Article ID Journal Published Year Pages File Type
10395513 Bioresource Technology 2010 9 Pages PDF
Abstract
The removal of sulfate and organic matter was assessed in an ASBR, which treated wastewater containing 500 mg COD L−1 (3 g COD L−1 d−1) 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.
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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