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Beaudin, N.; Caron, R.F.; Legros, Robert; Ramsay, J. O.; Ramsay, Bruce A.

doi:10.1023/a:1008365832031

Cited by 36 publications

(7 citation statements)

References 9 publications

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“…The C: N ratio reduction in present study was 60%, which corresponds to values reported by Lopez-Real and Baptista (1996), Michel et al, 1995;1996) and Alkoaik and Ghaly (2006a). Beaudin et al (1999) observed a 68% (49:1-17:1) reduction of C: N ratio and reported that the apparent degradation of soilderived mineral oil and grease increased substantially as the C: N ratio was reduced. Similar results have been obtained in landfarming where a C: N ratio of 18 (lowest ratio tested) resulted in maximum oil decomposition (Rasiah et al, 1991).…”

Section: C:n Ratiosupporting

confidence: 90%

“…They observed relatively stable CO 2 after the thirteen month and fluctuating between 2300 and 2000 µg/dwt/day for the remainder of bioremediation period. Beaudin et al (1999) reported that about 6.8 moL of CO 2 kg −1 of initial dry compost was produced during 30 days of weathered hydrocarbon contaminated soil composting when the plateau temperature was in the range of 23-50°C, but declined sharply to 3.2 moL of CO 2 kg −1 of initial dry compost when the plateau was kept at 60°C. The model provided good a fit (R 2 = 0.999) to the experimental data as shown in Fig.…”

Section: C:n Ratiomentioning

confidence: 99%

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Sequential Remediation Processes for Effective Removal of Oil from Contaminated Soils

Dave¹

2011

American Journal of Environmental Sciences

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Section: C:n Ratiosupporting

confidence: 90%

Section: C:n Ratiomentioning

confidence: 99%

Sequential Remediation Processes for Effective Removal of Oil from Contaminated Soils

Dave¹

2011

American Journal of Environmental Sciences

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“…Compost material, which is mainly based on plant derived litter material, contains high numbers of microbes that are capable to degrade hydrocarbons (Keeling et al, 1994). Therefore, in the past it has been investigated in several studies, if the addition of compost material may stimulate the degradation of pollutants like hydrocarbons in Technosols (e.g., Beaudin et al, 1999; Van Gestel et al, 2003). However, despite the often reported positive effects of compost amendments on the degradation of hydrocarbons in Technosols, it is not clear if these positive effects of compost addition are related to the introduced microbes and their genetic potential to degrade alkanes or to a general shift of microbial community structure in soil as a result of extra nutrients provided by the compost.…”

Section: Introductionmentioning

confidence: 99%

Effects of different compost amendments on the abundance and composition of alkB harboring bacterial communities in a soil under industrial use contaminated with hydrocarbons

et al. 2014

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Alkane degrading microorganisms play an important role for the bioremediation of petrogenic contaminated environments. In this study, we investigated the effects of compost addition on the abundance and diversity of bacteria harboring the alkane monooxygenase gene (alkB) in an oil-contaminated soil originated from an industrial zone in Celje, Slovenia (Technosol). Soil without any amendments (control soil) and soil amended with two composts differing in their maturation stage and nutrient availability, were incubated under controlled conditions in a microcosm experiment and sampled after 0, 6, 12, and 36 weeks of incubation. As expected the addition of compost stimulated the degradation of alkanes in the investigated soil shortly after the addition. By using quantitative real-time PCR higher number of alkB genes were detected in soil samples amended with compost compared to the control soils. To get an insight into the composition of alkB harboring microbial communities, we performed next generation sequencing of amplicons of alkB gene fragment. Richness and diversity of alkB gene harboring prokaryotes was higher in soil mixed with compost compared to control soils with stronger effects of the less maturated, nutrient poor compost. The phylogenetic analysis of communities suggested that the addition of compost stimulated the abundance of alkB harboring Actinobacteria during the experiment independent from the maturation stage of the compost. AlkB harboring γ-proteobacteria like Shewanella or Hydrocarboniphaga as well as α-proteobacteria of the genus Agrobacterium responded also positively to the addition of compost to soil. The amendment of the less maturated, nutrient poor compost resulted in addition in a large increase of alkB harboring bacteria of the Cytophaga group (Microscilla) mainly at the early sampling time points. Our data indicates that compost amendments significantly change abundance and diversity pattern of alkB harboring microbes in Technosol and might be a useful agent to stimulate bioremediation of hydrocarbons in contaminated soils.

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“…Beaudin et al (1996) showed that composting resulted in degradation of 77% of the mineral oil and grease (MOG) of a petroleum-hydrocarbon contaminated soil in six months while landfarming degraded less than 30% of the MOG in the same period. Studies were also performed by composting hydrocarbon-contaminated soil with other materials as biowaste (Van Gestel et al 2003), activated sludge (Juteau et al 2003) and tree leaves (Beaudin et al 1999). A similar number of researches examined the composting of raw ORS with pig slurry (Marin et al 2006); peat (Bengtsson et al 1998) and horse manure (Kirchmann and Ewnetu 1998).…”

Section: Introductionmentioning

confidence: 99%

Oil refinery sludge and green waste simulated windrow composting

et al. 2008

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Oil refinery sludge (ORS) was mixed with shredded green wastes (GW) at ratios of 1:1 v/v (RI) and 1:3 v/v (RII). The mixtures, of approximately volumes of 1,020 l and 990 l respectively, were introduced in metal cubic containers of 1.0 m(3) volume, opened at the top and with small holes punctured in the bottom and the side. The containers were additionally insulated with a layer of rockwool (20 mm). The boxes were emptied, the mixtures were turned and water was added occasionally, in one to two weeks intervals, simulating a windrow composting system. Temperature, physiochemical characteristics, mineral oil and grease (MOG) concentration, polycyclic aromatic hydrocarbons (PAHs) concentration, carbon dioxide emission, methane emission and microorganisms presence were recorded either daily or every time the mixtures were turned, for a period of 120 days. RII recorded temperatures as high as 62 degrees C, reaching 56 degrees C in Day 6 and retained temperatures above 50 degrees C for more than 40 days. RI recorded its highest temperature of 53 degrees C in Day 77. The reason why the two mixtures behaved so differently can be explained by: (i) extended co-digestion phenomena by the microorganisms decomposing the GW in RII, (ii) toxic effect of ORS in RI due to the far larger amounts used (840 kg in RI in comparison with the 460 kg in RII). After Day 36 temperature increased gradually in RI and MOG and PAHs reduction was first noted. At the end of the experiment MOG concentration in RI was 57.2 mg/kg dry weight (dw) (52.1% reduction) where in RII was 34.3 mg/kg dw (62.1% reduction). Emissions of methane and carbon dioxide support the concept of the toxic effect and the delay ignition of the decomposing process in RI. In total, CO(2) and CH(4) emissions from RI were recorded to be 30.8 kg and 18.5 g, respectively, where from RII 59.6 kg of CO(2) and 6.4 g of CH(4) were emitted. An effort was made to determine the effect of temperature alone (as an abiotic treating parameter) in both mixtures. It can be supported that about least 15% of the MOG and PAHs removal.

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Untitled

Cited by 36 publications

References 9 publications

Sequential Remediation Processes for Effective Removal of Oil from Contaminated Soils

Sequential Remediation Processes for Effective Removal of Oil from Contaminated Soils

Effects of different compost amendments on the abundance and composition of alkB harboring bacterial communities in a soil under industrial use contaminated with hydrocarbons

Oil refinery sludge and green waste simulated windrow composting

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