Fungal treatment of lignites with higher ash and sulphur contents using drum type reactor

Şener, Büşra; Aksoy, Derya; Çelik, Pınar Aytar; Toptaş, Yağmur; Koca, Sabiha; Koca, Hüseyin; Çabuk, Ahmet

doi:10.1016/j.hydromet.2018.10.017

Cited by 17 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The major weight loss between 300 and 600°C in Stage 2 might have been due to the release of carbon dioxide and other volatile matters from the coal matrix. Similar findings have also been reported that weight loss at 400–500°C is due to loss of volatiles and structural moisture associated with the mineral matter of coal 25–27 . Another weight loss between 600 and 800°C in Stage 3 could be due to the thermal decomposition of carbonates 28 .…”

Section: Resultssupporting

confidence: 85%

“…Similar findings have also been reported that weight loss at 400-500 C is due to loss of volatiles and structural moisture associated with the mineral matter of coal. [25][26][27] Another weight loss between 600 and 800 C in Stage 3 could be due to the thermal decomposition of carbonates. 28 In order to investigate the combustion characteristic of coal samples at various stages, the peak reaction rate temperature (T max1 , T max2 , and T max3 ), the maximum reaction rate (DTG max1 , DTG max2 , and DTG max3…”

Section: Xps Analysismentioning

confidence: 99%

See 1 more Smart Citation

An effective method to remove organic sulfur in coal: Effects on the physicochemical properties and combustion kinetics

Liu

et al. 2021

Environ Prog Sustainable Energy

View full text Add to dashboard Cite

The present work investigated an effective method to remove organic sulfur in coal utilizing different microorganisms (Nocardia mangyaensis and Pseudomonas putida).The most obvious finding to emerge from the sulfur forms analysis is that the organic sulfur removal of these two bacterial strains on Yunnan bumuga high-sulfur coal were 61.58% and 54.19%, respectively. This result may be confirmed by the Fourier transform infrared spectroscopy (FTIR) analyses that there were obvious decreases of intensity after biotreatment in the C S bond. Besides, the results of X-ray diffraction and X-ray photoelectron spectroscopy showed that major mineralogical phases in the forms of kaolinite and pyrite exist in raw coal. And more than 80% of thiophene and sulfoxide in the raw coal were removed by N. mangyaensis and P. putida. In addition, the results of the thermogravimetric analysis indicated that the combustion performance of biotreated coal samples was better than that of raw coal, and the most probable models to describe the combustion kinetics for biotreated coal and raw coal at different stages were obtained by the Arrhenius method and Coats-Redfern method.

show abstract

Section: Resultssupporting

confidence: 85%

Section: Xps Analysismentioning

confidence: 99%

An effective method to remove organic sulfur in coal: Effects on the physicochemical properties and combustion kinetics

Liu

et al. 2021

Environ Prog Sustainable Energy

View full text Add to dashboard Cite

show abstract

“…They might also facilitate methanogenesis. Alternaria could provide a more favorable environment for methanogens by reducing sulfur and ash from coal , and supply substrates for methanogens by converting CO 2 to formate via expression of formate dehydrogenase. , Aspergillus was used to pretreat polysaccharide wastes resulting in the production of acetate and butyrate as well as the promotion of H 2 generation …”

Section: Resultsmentioning

confidence: 99%

High Potential of Methane Production from Coal by Fungi and Hydrogenotrophic Methanogens from Produced Water

et al. 2020

View full text Add to dashboard Cite

Studying in situ microorganisms is essential to understand the formation of biogenic coalbed methane (CBM). Only a few studies have investigated the fungi community inhabiting in coal seams although fungi are found to degrade refractory compounds and solubilize coal and even work with methanogens to produce methane. In this study, produced water was collected from Qinshui Basin and used as the source of microflora to degrade coal. The function of fungi was analyzed by inhibition of bacteria with antibiotics. The results have shown that the inhibition of bacteria in the microcosms significantly increased the methane yield. Fungi were more favorable to cooperate with hydrogenotrophic methanogens when bacteria were inhibited as Methanobacterium were the predominant archaea accounting for 45.98–86.98% of the sequence reads. The relatively unchanged fungal community and high volatile fatty acids (VFAs) yields (48.70–85.72%) in the presence of antibiotics might contribute to H2 production to facilitate hydrogenotrophic methanogenesis. On the contrary, the dominant methanogens in microcosms without antibiotics gradually changed from Methanobacterium (89.85%) to Methanoceta (46.19%) and finally to Methanobacterium (87.72%). The bacterial community and organic intermediates have also changed greatly over time, which can be the reason for the succession of the methanogens. These results suggest that fungi in produced water can play an important role in coal biodegradation to produce VFAs and H2 that support hydrogenotrophic methanogenesis, which could be negatively impacted by the existence of bacteria.

show abstract

“…Low-rank coal is a low metamorphic degree coal with a lignin structure [1], which is abundant in the world [2,3]. Unfortunately, due to the high ash and volatile content of low-rank coal, the pollution caused by its direct combustion is serious [4][5][6][7]. Traditional low-rank coal treatment methods, such as gasi cation and pyrolysis, have the disadvantages of harsh process conditions and high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Action modes of surfactants on biodegradation of Wudong low-rank coal by Pseudomonas aeruginosa

Liu

Shi

et al. 2022

Preprint

View full text Add to dashboard Cite

Adding surfactants is an effective method to improve the biodegradation rate of coal. In this study, the action modes of nonionic Triton X-100, anionic surfactant SDS and cationic surfactant DTAB on the biodegradation of Xinjiang Wudong low-rank coal by Pseudomonas aeruginosa were investigated. By measuring cell membrane permeability and cell surface hydrophobicity of Pseudomonas aeruginosa, it was found that the permeability of cell membrane was enhanced under the action of Triton X-100, and reached the highest at 4 CMC, while SDS and DTAB inhibited the permeability of cell membrane. Cell surface hydrophobicity increased under the influence of Triton X-100, SDS and DTAB and reached a maximum at CMC. According to the effects of surfactants on the degradation rates of coal, it was shown that the improvement of cell membrane permeability could promote the degradation of coal, but the increase of cell surface hydrophobicity could inhibit the degradation of coal. When Triton X-100, SDS and DTAB were all at their optimal concentrations for the growths of Pseudomonas aeruginosa, the coal biodegradation rates reached 78.63 %, 55.93 % and 20.93 %, respectively. The adsorption experiment of bacteria on the coal surface and the low-temperature nitrogen adsorption experiment of coal presented that the improvement of permeability of cell membrane was the main factor for Triton X-100 to improve the coal degradation rate, even if it can slightly increase cell surface hydrophobicity. For SDS and DTAB, the decrease of cell membrane permeability and the increase of cell surface hydrophobicity are all not conducive to the biodegradation of coal.

show abstract

Fungal treatment of lignites with higher ash and sulphur contents using drum type reactor

Cited by 17 publications

References 26 publications

An effective method to remove organic sulfur in coal: Effects on the physicochemical properties and combustion kinetics

An effective method to remove organic sulfur in coal: Effects on the physicochemical properties and combustion kinetics

High Potential of Methane Production from Coal by Fungi and Hydrogenotrophic Methanogens from Produced Water

Action modes of surfactants on biodegradation of Wudong low-rank coal by Pseudomonas aeruginosa

Contact Info

Product

Resources

About