ângelo; Feliciano, Manuel; Miguens, Filomena; Oliveira, Verónica; Santos, Daniela; Diaz De Tuesta, Jose Luis; Gonçalves, Artur (2025). The Composting of Water Hyacinth: A Life Cycle Assessment Perspective. Waste and Biomass Valorization. ISSN 1877-2641. 16:1, p. 507-523
Editora
Springer