Electrooxidation as the anaerobic pre-treatment of fats: oleate conversion using RuO2 and IrO2 based anodes.
Electrochemical treatment of oleate using RuO2 and IrO2 type dimensionally stable anodes in alkaline medium was performed to develop a feasible anaerobic pre-treatment of fatty effluents. The results showed that the pre-treated solutions over RuO2 were faster degraded by anaerobic consortium than the raw oleate solutions or the electrolysed solutions using IrO2. In batch experiments carried out with pre-treated solutions over RuO2 (100-500mg/L), no lag phases were observed before the methane production onset. On the other hand, raw oleate and pre-treated oleate over IrO2 had originated lag phases of 0-140 and 0-210h, respectively. This study demonstrated that it is advantageous to apply the electrochemical treatment carried out on the RuO2 type DSA in order to achieve a faster biodegradation of lipid-containing effluent and consequently to obtain a faster methane production.
Gonçalves
M
M
Dept. Energias Renováveis, INETI, Est. Paço do Lumiar, 1649-038 Lisboa, Portugal. marta.goncalves@ineti.pt
Alves
M M
MM
Correia
J P
JP
Marques
I P
IP
D000693:Anaerobiosis; D001419:Bacteria / Q000187:drug effects; D001673:Biodegradation, Environmental; D004563:Electrochemistry; D004566:Electrodes; D005223:Fats / Q000378:metabolism*; D005290:Ferric Compounds / Q000737:chemistry* / Q000633:toxicity; D008697:Methane / Q000378:metabolism; D019301:Oleic Acid / Q000378:metabolism*; D010084:Oxidation-Reduction; D017975:Ruthenium Compounds / Q000737:chemistry* / Q000633:toxicity; D018675:Toxicity Tests
D005223:Fats; D005290:Ferric Compounds; D017975:Ruthenium Compounds; C029017:ruthenium dioxide; C000499:ferric oxide; D019301:Oleic Acid; D008697:Methane