Character of Extracellular Polymeric Substances and Soluble Microbial Products and Their Effect on Membrane Hydraulics During Airlift Membrane Bioreactor Applications

The effect of extracellular polymeric substances and soluble microbial products developed from wastewater and mature landfill leachate biomass was assessed using a pilot-scale membrane bioreactor operating polymeric and ceramic air-lift sidestream multichannel membranes. The plant was operated under...

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Veröffentlicht in:Water environment research 2008-12, Vol.80 (12), p.2193-2201
Hauptverfasser: Alvarez-Vazquez, Hector, Pidou, Marc, Holdner, Jennifer, Judd, Simon J.
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creator Alvarez-Vazquez, Hector
Pidou, Marc
Holdner, Jennifer
Judd, Simon J.
description The effect of extracellular polymeric substances and soluble microbial products developed from wastewater and mature landfill leachate biomass was assessed using a pilot-scale membrane bioreactor operating polymeric and ceramic air-lift sidestream multichannel membranes. The plant was operated under identical conditions of sludge retention time, system hydrodynamics , and parity of food-to-microorganism ratios. Biomass samples were extracted and fractionated (fixed and bound material, carbohydrate and protein extracts) and chemically and physically analyzed with the feedwaters. Both ceramic and polymeric membranes were tested and the critical flux (Jc) determined according to the classical flux-step analysis. Although permeability (K) of both materials reduced with increasing (by a factor of 1.2 and 3.2 for wastewater and leachate, respectively, at J of 30 L·m⁻² ·h⁻¹) and lower fouling rate (dP/dt) (by more than an order of magnitude at the same J) than the polymeric membrane. Evidence suggests that deterioration of membrane permeability resulting from leachate biomass arises from the feedwater itself, rather than the products derived from the biomass, and that colloidal and/or soluble total organic carbon is primarily responsible for it. Water Environ. Res., 80, 2193 (2008).
doi_str_mv 10.2175/106143008X304721
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Psychology ; General purification processes ; General treatment and storage processes ; Landfills ; Membranes ; Methods. Procedures. 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Res., 80, 2193 (2008).</description><subject>Activated sludge</subject><subject>Applied sciences</subject><subject>Behavior</subject><subject>Biodegradation, Environmental</subject><subject>Biological and medical sciences</subject><subject>BIOLOGICAL TREATMENT</subject><subject>Biomass</subject><subject>Biomass production</subject><subject>Bioreactors</subject><subject>Biotechnology</subject><subject>Carbohydrates</subject><subject>Ceramic materials</subject><subject>Ceramics</subject><subject>Chemical compounds</subject><subject>Chemical engineering</subject><subject>Chemical oxygen demand</subject><subject>colloids</subject><subject>Compressed air</subject><subject>critical flux (J C)</subject><subject>Exact sciences and technology</subject><subject>extracellular polymeric substances</subject><subject>Filtration - instrumentation</subject><subject>Filtration - methods</subject><subject>Fouling</subject><subject>fouling rate (d P/d t)</subject><subject>Fundamental and applied biological sciences. 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The plant was operated under identical conditions of sludge retention time, system hydrodynamics , and parity of food-to-microorganism ratios. Biomass samples were extracted and fractionated (fixed and bound material, carbohydrate and protein extracts) and chemically and physically analyzed with the feedwaters. Both ceramic and polymeric membranes were tested and the critical flux (Jc) determined according to the classical flux-step analysis. Although permeability (K) of both materials reduced with increasing (by a factor of 1.2 and 3.2 for wastewater and leachate, respectively, at J of 30 L·m⁻² ·h⁻¹) and lower fouling rate (dP/dt) (by more than an order of magnitude at the same J) than the polymeric membrane. Evidence suggests that deterioration of membrane permeability resulting from leachate biomass arises from the feedwater itself, rather than the products derived from the biomass, and that colloidal and/or soluble total organic carbon is primarily responsible for it. Water Environ. Res., 80, 2193 (2008).</abstract><cop>Alexandria, VA</cop><pub>Water Environment Federation</pub><pmid>19146096</pmid><doi>10.2175/106143008X304721</doi><tpages>9</tpages></addata></record>
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subjects Activated sludge
Applied sciences
Behavior
Biodegradation, Environmental
Biological and medical sciences
BIOLOGICAL TREATMENT
Biomass
Biomass production
Bioreactors
Biotechnology
Carbohydrates
Ceramic materials
Ceramics
Chemical compounds
Chemical engineering
Chemical oxygen demand
colloids
Compressed air
critical flux (J C)
Exact sciences and technology
extracellular polymeric substances
Filtration - instrumentation
Filtration - methods
Fouling
fouling rate (d P/d t)
Fundamental and applied biological sciences. Psychology
General purification processes
General treatment and storage processes
Landfills
Membranes
Methods. Procedures. Technologies
Microfluidics
Others
Permeability
permeability (K)
Pollution
Polymers
Pressure transducers
Reactors
Refuse Disposal - methods
soluble microbial products
Various methods and equipments
Waste Disposal, Fluid - instrumentation
Wastes
Wastewater
Wastewater treatment
Wastewaters
Water treatment and pollution
title Character of Extracellular Polymeric Substances and Soluble Microbial Products and Their Effect on Membrane Hydraulics During Airlift Membrane Bioreactor Applications
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