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The operating performance of a biotrickling filter with Lysinibacillus fusiformis for the removal of high-loading gaseous chlorobenzene.

Li ZX, Yang BR, Jin JX, Pu YC, Ding C - Biotechnol. Lett. (2014)

Bottom Line: Removal of gaseous chlorobenzene (CB) by a biotrickling filter (BTF) filled with modified ceramics and multi-surface hollow balls during gas-liquid mass transfer at the steady state was by microbial degradation rather than dissolution in the spray liquid or emission into the atmosphere.The BTF, loaded with Lysinibacillus fusiformis, performed well for purification of high-loading CB gas.The maximum CB gas inlet loading rate, 103 g m(-3) h(-1), CB elimination capacity, 97 g m(-3) h(-1), and CB removal efficiency, 97.7 %, were reached at a spray liquid flow rate of 27.6 ml min(-1), an initial CB concentration of up to 1,300 mg m(-3), and an empty bed retention time of more than 45 s.

View Article: PubMed Central - PubMed

Affiliation: School of Chemical and Biological Engineering, Yancheng Institute of Technology, YanCheng, 224051, People's Republic of China.

ABSTRACT
Removal of gaseous chlorobenzene (CB) by a biotrickling filter (BTF) filled with modified ceramics and multi-surface hollow balls during gas-liquid mass transfer at the steady state was by microbial degradation rather than dissolution in the spray liquid or emission into the atmosphere. The BTF was flexible and resistant to the acid environment of the spray liquid, with the caveat that the spray liquid should be replaced once every 6-7 days. The BTF, loaded with Lysinibacillus fusiformis, performed well for purification of high-loading CB gas. The maximum CB gas inlet loading rate, 103 g m(-3) h(-1), CB elimination capacity, 97 g m(-3) h(-1), and CB removal efficiency, 97.7 %, were reached at a spray liquid flow rate of 27.6 ml min(-1), an initial CB concentration of up to 1,300 mg m(-3), and an empty bed retention time of more than 45 s.

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Amount of chlorobenzene in the spray liquid and the BTF within a cycle period
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Fig3: Amount of chlorobenzene in the spray liquid and the BTF within a cycle period

Mentions: It is possible that a small amount of CB could be removed from the BTF by the spray liquid when the liquid is replaced. To determine this, the CB concentration in the spray liquid was continuously monitored within a cycle period, at the same time points when the pH and intermediate products in the BTF were determined. The results showed that the amount of CB in the spray liquid averaged 78 mg with only minor fluctuations after being in operation for 2 days (Fig. 3). This was well below the average cumulative reduction of CB, which was 40.4 g in the BTF in a single cycle. This illustrates that there were small levels of soluble and accumulated CB in the spray liquid. Cout, shown in Supplementary Fig. 1a, indicated that the average CB loss from the gas outlet to the atmosphere was 3.2 g. Thus, the removal of CB was mostly due to the biological function of the dominant CB-degradation strain. Microstructures of the packing materials with biofilms formed by the dominant CB-degradation strain (Supplementary Fig. 2) and the CB levels (Supplementary Fig. 1) also demonstrated that the BTF system was at a steady operational state.Fig. 3


The operating performance of a biotrickling filter with Lysinibacillus fusiformis for the removal of high-loading gaseous chlorobenzene.

Li ZX, Yang BR, Jin JX, Pu YC, Ding C - Biotechnol. Lett. (2014)

Amount of chlorobenzene in the spray liquid and the BTF within a cycle period
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4150996&req=5

Fig3: Amount of chlorobenzene in the spray liquid and the BTF within a cycle period
Mentions: It is possible that a small amount of CB could be removed from the BTF by the spray liquid when the liquid is replaced. To determine this, the CB concentration in the spray liquid was continuously monitored within a cycle period, at the same time points when the pH and intermediate products in the BTF were determined. The results showed that the amount of CB in the spray liquid averaged 78 mg with only minor fluctuations after being in operation for 2 days (Fig. 3). This was well below the average cumulative reduction of CB, which was 40.4 g in the BTF in a single cycle. This illustrates that there were small levels of soluble and accumulated CB in the spray liquid. Cout, shown in Supplementary Fig. 1a, indicated that the average CB loss from the gas outlet to the atmosphere was 3.2 g. Thus, the removal of CB was mostly due to the biological function of the dominant CB-degradation strain. Microstructures of the packing materials with biofilms formed by the dominant CB-degradation strain (Supplementary Fig. 2) and the CB levels (Supplementary Fig. 1) also demonstrated that the BTF system was at a steady operational state.Fig. 3

Bottom Line: Removal of gaseous chlorobenzene (CB) by a biotrickling filter (BTF) filled with modified ceramics and multi-surface hollow balls during gas-liquid mass transfer at the steady state was by microbial degradation rather than dissolution in the spray liquid or emission into the atmosphere.The BTF, loaded with Lysinibacillus fusiformis, performed well for purification of high-loading CB gas.The maximum CB gas inlet loading rate, 103 g m(-3) h(-1), CB elimination capacity, 97 g m(-3) h(-1), and CB removal efficiency, 97.7 %, were reached at a spray liquid flow rate of 27.6 ml min(-1), an initial CB concentration of up to 1,300 mg m(-3), and an empty bed retention time of more than 45 s.

View Article: PubMed Central - PubMed

Affiliation: School of Chemical and Biological Engineering, Yancheng Institute of Technology, YanCheng, 224051, People's Republic of China.

ABSTRACT
Removal of gaseous chlorobenzene (CB) by a biotrickling filter (BTF) filled with modified ceramics and multi-surface hollow balls during gas-liquid mass transfer at the steady state was by microbial degradation rather than dissolution in the spray liquid or emission into the atmosphere. The BTF was flexible and resistant to the acid environment of the spray liquid, with the caveat that the spray liquid should be replaced once every 6-7 days. The BTF, loaded with Lysinibacillus fusiformis, performed well for purification of high-loading CB gas. The maximum CB gas inlet loading rate, 103 g m(-3) h(-1), CB elimination capacity, 97 g m(-3) h(-1), and CB removal efficiency, 97.7 %, were reached at a spray liquid flow rate of 27.6 ml min(-1), an initial CB concentration of up to 1,300 mg m(-3), and an empty bed retention time of more than 45 s.

Show MeSH
Related in: MedlinePlus