Title: Performance evaluation of aerobic reactor and Sarcocornia perennis to reduce the COD and chloride of effluents from tanning sheepskins

Authors: Lorena Cortizo; Natalia Scelsio; Sergio Perotti; José Martegani; Laura López

Addresses: Centro de Investigación y Tecnología del Cuero, CIC-INTI, La Plata, Gonnet, 1897, Argentina ' INIBIOLP, Facultad de Ciencias Médicas, UNLP, La Plata 1900, Argentina ' Centro de Investigación y Tecnología del Cuero, CIC, INTI-Cuero, La Plata, Gonnet, 1897, Argentina ' Centro de Investigación y Tecnología del Cuero, CIC, INTI-Cuero, La Plata, Gonnet, 1897, Argentina ' Centro de Investigación y Tecnología del Cuero, CIC, INTI-Cuero, La Plata, Gonnet, 1897, Argentina

Abstract: Tannery is an industry that generates wastewater characterised by high levels of organic matter, chrome, dissolved solids, sulphides and high salinity. The aim of this work was to evaluate at laboratory scale, the decrease of chemical oxygen demand (COD) and salinity from effluents from tanning sheepskins, using physical chemical methods in primary treatment, and bioreactor and wetlands for secondary and tertiary treatment, respectively. Effluents were collected from tanning processes of sheepskins carried out on the Center of Research and Technology on leather tannery plant, La Plata, Argentina. Conventional primary treatments selecting coagulants and flocculants were employed. For secondary treatment, batch bioreactors were designed, and the maximum COD removal was 60-70%. For the tertiary treatment, wetlands at laboratory scale were employed. In this test wetlands were filled with granite stone, with and without the plant Sarcocornia perennis, and COD decreased on average by 64% additional and chlorides concentration decreased by around 15%.

Keywords: effluent; tannery; activated sludge; wetlands; Sarcocornia perennis.

DOI: 10.1504/IJENVH.2017.088125

International Journal of Environment and Health, 2017 Vol.8 No.4, pp.282 - 289

Received: 19 Aug 2016
Accepted: 26 Mar 2017

Published online: 08 Nov 2017 *

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