USE OF A GRIFFITH TUBE TO EVALUATE THE ANAEROBIC SLUDGE SEDIMENTATION IN A UASB REACTOR TREATING AN EFFLUENT WITH LONG-CHAIN FATTY ACIDS
AUTOR(ES)
Miranda, L. A. S., Borges, A. L. O., Monteggia, L. O.
FONTE
Braz. J. Chem. Eng.
DATA DE PUBLICAÇÃO
2017-01
RESUMO
Abstract This paper proposes to study the sedimentation characteristics of anaerobic sludge, by determining the settling velocity of sludge granules with the Griffith Tube. This is a simple, low-cost method, suitable for use in full-scale treatment plants. The settling characteristics of sludge from two laboratory-scale UASB reactors fed with saccharose and different concentrations of sodium oleate and sodium stereate were evaluated. Addition of fatty acids caused a gradual destabilization of the system, affecting overall performance. The sedimentation profile changed after addition of fatty acids to the synthetic substrate, decreased sedimentation velocity and increased granule diameter. This behaviour was attributed to the adsorption of fatty acids onto the granules, modifying the diameter, shape and density of these bioparticles.
Documentos Relacionados
- Inhibition of Methanogenesis from Acetate in Granular Sludge by Long-Chain Fatty Acids
- Very Long-Chain Fatty Acids in Yeast
- Long-chain fatty acids of Sporothrix (Sporotrichum) schenckii.
- Long-chain fatty acids of peptococci and peptostreptococci.
- Long-chain fatty acids activate calcium channels in ventricular myocytes.