Analysis of submerged membrane for a sludge-bed anaerobic membrane bioreactor treating prehydrolysis liquor
Autor: | Mayur Milan Kale, Kripa S. Singh |
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Rok vydání: | 2016 |
Předmět: |
Biofouling
Sodium Hypochlorite Surface Properties 02 engineering and technology 010501 environmental sciences Waste Disposal Fluid 01 natural sciences chemistry.chemical_compound Bioreactors Bioreactor Sodium Hydroxide Environmental Chemistry Lignin Anaerobiosis Dissolving pulp Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Chromatography Sewage Fouling Membrane fouling food and beverages Membranes Artificial General Medicine 021001 nanoscience & nanotechnology Equipment Failure Analysis Membrane chemistry 0210 nano-technology Citric acid |
Zdroj: | Environmental Technology. 37:1883-1894 |
ISSN: | 1479-487X 0959-3330 |
Popis: | An analysis of foulants and the performance of membranes in innovative sludge-bed anaerobic membrane bioreactors (SB-AnMBRs) were evaluated at mesophilic (35°C for approx. 400 days) followed by thermophilic (55°C for approx. 400 days) temperatures while treating the prehydrolysis liquor (PHL) waste stream from a dissolving pulp production plant. The membrane fouling of SB-AnMBR was analyzed for 0.1, 0.15 and 0.2 m(3)/m(2)/d flux conditions. Physico-chemical analyses of the membrane showed that the combination of 5% citric acid, 0.5% NaOCl and 2% NaOH solutions was effective in achieving more than 80% recovery of membrane flux. Chemical characterization of foulants showed that proteins were more predominant in membrane fouling than carbohydrates. Sugars and lignin contribution were negligible as compared to proteins in the total organic carbon content of the foulant. Membrane fouling occurred through a biofilm-dominated process and organic fouling. Combination of cleaning chemicals which included 0.5% NaClO and 2% NaOH solutions was most effective in the removal of the organic foulants. SEM analysis showed the pictorial evolution of the impact of fouling on the pore openings and the effect of cleaning on the membrane surface. |
Databáze: | OpenAIRE |
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