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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Nunes, Ramom R. [1] ; Bontempi, Rhaissa M. [1] ; Mendonca, Giovane [1] ; Galetti, Gustavo [2] ; Rezende, Maria Olimpia O. [1]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMIN; v. 51, n. 5, p. 271-277, MAY 3 2016.
Web of Science Citations: 2
Abstract

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)

FAPESP's process: 13/00744-0 - CHEMICAL AND SPECTROSCOPIC STUDY OF VERMICOMPOSTING DYNAMICS OF WASTE FROM LEATHER INDUSTRY (TANNERY) FOR PRODUCTION OF PLANTS WITH ECONOMIC INTEREST
Grantee:Ramom Rachide Nunes
Support Opportunities: Scholarships in Brazil - Doctorate