Biodegradation and Bioconversion of Volatile Pollutants

Kennes, Christian; Abubackar, Haris Nalakath; Veiga, María C.

doi:10.1002/9781118523360.ch2

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…As mentioned, by the end of the experiment, about 42% of the sulfur element in DMS was biologically converted to SO 4 2− ; this is relatively high. However, the subsequent reduction of S 0 to S 2− (under anaerobic conditions) and SO 4 2− (under aerobic conditions) after DMS demethylation can be the reason for the relatively high SO 4 2− concentrations . These results strongly suggest that DMS gas can be stabilized by biomass assimilation under anoxic conditions.…”

Section: Resultsmentioning

confidence: 92%

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Abatement of dimethyl sulfide using anoxic biotrickling filter

Shihab

Akmirza

Mhemid

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: This study aimed to use a lab-scale anoxic biotrickling filter (ABTF) for the bioconversion of dimethyl sulfide (DMS) gas to produce less harmful byproducts, i.e. elemental sulfur and/or sulfate. It examined the exploitation of nitrate as an electron acceptor in the oxidation of malodorous DMS-containing gas in combination with other parameters: gas/liquid (G/L) ratio (40, 60, 80, 100, 150), empty bed residence time (EBRT) (10, 30, 60, 90, 120 s) and inlet loading (IL) (9, 18, 48, 90 g m −3 h −1 ). RESULTS: Thermodynamic analysis and half-reactions showed that at DMS/NO3 − molar yield ratios 0.75 and 0.34, elemental sulfur and sulfate were the main metabolic products respectively. Overall, 58% of the sulfur element in DMS was bioconverted to elemental sulfur. Mass balance calculations revealed high denitrification efficiency, i.e. 52.7% of inlet NO 3 − was converted to N 2 . The optimal EBRT was found as 30 s (corresponding to removal efficiency (RE) 89%) for inlet concentration 150 mg m −3 and as 60 s (corresponding to RE 78%) for inlet concentration 1500 mg m −3 . However, the maximum elimination capacity (EC) was 70.3 g m −3 h −1 at EBRT 60 s and G/L ratio 80. The relative abundance of bacterial communities was dominated by Proteobacteria (56.1%) and Alphaproteobacteria (27.3%) at phylum and class levels respectively. CONCLUSION: The study revealed that ABTF has a reliable biodegradation capacity in DMS oxidation under anoxic conditions; however, process improvement on mass transfer enhancement for low waste gas concentrations is still required. /jctb ∑ ΔG reactants = +25.4 kJ e-mol −1Similarly, Y G/X = 1158 kJ C-mol −1 , D = 6.66 and X = 28/5 = 5.6.Y X∕D = 0.34 × (e-mol biomass∕1 C − mol biomass)

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Section: Resultsmentioning

confidence: 92%

“…Mass transfer and biodegradation limitations are considered the core of the gas phase removal mechanism, and this differs entirely from the wastewater treatment process. However, the aerobic and anaerobic degradation routes of DMS have been fully illustrated by Kennes et al and Wei et al…”

Section: Resultsmentioning

confidence: 99%