Biofiltration as a green technology for abatement of volatile organic compounds (VOCs): A synoptic review

Effect of (bio)surfactant type and concentration on the gas-liquid equilibrium partitioning of hydrophobic volatile organic compounds

“…The stock solution contained 5.28 mL cyclohexane, 10.3 mL pentane, 3.13 mL hexane and 1.01 mL heptane 64 in 100 mL methanol and was stored in a fridge at 4 °C. These volumes were calculated in each case so the 65 final water equilibrium concentration was maximally one-tenth of the maximum aqueous solubility [4]. In 66 this way, we ensured that the measurements were conducted in the range where Henry's law (here 67 represented as KGL: gas-liquid partitioning coefficient) is fulfilled (i.e.…”

“…Due to the diversity and wide range of concentrations (up to 100 g m -3 ) of VOCs present in waste gas streams, a broad range of technologies have been developed [3,4]. They are generally classified as destruction (e.g.…”

“…The most successful removal of VOCs in gas-phase bioreactors occurs for highly soluble compounds with low molecular weight [7]. Therefore, gas-phase bioreactors such as biotrickling filters, bioscrubbers and biofilters show low removal performances for hydrophobic VOCs, especially due to their low mass transfer and therefore, low bioavailability for the microorganisms [4,12].…”

“…Finally, to determine the volume of water needed in each bottle (5 mL and 115 mL, section 2.3) and thus 44 improve the precision of the method for the desired range of KGL, theoretical modeling was performed in 45 which the variance (σ 2 ) of KGL was estimated as a function of KGL. Such a procedure has been carried out 46 before but for compounds with a lower dimensionless KGL coefficient (0.0023 -13.5) [2][3][4]. 47…”

Isolation, Molecular Characterization, Optimization and Purification of Amylase Enzyme from Locally Isolated Bacillus Species in Different Regions of Munshiganj, Bangladesh

“…5 Because of their profitability, short fermentation cycle and usability, these strains are used in the production of industrial enzymes. 6 Various industries in our country use α-amylase to obtain high yields of products. 7,8 It has a large scale of applications for the production of glucose syrups, high fructose corn syrups, maltose syrups, and saccharification of starch in the brewery and bioethanol industry.…”