Effect of yeast extract on speciation and bioavailability of nickel and cobalt in anaerobic bioreactors
| Autor: | G. Gonzalez-Gil, H.P. van Leeuwen, Stefan Jansen, Marcel H. Zandvoort |
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| Rok vydání: | 2003 |
| Předmět: |
inorganic chemicals
Sulfide Laboratorium voor Fysische chemie en Kolloïdkunde complexation growth Inorganic chemistry Biological Availability Industrial Waste chemistry.chemical_element Bioengineering Saccharomyces cerevisiae Euryarchaeota Waste Disposal Fluid cathodic stripping voltammetry Applied Microbiology and Biotechnology Fungal Proteins Bioreactors Biogas Nickel Electrochemistry Bioreactor Yeast extract Anaerobiosis bacteria Physical Chemistry and Colloid Science metal speciation chemistry.chemical_classification WIMEK Chemistry Methanol dissolved copper natural-waters Cobalt chemical speciation Yeast methanosarcina Bioavailability kinetics Environmental chemistry Environmental Technology Milieutechnologie Methane Water Pollutants Chemical Biotechnology |
| Zdroj: | Biotechnology and Bioengineering, 82(2), 134-142 Biotechnology and Bioengineering 82 (2003) 2 |
| ISSN: | 1097-0290 0006-3592 |
| DOI: | 10.1002/bit.10551 |
| Popis: | The speciation of metals plays an important role in their bioavailability. In the case of anaerobic reactors for the treatment of wastewaters, the ubiquitous presence of sulfide leads to extensive precipitation of metals like nickel and cobalt, which are essential for the metabolism of the anaerobic microorganisms that carry out the mineralization of the pollutants present in the wastewater. In practice, nickel, cobalt, and iron are added in excessive amounts to full-scale installations. This study is concerned with the complexation of nickel and cobalt with yeast extract and its effect on the biogas production by methanogenic biomass. Adsorptive stripping voltammetry (AdSV) was used to get information about the stability and complexing capacity of the metal-yeast extract complexes formed. Nickel and cobalt form relatively strong organic complexes with yeast extract. The bioavailability of these essential metals in anaerobic batch reactors was dramatically increased by the addition of yeast extract. This is due to the formation of dissolved bioavailable complexes, which favors the dissolution of metals from their sulfides. Trace doses of yeast extract may be effective in keeping additions of essential metals to anaerobic reactors at a minimum. |
| Databáze: | OpenAIRE |
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