Fungal biofilters for toluene biofiltration: Evaluation of the performance with four packing materials under different operating conditions

Maestre, Juan P.; Gamisans, Xavier; Gabriel, David; Lafuente, Javier

doi:10.1016/j.chemosphere.2006.11.004

Cited by 103 publications

(57 citation statements)

References 18 publications

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“…It is widely accepted that compost and most natural organic media have enough nitrogen and phosphorous content for developing a process culture [7]. However, external nutrients supply in organic media biofilters has been reported as a common way to improve biofilters performance [6,19]. Thus, bioavailability of nutrients for microorganisms growth may play a major role for optimizing biofilters performance.…”

Section: Physical Properties Of Packing Materialsmentioning

confidence: 99%

“…Previous works studying packing materials are mostly based on a sole packing material case study [2][3][4] or on the comparison of the removal efficiency achieved by different packed biofilters under the same operating conditions [5,6]. In general, these studies concluded that high removal efficiencies in biofilters are strongly related to packing material properties although physical and chemical properties of the materials were not evaluated thoroughly.…”

Section: Introductionmentioning

confidence: 99%

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A comparative study based on physical characteristics of suitable packing materials in biofiltration

Dorado

Lafuente

Gabriel

et al. 2010

Environmental Technology

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In the present work, 10 packing materials commonly used as support media in biofiltration are analyzed and compared to evaluate their suitability according to physical characteristics. The nature of the packing material in biofilters is an important factor for the success in their construction and operation. Different packing materials have been used in biofiltration without a global agreement about which ones are the most adequate for biofiltration success. The materials studied were chosen according to previous works in the field of biofiltration including both organic and inorganic (or synthetic) materials. A set of nine different parameters were selected to cope with well-established factors such as material specific surface area, pressure drop, nutrients supply, water retentivity, sorption capacity and purchase cost. One ranking of packing materials was established per each parameter studied to define a relative suitability degree. Since biofiltration success generally depends on a combination of the ranked parameters, a procedure was defined to compare packing materials suitability under common situations in biofiltration. Selected scenarios such as biofiltration of intermittent loads of pollutant and biofiltration of waste gases with low relative humidity were investigated. The results indicate that, out of the packing materials studied, activated carbons were ranked on top of several parameter rankings and showed as a significantly better packing material when parameters were combined to assess such selected scenarios. Keywords: packing materials; biofiltration; Physical properties; Economical assessment IntroductionBiological treatments have become an effective and economical alternative to traditional gas treatment systems.The correct selection of the packing material employed in a biofilter or a biotrickling filter is an important decision to achieve high removal efficiencies and to maintain an optimal performance in the long-term run [1]. Despite the widely recognized importance of the support media role, several packing materials have been used in biofiltration under a wide range of operating conditions without a global agreement about which one is the most adequate.Previous works studying packing materials are mostly based on a sole packing material case study [2][3][4] or on the comparison of the removal efficiency achieved by different packed biofilters under the same operating conditions [5,6]. In general, these studies concluded that high removal efficiencies in biofilters are strongly related to packing material properties although physical and chemical properties of the materials were not evaluated thoroughly. The nature of the carrier material, which may be organic, natural inorganic or entirely synthetic, is a crucial factor for the successful application of biofilters and biotrickling filters because it affects the frequency at which the medium is replaced and other key factors such as bacterial activity and pressure drop across the bioreactor [7,8].Among the natural carriers reported, com...

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Section: Physical Properties Of Packing Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study based on physical characteristics of suitable packing materials in biofiltration

Dorado

Lafuente

Gabriel

et al. 2010

Environmental Technology

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“…The pH measured decreased slightly from the initial value of 8 until a value of 6 after 40 days of operation. In previous studies, Maestre et al (2007) modeled a biofilter treating toluene packed with coconut fiber and pine leaves where after 50 days of operation the pH dropped at values as low as 3. It was considered that the decrease in pH was in relation to the production of acidic by-products such as benzoic acid, which arise from toluene degradation.…”

Section: Sorption and Biodegradation Processes Interactionmentioning

confidence: 99%

Interaction between sorption and biodegradation in a biofilter packed with activated carbon

Dorado

Lafuente

Gabriel

et al. 2012

Water Science and Technology

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The main objective of this study is to evaluate qualitatively and quantitatively the effect of starvation periods in the biodegradation capacity of microorganisms when the support media is a material with high sorption capacity. Pollutant sorption and biodegradation, which occur simultaneously in the biofilter, describe the overall behavior of the air treatment system during normal operation and during starvation periods. Results obtained in the present study demonstrate that sorption capacity of the material not only plays an important role during the start-up of operation, but it is also important in the steady operation. Simultaneously, as biomass grows on the support, biodegradation becomes more decisive in the performance. It was found that zones of packing material with low moisture content are controlled by the sorption mechanism, at expenses of biodegradation, and they are essential as pollutant reservoir during starvation periods. In the present study a significant decrease in the biodegradation capacity of microorganisms immobilized on activated carbon were not observed as consequence of continuously load interruptions.

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“…Los medios filtrantes más comúnmente empleados son la turba, suelo y el compost seguido por las astillas de madera, caña de azúcar medios filtrantes que tienen una vida útil entre 3 a 5 años su bajo costo de adquisición, su alto contenido de nutrientes y la amplia densidad población de microorganismos (Chung el al., 2001;Maestre et al, 2007;Hwang et al, 2007;Gallastegui et al, 2011). El presente trabajo tuvo como objetivo de determinar la eficiencia de un biofiltro en la remoción del ácido sulfhídrico (H2S) remoción contenido en el biogás generado por un reactor anaerobio tipo UASB.…”

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Remoción de sulfuro de hidrogeno (h2s) contenido en el biogás, generado por un reactor anaerobio tipo uasb– diseño factorial 32.

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Chamorro²

2018

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Remoción de sulfuro de hidrogeno (h2s) contenido en el biogás, generado por un reactor anaerobio tipo uasb-diseño factorial 3 2 .Removal of hydrogen sulphide (h2s) contained in the biogas, generated by an anaerobic reactor type uasb-factorial design 3 2Cerrón Serpa Víctor; Matos Chamorro Alfredo EP Ingeniería de Alimentos, Universidad Peruana Unión ResumenEl objetivo de esta investigación fue la de determinar la eficiencia de un biofiltro para remover ácido sulfhídrico (H2S) contenidos en el biogás, generado por un reactor anaerobio tipo UASB para lo cual se evaluó el efecto de dos factores: Concentración de ácido sulfhídrico (41 -90 ppm, 91 -140 ppm y 141 -190 ppm) y el tiempo de residencia (10.80 s, 27 s, 43.20 s) en relación a la eficiencia de remoción (%). El diseño experimental utilizado fue el diseño factorial 3 2 más cuatro puntos centrales. El factor más significativo fue el tiempo de residencia (p=0.021943) y la mayor eficiencia de remoción de ácido sulfhídrico obtenida fue de 100% al operar el biofiltro a un mayor tiempo de residencia (43.20 s), además, se determinó que la concentración de sulfuro de hidrogeno no tuvo efecto significativo sobre la eficiencia de remoción.Palabras Clave: Eficiencia de remoción, tiempo de residencia, ácido sulfhídrico, concentración de H2S, biogás. AbstractThe objective of this research was to determine the efficiency of a biofilter to remove hydrogen sulfide (H2S) content in the biogas, generated by an anaerobic reactor UASB for which the effect of two factors were evaluated: concentration of hydrogen sulfide (41 -90 ppm, 91-140 ppm and 141-190 ppm) and residence time (10.80 s, 27 s, 43.20 s) in relation to the removal efficiency (%). The experimental design was a factorial design 3 2 and four central points. The most significant factor was the residence time (p = 0.021943) and the highest removal efficiency of hydrogen sulfide obtained was 100% when the biofilter was operating in a longer residence time (43.20 s) also was determined that the concentration hydrogen sulfide had no significant effect on the removal efficiency.

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Fungal biofilters for toluene biofiltration: Evaluation of the performance with four packing materials under different operating conditions

Cited by 103 publications

References 18 publications

A comparative study based on physical characteristics of suitable packing materials in biofiltration

A comparative study based on physical characteristics of suitable packing materials in biofiltration

Interaction between sorption and biodegradation in a biofilter packed with activated carbon

Remoción de sulfuro de hidrogeno (h2s) contenido en el biogás, generado por un reactor anaerobio tipo uasb– diseño factorial 32.

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