Effect of presence of hydrophilic volatile organic compounds on removal of hydrophobic n-hexane in biotrickling filters

Cheng, Yeting; Li, Xiang; Liu, Haiyang; Yang, Chunping; Wu, Shaohua; Du, Cheng; Nie, Liping; Zhong, Yuanyuan

doi:10.1016/j.chemosphere.2020.126490

Cited by 50 publications

(17 citation statements)

References 56 publications

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“…The EBCT of the exhaust gas in the BTFs was 30 s. A nutrient solution (pH = 7.0) with a flow rate of 125 mL/h was sprayed from the top of the BTFs and atomized into small droplets, which were used by the microorganisms and then discharged from the bottom of the BTFs. Nutrient solution and waste gas passed through the BTFs in countercurrent mode, which was different from the previous operation mode in which waste gas and nutrient solution flowed in the same direction. , The countercurrent operation mode can make the gas-liquid contact more complete and provide sufficient nutrition for microorganisms to improve the pollutant removal performance of the BTF. The ambient temperature was regulated by the air conditioner and maintained at 28 ± 2 °C during BTF operation.…”

Section: Materials and Methodsmentioning

confidence: 91%

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Lin

Wang³

et al. 2022

Environ. Sci. Technol.

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Emissions of n-alkanes are facing increasingly stringent management challenges. Biotrickling filtration in the presence of surfactants is a competitive alternative for the enhanced removal of n-alkanes. Herein, sodium dodecyl benzene sulfonate (SDBS) was added into the liquid phase feeding a biotrickling filter (BTF) to enhance the removal of various short-chain n-alkanes from n-hexane (C6) to methane (C1). The removal performance of C6–C1 and microbial response mechanisms were explored. The results showed that the removal efficiency (RE) of n-alkanes decreased from 77 ± 1.3 to 35 ± 5.6% as the carbon chain number of n-alkanes decreased from C6 to C1, under the conditions of an n-alkane inlet load of 58 ± 3.0 g/m3·h and EBCT of 30 s. The removal performance of n-alkanes was enhanced significantly by the introduction of 15 mg/L SDBS, as the RE of C6 reached 99 ± 0.7% and the RE of C1 reached 74 ± 3.3%. The strengthening mechanisms were that the apparent Henry’s law coefficient of n-alkanes decreased by 11 ± 1.4–30 ± 0.3%, and the cell surface hydrophobicity of microorganisms improved from 71 ± 5.6 to 87 ± 4.0% with the existence of SDBS. Moreover, the presence of SDBS promoted the succession and activity of the microbial community. The activities of alkane hydroxylase and alcohol dehydrogenase were 5.8 and 5.9 times higher than those without SDBS, and the concentration of the cytochrome P450 gene was improved 2.2 times. Therefore, the addition of SDBS is an effective strategy that makes BTF suitable for the removal of various n-alkanes from waste gas streams.

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Section: Materials and Methodsmentioning

confidence: 91%

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Lin

Wang³

et al. 2022

Environ. Sci. Technol.

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“…Similarly, the addition of a hydrophilic compound to the BTF can increase the efficiency of hydrophobic VOC removal. This can result in stimulated fungal growth and increased carbon demand of the microbial species inhabiting the biofilm (Cheng et al 2020), leading to co-metabolism of the hydrophilic compounds in the presence of hydrophobic compounds. However, despite the fact that the synergistic effects of simultaneous removal of hydrophilic and hydrophobic VOCs in biofiltration processes are known (Zhang et al 2006;Yang et al 2018), the molecular mechanisms of this improvement have not been identified yet.…”

Section: Application Of Fungi To Biofiltration Of Hydrophobic Compoundsmentioning

confidence: 99%

A state of the art review on the use of fungi in biofiltration to remove volatile hydrophobic pollutants

Marycz

Brillowska-Dąbrowska

Muñoz

et al. 2022

Rev Environ Sci Biotechnol

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The physical/chemical abatement of gas pollutants creates many technical problems, is costly and entails significant environmental impacts. Biological purification of off-gases is a cheap and ecologically safe way of neutralization of gas pollutants. Despite the recent advances, the main technological challenge nowadays is the purification of volatile organic compounds (VOCs) of hydrophobic character due to their low solubility in water. Among all known biological methods of air purification, the most cost-effective biodegradation of hydrophobic VOCs is conducted by biotrickling filters. In this context, fungi have gained an increasing interest in this field based on their ability to biodegrade hydrophobic VOCs. In addition, biotrickling filtration using fungi can support a superior hydrophobic VOC abatement when compared to the bacterial biofilters. This paper aims at reviewing the latest research results concerning biocatalytic activity of fungi and evaluating the possibilities of their practical application in biofiltration systems to remove hydrophobic VOCs.

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“…High moisture content can cause clogging in the top of BTF packing material. Therefore, similar to BFs, BTFs with packing material divided to several layers are also often designed [51][52][53]. This BTF construction can help to distribute contaminated gas and trickling liquid flow more uniformly.…”

Section: Biotrickling Filter Irrigation Systemsmentioning

confidence: 99%

Effects of Water Content and Irrigation of Packing Materials on the Performance of Biofilters and Biotrickling Filters: A Review

Danila¹,

Zagorskis²,

Januševičius³

2022

Processes

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Biofilters (BFs) and biotrickling filters (BTFs) are two types of bioreactors used for treatment of volatile organic compounds (VOCs). Both BFs and BTFs use packing materials in which various microorganisms are immobilised. The water phase in BFs is stationary and used to maintain the humidity of packing materials, while BTFs have a mobile liquid phase. Optimisation of irrigation of packing materials is crucial for effective performance of BFs and BTFs. A literature review is presented on the influence of water content of packing materials on the biofiltration efficiency of various pollutants. Different configurations of BFs and BTFs and their influence on moisture distribution in packing materials were discussed. The review also presents various packing materials and their irrigation control strategies applied in recent biofiltration studies. The sources of this review included recent research articles from scientific journals and several review articles discussing BFs and BTFs.

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Effect of presence of hydrophilic volatile organic compounds on removal of hydrophobic n-hexane in biotrickling filters

Cited by 50 publications

References 56 publications

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

Enhanced Removal of Hydrophobic Short-Chain n-Alkanes from Gas Streams in Biotrickling Filters in Presence of Surfactant

A state of the art review on the use of fungi in biofiltration to remove volatile hydrophobic pollutants

Effects of Water Content and Irrigation of Packing Materials on the Performance of Biofilters and Biotrickling Filters: A Review

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