Performance evaluation of a compost biofilter treating toluene vapours

Rene, Eldon R.; Murthy, D. V. S.; Swaminathan, T.

doi:10.1016/j.procbio.2004.12.010

Cited by 125 publications

(81 citation statements)

References 22 publications

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“…After this change, RE ranged between 97.7% and 99.9% and desorption was no longer observable. Figure 5 shows the comparison of toluene EC versus toluene IL obtained in this study and some data close to indoor air conditions from the literature (Moe and Li, 2005;Ondarts et al, 2010a;Tang and Hwang, 1997;Abumaizar et al, 1996;Mathur et al, 2007;Oh et al, 2009;Eldon et al, 2005;Delhoménie et al, 2002;Alvarez-Hornos et al, 2008;Lebrero et al, 2012;Gallastegui et al, 2013).…”

Section: Biofilter Treatmentsupporting

confidence: 74%

A hybrid biological process of indoor air treatment for toluene removal

Hort

Platel

Sochard

et al. 2014

Journal of the Air & Waste Management Association

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Bioprocesses, such as biofiltration, are commonly used to treat industrial effluents containing volatile organic compounds (VOCs) at low concentrations. Nevertheless, the use of biofiltration for indoor air pollution (IAP) treatment requires adjustments depending on specific indoor environments. Therefore, this study focuses on the convenience of a hybrid biological process for IAP treatment. A biofiltration reactor using a green waste compost was combined with an adsorption column filled with activated carbon (AC). This system treated a toluene-micropolluted effluent (concentration between 17 and 52 µg/m 3 ), exhibiting concentration peaks close to 733 µg/m 3 for a few hours per day. High removal efficiency was obtained despite changes in toluene inlet load (from 4.2 × 10 −3 to 0.20 g/m 3 /hr), which proves the hybrid system's effectiveness. In fact, during unexpected concentration changes, the efficiency of the biofilter is greatly decreased, but the adsorption column maintains the high efficiency of the entire process (removal efficiency [RE] close to 100%). Moreover, the adsorption column after biofiltration is able to deal with the problem of the emission of particles and/or microorganisms from the biofilter.Implications: Indoor air pollution is nowadays recognized as a major environmental and health issue. This original study investigates the performance of a hybrid biological process combining a biofilter and an adsorption column for removal of indoor VOCs, specifically toluene.

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Section: Biofilter Treatmentsupporting

confidence: 74%

A hybrid biological process of indoor air treatment for toluene removal

Hort

Platel

Sochard

et al. 2014

Journal of the Air & Waste Management Association

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“…Among these VOCs, toluene is a hazardous chemical, which is highly toxic and mutagenic (Gallastegui et al 2011), even when it was exposed to low concentration. Toluene is carcinogenic, the liver, kidney and the central nervous system could be damaged by it (Rene et al 2005). According to the report of operating facilities in 2009, the rate of toluene emission into the atmosphere was 12.2 kt/yr in the USA, and 3.9 kt/yr in Canada (Gallastegui et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Biofilter for treating toluene vapors: Performance evaluation and microbial counts behavior

Zhu

Luo

et al. 2016

Preprint

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A lab-scale biofilter packed with mixed packing materials was used for degradation of the toluene. Three gas flow rates, i.e. 0.1, 0.2 and 0.4 m 3 /h, were tested for inlet concentration ranging from 0.2 to 1.2 g/m 3 . Removal efficiencies ranging from 45.6 to 97.3% and elimination capacities ranging from 4.95 to 61.07 g/(m 3 h) were observed depending on the inlet loading rates. Maximum elimination capacity of 35.95 g/(m 3 h) occurred at inlet loading rate of 45.87 g/(m 3 h). The lowest layer always had highest elimination capacity. Carbon dioxide concentrations and the microbial cell counts for bio-degraders followed toluene elimination capacities. Results of this study indicated that mixed packing materials could be considered as a potential biofilter carrier, with low pressure drop (less than 84.9 Pa/m), for treating air streams containing VOCs.

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“…Earlier studies (Rene et al 2005;Deshusses and Webster 2000) have reported that VOCs from polluted air streams can be controlled by traditional methods such as adsorption, condensation and incineration. Although these methods use simple techniques, they have certain implementation constraints which include high cost, unpredictable recoveries and difficulty in separating one or more VOCs for reuse/recycle (Jeong et al 2005;Miller and Fox 1993).…”

Section: Introductionmentioning

confidence: 99%

Photo-catalytic oxidation of individual and mixture of benzene, toluene and p-xylene

Dhada

Nagar

Sharma

2015

Int. J. Environ. Sci. Technol.

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Photo-catalytic degradation of volatile organic compounds [VOCs: benzene, toluene and p-xylene (BTX)] was investigated using a batch reactor having a TiO 2 (catalyst)-coated aluminum sheet and a source of UV light (sunlight or UV lamp). To study the photo-oxidation, experiments were conducted under the following configurations: (1) TiO 2 (m): microparticle (0.32-3.31 lm) and sunlight (2) TiO 2 (n): nanoparticle (0.80-4.70 nm) and sunlight, (3) TiO 2 (m) and UV lamp and (4) TiO 2 (n) and UV lamp. Degradation of BTX followed first-order decay for individual compounds. The degradation rate constant in min -1 cm -2 (coated surface area) was the highest for configuration (4) (benzene 1.07 9 10 -3 , toluene 1.36 9 10 -3 and p-xylene 2.93 9 10 -3 ) followed by configuration (2), thus indicating the importance of particle size of the catalyst in degradation. Degradation of BTX mixture did not follow first-order decay. Benzene was an intermediate product of oxidation of toluene. Benzene and toluene were intermediate products of oxidation of p-xylene. For degradation of BTX mixture, a mathematical model was proposed to predict concentrations as a function of time. Experimental and model results showed similar trends in BTX degradation. The model accounted for increases in mass of toluene and benzene due to the degradation of p-xylene.

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Performance evaluation of a compost biofilter treating toluene vapours

Cited by 125 publications

References 22 publications

A hybrid biological process of indoor air treatment for toluene removal

A hybrid biological process of indoor air treatment for toluene removal

Biofilter for treating toluene vapors: Performance evaluation and microbial counts behavior

Photo-catalytic oxidation of individual and mixture of benzene, toluene and p-xylene

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