USE OF A GRIFFITH TUBE TO EVALUATE THE ANAEROBIC SLUDGE SEDIMENTATION IN A UASB REACTOR TREATING AN EFFLUENT WITH LONG-CHAIN FATTY ACIDS
| Autor: | Luiz Olinto Monteggia, Luis Alcides Schiavo Miranda, Ana Luiza de Oliveira Borges |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Lodo
Tratamento [Águas residuais] Anaerobic respiration General Chemical Engineering Sodium 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Adsorption Settling Sedimentação Ácidos graxos Long chain fatty acids Griffith tube lcsh:Chemical engineering Effluent 0105 earth and related environmental sciences Anaerobic process Waste management Anaerobic sludge Chemistry Tratamento anaeróbio Granule (cell biology) lcsh:TP155-156 Pulp and paper industry 020801 environmental engineering Sludge settleability UASB reactor Long chain Uasb |
| Zdroj: | Brazilian Journal of Chemical Engineering, Volume: 34, Issue: 1, Pages: 131-141, Published: JAN 2017 Brazilian Journal of Chemical Engineering, Vol 34, Iss 1, Pp 131-141 Brazilian Journal of Chemical Engineering v.34 n.1 2017 Brazilian Journal of Chemical Engineering Associação Brasileira de Engenharia Química (ABEQ) instacron:ABEQ Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
| Popis: | 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. Keywords : Anaerobic process; UASB reactor; Long chain fatty acids; Griffith tube; Sludge settleability. INTRODUCTION Anaerobic wastewater treatment biotechnology has been greatly advanced by the development of the upflow sludge bed reactor concept, such as the up-flow anaerobic sludge bed (UASB) (Kim |
| Databáze: | OpenAIRE |
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