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Yuhuang Wang Louise R. Giam Matt Park Steven Lenhert Harald Fuchs Chad A. Mirkin Sylwia Sekula Jeanette Fuchs Susanne Weg‐Remers Peter Nagel Stefan Schuppler Joe Fragala Nora Theilacker Matthias Franzreb Christer Wingren Peter Ellmark Carl A. K. Borrebaeck Chad A. Mirkin Harald Fuchs Steven Lenhert 《Small (Weinheim an der Bergstrasse, Germany)》2008,4(10)
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Marie‐Caroline Delhomnie Louise Bibeau Sbastien Roy Ryszard Brzezinski Michle Heitz 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2001,76(9):997-1006
Two identical laboratory‐scale bioreactors were operated simultaneously, each treating an input air flow rate of 1 m3 h?1. The biofilters consisted of multi‐stage columns, each stage packed with a compost‐based filtering material, which was not previously inoculated. The toluene inlet concentration was fixed at 1.5 g m?3 of air. Apart from the necessary carbon, the elements nitrogen, phosphorus, sulfur, potassium and other micro‐elements are also essential for microbial metabolism. These were distributed throughout the filter bed material by periodic ‘irrigations’ with various test nutrient solutions. The performance of each biofilter was quantified by determining its toluene removal efficiency, and elimination capacity. Nutrient solution nitrogen levels were varied from 0 to 6.0 g dm?3, which led to elimination capacities of up to 50 g m?3 h?1 being obtained for a toluene inlet load of 80 g m?3 h?1. A theoretical analysis also confirmed that the optimum nitrogen solution concentration lays in the range 4.0–6.0 g dm?3. Validation of the irrigation mode was achieved by watering each biofilter stage individually. Vertical stage‐by‐stage stratification of the biofilter performance was not detected, ie each filter bed section removed the same amount of pollutant, the elimination capacity per stage being about 16 g m?3 h?1 per section of column. © 2001 Society of Chemical Industry 相似文献
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The molecular design of semi‐inorganic polymers has produced polysilphenylene–siloxane and polyphosphazene elastomers having comparable fire safety to heat resistant engineering plastics. In flaming combustion a polyphosphazene rubber had a four times lower peak heat release rate than the polyurethane elastomer currently used in fire‐blocked aircraft seat cushions. The addition of expandable graphite flakes to polyurethane and polyphosphazene elastomers reduces their peak heat release rates by factors of seven and five, respectively. Published in 2003 by John Wiley & Sons, Ltd. 相似文献
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