Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10395513 | Bioresource Technology | 2010 | 9 Pages |
Abstract
The removal of sulfate and organic matter was assessed in an ASBR, which treated wastewater containing 500 mg COD Lâ1 (3 g COD Lâ1 dâ1) in 8 h-cycles at 30 °C. The wastewater was enriched with sulfate at [COD/SO42-] ratios of 1.34, 0.67 and 0.34 (8.8,4.5and2.2gSO42-L-1d-1). For each COD/[SO42-] ratio fill times used were: 10 min (batch), 3 and 6 h (fed-batch), achieving sulfate reduction of 30%, 72% and 72% (COD/[SO42-] of 1.34); 25%, 58% and 55% (COD/[SO42-] of 0.67) and 23%, 37% and 27% (COD/[SO42-] of 0.34), respectively, and organic matter removal of 87%, 68% and 80% (COD/[SO42-] of 1.34); 78%, 75% and 69% (COD/[SO42-] of 0.67) and 85%, 84% and 83% (COD/[SO42-] of 0.34), respectively. The results showed that fed-batch operation improved sulfate reduction, whereas organic matter removals were similar for batch and fed-batch operation. In addition, increase in sulfate loading in the fed-batch operation improved organic matter removal.
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Authors
Gustavo Mockaitis, Gregor F. Friedl, José A.D. Rodrigues, Suzana M. Ratusznei, Marcelo Zaiat, Eugênio Foresti,