Bioassay of chemically treated subbituminous coal derivatives using Pseudomonas putida F1

Huang, Zaixing; Urynowicz, Michael A.; Colberg, Patricia J.S.

doi:10.1016/j.coal.2013.01.012

Cited by 39 publications

(23 citation statements)

References 64 publications

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“…Research on microbial-enhanced coalbed methane (MECoM) production has been conducted in four general directions: 1) microbial stimulation involving in-situ nutrient amendment; 2) bioaugmentation through injection of enrichment culture; 3) increasing coal accessibility via physical fracturing; and 4) enhancement of bioavailability by biotic or abiotic pretreatments (Ritter et al, 2015). A substantial body of work has demonstrated the feasibility of the above methods (Fallgren et al, 2013a;Fallgren et al, 2013b;Furmann et al, 2013b;Green et al, 2008;Hang et al, 2017;Harris et al, 2008;Huang et al, 2013;Jones et al, 2010;Jones et al, 2008;Papendick et al, 2011;Ritter et al, 2015;Susilawati et al, 2013). Nevertheless, the field of MECoM research is still in the stage of exploration and a better fundamental understanding is necessary to assess the maximum methanogenic potential and possible improvements on the tiny conversion of coal to methane (normally below 1%.…”

Section: The Emerging Concept Of Microbially Enhanced Coalbed Methanementioning

confidence: 99%

Characterisation of bioavailability of Surat Basin Walloon coals for biogenic methane production using environmental microbial consortia

Chen

Zheng

Hamilton

et al. 2017

International Journal of Coal Geology

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The study sets out to characterize the bioavailability of six Surat Basin Walloon coals from different stratigraphic layers in a single borehole to environmental methanogenic consortia. Factors that control bioavailability have also been investigated on grounds of coal petrographic composition and the organic composition of solvent-extractable matter. Finely crushed coal core samples were inoculated with digested sludge culture from domestic wastewater treatment in serum bottles kept anoxically before incubation at mesophilic temperature over 30 days for biomethane production. Degradation of coal compounds was demonstrated via GC-MS characterization of methanol and dichloromethane (DCM) extracts, in combination with aqueous volatile fatty acids and alcohols and TOC (total organic carbon) analysis on fresh and microbially-digested coal samples. The resulting methane yields ranged from 14 to 33 μmol/g, with an average of 21 μmol/g (0.515 m 3 /tonne), comparable to those previously reported for subbituminous coals. Organic solvent-extractable materials that accounted for 3.8 to 12% of coal weight were generally dominated by aliphatic compounds, composed of mainly medium-long-chain n-alkanes, n-alcohols and esters. Aromatics were detected up to three fused rings, and are rich in dibenzofuran, alkyl benzene, diphenyls and alkyl PAH (polymeric aromatic hydrocarbon). The abundance of solvent-extractable matter was found to be positively associated with liptinite content, particularly suberinite, sporinite and liptodetrinite. Preservation of these compounds was thought to rely on vitrinite, such as telinite and collotelinite that are rich in micropores, serving as storage for the hydrocarbons. Environmental factors, such as microbe-carrying groundwater might compromise coal extractability by converting coal hydrocarbons to biogas. Bioavailability of coal was shown to be controlled by three factors: 1) Water solubility-Bioassay eliminated an average 98% of aqueous compounds (based on TOC), which were dominated by volatile fatty acids and alcohols, and to a lesser degree, medium-chain (primarily C 10 to C 20) n-alcohols, esters and aliphatic amine; 2) Solvent extractability-34.5% of solvent-extractable compounds were shown to be biodegraded (based on peak intensity in GC-MS), with methanol extracts being more bioavailable than DCM's; 3) Heterogeneous moieties, particularly aliphatic hydroxyl group, ester bond, ether bond and C-N bond in aliphatic amine-These functional groups present heteroatoms that can lower the activation energy of nearby bonds, making them vulnerable for microbial cleavage. Compound degradation in bioassays was shown to be clearly associated with methane yield, but only a small proportion degraded was converted to methane. Further improvement may be achieved via proper adaptation of the current microbial community.

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Section: The Emerging Concept Of Microbially Enhanced Coalbed Methanementioning

confidence: 99%

Characterisation of bioavailability of Surat Basin Walloon coals for biogenic methane production using environmental microbial consortia

Chen

Zheng

Hamilton

et al. 2017

International Journal of Coal Geology

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“…This TOC content was from pretreatment that was conducted with nitric acid at 3.33 mol/L for 4 months (Huang et al, 2013b). Although results obtained from different studies may not be comparable owing to different mechanisms, the optimal value determined in this study for the critical parameters did lead to more efficient coal depolymerization and dissolution compared with those reported so far.…”

Section: Characterization Of the Soluble Compoundsmentioning

confidence: 70%

“…Throughout the years, different chemicals, such as strong acids, strong bases and oxidants have been investigated regarding their effects on solubilizing coal (Alvarez et al, 2003;Hayatsu et al, 1981;Huang et al, 2013b). For subbituminous coal sampled from the Powder River Basin (PRB), nitric acid at 3.33 mol/L was found to depolymerize the coal the best compared to sodium hydroxide, hydrogen peroxide and permanganate (Huang et al, 2013b). However, the compounds in the water soluble phases derived from nitric acid and sodium hydroxide treatments were shown to be relatively recalcitrant.…”

Section: Introductionmentioning

confidence: 99%

Coal depolymerization using permanganate under optimal conditions

Xia

Wiltowski

Harpalani

et al. 2016

International Journal of Coal Geology

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For the purpose of solubilizing coal for liberating valuable chemicals, permanganate was used as an oxidant. To obtain the highest yield of soluble compounds from coal, permanganate was studied at different concentrations and different temperatures with different loading of bituminous coal from the Illinois basin. The optimal condition for dissolving 60% of the bituminous coal was: KMnO 4 at 0.45 mol/L; temperature at 25 o C; coal loading at 50 g/L in a

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“…Chemical pretreatment is widely studied in the biotransformation of coal. The reported chemical reagents include potassium permanganate (KMnO 4 ) [14], hydrogen peroxide (H 2 O 2 ) [15][16][17], nitric acid (HNO 3 ) [18,19], sodium hydroxide (NaOH) [20,21], and so on. These reagents are proven to enhance methane production by increasing the solubility of organic carbon in coal, especially subbituminous coal and lignite.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, NaOH pretreatment has been reported to increase the solubility of coal. Huang et al treated subbitumious with NaOH, and found the enhancement of solubility of organic carbon and the releasement of aromatic fragments with low molecular weight [20,21]. Most reported chemical pretreatments including NaOH pretreatment were performed on low-rank coal or bituminous coal, while anthracite has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

The effect of NaOH pretreatment on coal structure and biomethane production

Guo

Zhang

et al. 2020

PLoS ONE

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Biogenic CBM is an important component of detected CBM, which is formed by coal biodegradation and can be regenerated by anaerobic microorganisms. One of the rate-limiting factors for microbial degradation is the bioavailability of coal molecules, especially for anthracite which is more condense and has higher aromaticity compared with low-rank coal. In this paper, NaOH solution with different concentrations and treating time was employed to pretreat anthracite from Qinshui Basin to alter the coal structure and facilitate the biodegradation. The results showed that the optimal pretreatment conditions were 1.5 M NaOH treating for 12 h, under which the biomethane production was increased by 17.65% compared with untreated coal. The results of FTIR and XRD showed that NaOH pretreatment mainly reduced the multi-substituted aromatics, increased the CO in alcohols and aromatic ethers and the branching degree of aliphatic chain, and decreased the aromatic ring structure, resulting in the improvement of coal bioavailability and enhancement of biomethane yield. And some organics with potential to generate methane were released to filtrate as revealed by GC-MS. Our results suggested that NaOH was an effective solution for pretreating coal to enhance biogenic methane production, and anthracite after treating with NaOH could be the better substrate for methanogenesis.

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Bioassay of chemically treated subbituminous coal derivatives using Pseudomonas putida F1

Cited by 39 publications

References 64 publications

Characterisation of bioavailability of Surat Basin Walloon coals for biogenic methane production using environmental microbial consortia

Characterisation of bioavailability of Surat Basin Walloon coals for biogenic methane production using environmental microbial consortia

Coal depolymerization using permanganate under optimal conditions

The effect of NaOH pretreatment on coal structure and biomethane production

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