Behavior of the anaerobic treatment of tannery wastewater at different initial pH values and sulfate concentrations

Lorna Guerrero, ROLANDO ARTURO CHAMY MAGGI, DAVID ALEJANDRO JEISON NUÑEZ, Silvio Montalvo, César Huiliñir

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15 Scopus citations

Abstract

The influence of initial pH and sulfate concentration on the anaerobic digestion of tannery wastewater was studied using the specific methanogenic activity (SMA) test. The SMA tests were performed with a chemical oxygen demand (COD) concentration of 6.5 g/L and SO -2 4 concentrations of 1.95, 3.90, 6.50, 8.45 and 10.4 g/L. The effect of pH was studied at pH 6.8; 6.4 and 6.1. It was found that methane production took place under all conditions, but the use of SO -2 4 concentrations higher than 8.45 g/L and initial pH levels lower than 6.4 caused a decrease of up to 73% of methane production. The influence of pH was significant only for SO -2 4 concentrations lower than 8.45 g/L, with up to 50% inhibition. Specific methanogenic activity for COD/SO -2 4 ratios lower than 0.77 depends basically on this ratio and not on the initial pH value under the conditions of the study.

Original languageEnglish
Pages (from-to)1073-1078
Number of pages6
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume48
Issue number9
DOIs
StatePublished - 15 Jul 2013

Keywords

  • Anaerobic treatment
  • Methanogenic activity
  • pH
  • Sulfate
  • Tannery wastewater

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