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Inhibition of Sulfate Reduction by Iron, Cadmium and Sulfide in Granular Sludge by Blanca M. Gonzalez-Silva; Roberto Briones-Gallardo; Elías Razo-Flores; Lourdes B. Celis is a Environmental Science article available to read on EtoBox.

What is Inhibition of Sulfate Reduction by Iron, Cadmium and Sulfide in Granular Sludge about?

This study investigated the inhibition effect of iron, cadmium and sulfide on the substrate utilization rate of sulfate reducing granular sludge. A series of batch experiments in a UASB reactor were conducted with different concentrations of iron (Fe 2+ , 4.0-8.5 mM), cadmium (Cd 2+ , 0.53-3.0 mM) and sulfide (4.2-10.6 mM), the reactor was fed with ethanol at 1 g chemical oxygen demand (COD)/L and sulfate to yield a COD/SO 4 2-(g/g) ratio of 0.5. The addition of iron, up to a concentration of 8.1 mM, had a positive effect on the substrate utilization rate which increased 40% compared to the rate obtained without metal addition (0.25 g COD/g VSS-d). Nonetheless, iron concentration of 8.5 mM inhibited the specific substrate utilization rate by 57% compared to the substrate utilization rate obtained in the batch amended with 4.0 mM Fe 2+ (0.44 g COD/g VSS-d). Cadmium had a negative effect on the specific substrate utilization rate at the concentrations tested; at 3.0 mM Cd 2+ the substrate utilization rate was inhibited by 44% compared with the substrate utilization rate without metal addition. Cadmium precipitation with sulfide did not decrease the inhibition of cadmium on sulfate re

Who reads Inhibition of Sulfate Reduction by Iron, Cadmium and Sulfide in Granular Sludge?

Author

Blanca M. Gonzalez-Silva; Roberto Briones-Gallardo; Elías Razo-Flores; Lourdes B. Celis

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-3894)

Published

2009

Language

EN

Field

Environmental Science (Physical Sciences)