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Vermicomposting as an advanced biological treatment for industrial waste from the leather industry

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Autor(es):
Nunes, Ramom R. [1] ; Bontempi, Rhaissa M. [1] ; Mendonca, Giovane [1] ; Galetti, Gustavo [2] ; Rezende, Maria Olimpia O. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Chem Sao Carlos, Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Ctr Biol Sci & Hlth, BR-13560 Sao Carlos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMIN; v. 51, n. 5, p. 271-277, MAY 3 2016.
Citações Web of Science: 2
Resumo

The leather industry (tanneries) generates high amounts of toxic wastes, including solid and liquid effluents that are rich in organic matter and mineral content. Vermicomposting was studied as an alternative method of treating the wastes from tanneries. Vermicompost was produced from the following tannery residues: tanned chips of wet-blue leather, sludge from a liquid residue treatment station, and a mixture of both. Five hundred earthworms (Eisenia fetida) were added to each barrel. During the following 135 days the following parameters were evaluated: pH, total organic carbon (TOC), organic matter (OM), cation exchange capacity (CEC), C:N ratio, and chromium content as Cr (III) and Cr (VI). The results for pH, TOC and OM contents showed decreases in their values during the composting process, whereas values for CEC and total nitrogen rose, indicating that the vermicompost reached maturity. For chromium, at 135 days, all values of Cr (VI) were below the detectable level. Therefore, the Cr (VI) content had probably been biologically transformed into Cr (III), confirming the use of this technique as an advanced biological treatment. The study reinforces the idea that vermicomposting could be introduced as an effective technology for the treatment of industrial tannery waste and the production of agricultural inputs. (AU)

Processo FAPESP: 13/00744-0 - Estudo químico e espectroscópico da dinâmica da vermicompostagem de resíduos da indústria de couro (curtumes) para produção de plantas de interesse econômico
Beneficiário:Ramom Rachide Nunes
Modalidade de apoio: Bolsas no Brasil - Doutorado