Biofiltration of H 2 S in air—Experimental comparisons of original packing materials and modeling

Abstract

a b s t r a c tThe treatment of hydrogen sulfide using a biofilter packed with expanded schist and topped with a layer of a synthetic nutritional material (UP20) was examined at a constant H 2 S concentration (100 ppmv). The impact of the empty bed residence time (EBRT) on process performances was clearly underlined by varying the polluted air flow from 4 to 20 m 3 h −1 corresponding to a variation in the EBRT from 63 to 13 s. Complete H 2 S degradation was observed when the EBRT was higher than 51 s. Experimental data collected at various EBRTs (13-63 s) were fitted using the Ottengraf model equations. The ␣ lump parameter value was found to be 26.4 g 1/2 m −3/2 h −1 . This single parameter, which enables the performance of the biofilter as a whole to be characterized whatever its composition (mixture or layers of different packing materials) and whatever the EBRT, is a powerful tool to compare packing materials and to design such bioreactors. The ␣ lump value characterizing the performances of expanded schist coupled with a thin layer of UP20 was higher than the ␣ lump values obtained for other packing materials (natural or synthetic) reported in previous studies.

Sulphide removal from liquid using biofilm on packed bed of salak fruit seeds

“…Figure 5 also shows that the lower the flow rate, the higher the RE would be. This result is similar to the research of Jaber et al [8] which showed that decreasing the loading rate from 39.6 g m -3 h -1 to 9.9 g m -3 h -1 could increase RE from 45% to 100%.…”

“…Spigno and Nicolella [7] presented the model consist of mass balance equations and accounting for reaction, mass transfer and axial dispersion to describe the steady-state degradation of phenol in a biofilter. Meanwhile Jaber et al [8] were derived the α lump parameter which enables the performance of the bio-filter as a whole to be characterized whatever its composition (mixture or layers of different packing materials) and whatever the EBRT (empty bed residence time).…”

Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter

“…The kinetic constant was in the range between 0.0025 and 0.0092 s −1 . To our knowledge, Ottengraf's model has not be applied to biogas desulfurization, although studies on H 2 S removal from air have been modeled using Ottengraf's model [30][31][32][33].…”

Biodegradation of sulphide in biogas by biofilm on salak fruit seeds: The effect of intra-film-gradient

“…Some previous researchers who have done modelling in the process of gas and liquid waste handling using biofilters include Spigno et al [18] in the elimination of phenol, Majumder et al [19] in the process of removal of divalent copper dissolved in water, Jaber et al [20] in modelling bio-filters for hydrogen sulphide contained in the air, Meena et al [21] makes the mathematical modelling of the separation of a mixture of hydrophilic (methanol) and hydrophobic (α-Pinene), Santos et al [22] used a mathematical model for the removal of hydrogen sulphide by oxidation in the bio-filter, Kim and Deshusses [23] calculate the mass transfer coefficient on the packing material used for bio-filter, either in the gas layer or the liquid layer. Furthermore Yang et al [24] makes modelling of porosity variations of bio-filter equipment used in rotary drum, Ramirez et al [25] studied the kinetics of microbial growth and biodegradation of methanol and toluene, De Visscher and Li [26] studied the disappearances modelling toluene contained in the air, Agarwal et al [27] studied the mass balance for phenol degradation events.…”