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Publicação
Food By-Product Valorization by Using Plant-Based Coagulants Combined with AOPs for Agro-Industrial Wastewater Treatment
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Orientador(es)
Resumo(s)
Re-using and adding value to by-products is one of the current focuses of the agri-food
industry, following the Sustainable Development Goals of United Nations. In this work, the byproducts
of four plants, namely chestnut burr, acorn peel, olive leaf, and grape stem were used as
coagulants to treat elderberry wastewater (EW), a problematic liquid effluent. EW pre-treatment using
these natural coagulants showed promising results after pH and coagulant dosage optimization.
However, the decrease in total organic carbon (TOC) was not significant, due to the addition of
the plant-based natural coagulants which contain carbon content. After this pre-treatment, the
photo-Fenton advanced oxidation process was selected, after preliminary assays, to improve the
global performance of the EW treatment. Photo-Fenton was also optimized for the parameters of
pH, H2O2, Fe2+, and irradiance power, and the best conditions were applied to the EW treatment.
Under the best operational conditions defined in the parametric study, the combined results of
coagulation–flocculation–decantation (CFD) and photo-Fenton for chestnut burr, acorn peel, olive
leaf, and grape stem were, respectively, 90.2, 89.5, 91.5, and 88.7% for TOC removal; 88.7, 82.0, 90.2
and 93.1%, respectively, for turbidity removal; and finally, 40.6, 42.2, 45.3, and 39.1%, respectively, for
TSS removal. As a final remark, it is possible to suggest that plant-based coagulants, combined with
photo-Fenton, can be a promising strategy for EW treatment that simultaneously enables valorization
by adding value back to food by-products
Descrição
Palavras-chave
circular economy by-products reuse plant-based coagulants wastewater treatment coagulation–flocculation–decantation photo-Fenton
Contexto Educativo
Citação
Martins, R.B.; Jorge, N.; Lucas, M.S.; Raymundo, A.; Barros, A.I.R.N.A.; Peres, J.A. Food By-Product Valorization by Using Plant-Based Coagulants Combined with AOPs for Agro-Industrial Wastewater Treatment. Int. J. Environ. Res. Public Health 2022, 19, 4134
Editora
MDPI