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Ms. Jeong Yoon Ahn
Kyonggi University

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0 Catalysis
0 Catalyst
0 CCU
0 environment and development
0 CO2 methanation

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Short Biography

College of Creative Engineering, Department of Environmental Energy Engineering, Kyonggi University

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Journal article
Published: 26 August 2021 in Sustainability
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The production of volatile fatty acids (VFAs) from waste stream has been recently getting attention as a cost-effective and environmentally friendly approach in mechanical–biological treatment plants. This is the first study to explore the use of a functional bacterium, AM5 isolated from forest soil, which is capable of enhancing the production of VFAs in the presence of soil bacteria as a co-digester in non-strict anaerobic fermentation processes of food waste leachates. Batch laboratory-scale trials were conducted under thermophilic conditions at 55 °C and different pH values ranging from approximately 5 to 11, as well as under uncontrolled pH for 15 days. Total solid content (TS) and volatile solid content (VS) were observed with 58.42% and 65.17% removal, respectively. An effluent with a VFA concentration of up to 33,849 mg/L (2365.57 mg/g VS; 2244.45 mg/g chemical oxygen demand (COD)-VFA VS; 1249 mg/g VSremoved) was obtained at pH 10.5 on the second day of the batch culture. The pH resulted in a significant effect on VFA concentration and composition at various values. Additionally, all types of VFAs were produced under pH no-adjustment (approximately 5) and at pH 10.5. This research might lead to interesting questions and ideas for further studies on the complex metabolic pathways of microbial communities in the mixture of a soil solution and food waste leachate.

ACS Style

Van Hong Thi Pham; Jeongyoon Ahn; Jaisoo Kim; Sangbeom Lee; Ingyu Lee; Sungchul Kim; Soonwoong Chang; Woojin Chung. Volatile Fatty Acid Production from Food Waste Leachate Using Enriched Bacterial Culture and Soil Bacteria as Co-Digester. Sustainability 2021, 13, 9606 .

AMA Style

Van Hong Thi Pham, Jeongyoon Ahn, Jaisoo Kim, Sangbeom Lee, Ingyu Lee, Sungchul Kim, Soonwoong Chang, Woojin Chung. Volatile Fatty Acid Production from Food Waste Leachate Using Enriched Bacterial Culture and Soil Bacteria as Co-Digester. Sustainability. 2021; 13 (17):9606.

Chicago/Turabian Style

Van Hong Thi Pham; Jeongyoon Ahn; Jaisoo Kim; Sangbeom Lee; Ingyu Lee; Sungchul Kim; Soonwoong Chang; Woojin Chung. 2021. "Volatile Fatty Acid Production from Food Waste Leachate Using Enriched Bacterial Culture and Soil Bacteria as Co-Digester." Sustainability 13, no. 17: 9606.

Journal article
Published: 20 August 2021 in Catalysts
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In this study, a pilot-scale reactor was designed and compared using computational fluid dynamics (CFD) for a high-efficiency CO2 methanation reaction. The trends of the CO2 methanation catalyst efficiency at a pilot or industrial scale could be lower than those measured at the laboratory scale, owing to the flow of fluid characteristics. Therefore, the CO2 methanation reactor was designed based on the results of the CFD analysis to minimize the above phenomenon. Ni–Ce–Zr was used to manufacture a CO2 methanation catalyst in the form of pellets. The catalyst successfully produced about 43.3 Nm3/d of methane from the reactor. This result shows that CO2 methanation, which is known as an exothermic reaction, was stable at the pilot scale. It is believed that the self-supply of energy will be possible when this CO2 methanation technology is applied to industrial processes generating large amounts of CO2 and H2 from by-product gases.

ACS Style

Jeongyoon Ahn; Heysuk Kim; Yeonhee Ro; Jintae Kim; Woojin Chung; Soonwoong Chang. Development of Pilot-Scale CO2 Methanation Using Pellet-Type Catalysts for CO2 Recycling in Sewage Treatment Plants and Its Validation through Computational Fluid Dynamics (CFD) Modeling. Catalysts 2021, 11, 1005 .

AMA Style

Jeongyoon Ahn, Heysuk Kim, Yeonhee Ro, Jintae Kim, Woojin Chung, Soonwoong Chang. Development of Pilot-Scale CO2 Methanation Using Pellet-Type Catalysts for CO2 Recycling in Sewage Treatment Plants and Its Validation through Computational Fluid Dynamics (CFD) Modeling. Catalysts. 2021; 11 (8):1005.

Chicago/Turabian Style

Jeongyoon Ahn; Heysuk Kim; Yeonhee Ro; Jintae Kim; Woojin Chung; Soonwoong Chang. 2021. "Development of Pilot-Scale CO2 Methanation Using Pellet-Type Catalysts for CO2 Recycling in Sewage Treatment Plants and Its Validation through Computational Fluid Dynamics (CFD) Modeling." Catalysts 11, no. 8: 1005.

Journal article
Published: 31 January 2020 in Journal of Korea Society of Waste Management
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ACS Style

Jeong-Yoon Ahn; Seok-Joo Chung; Ji-Tae Kim. Study on CO2 Methanation of Various Catalyst Formation for Full-Scale Process Application. Journal of Korea Society of Waste Management 2020, 37, 1 -8.

AMA Style

Jeong-Yoon Ahn, Seok-Joo Chung, Ji-Tae Kim. Study on CO2 Methanation of Various Catalyst Formation for Full-Scale Process Application. Journal of Korea Society of Waste Management. 2020; 37 (1):1-8.

Chicago/Turabian Style

Jeong-Yoon Ahn; Seok-Joo Chung; Ji-Tae Kim. 2020. "Study on CO2 Methanation of Various Catalyst Formation for Full-Scale Process Application." Journal of Korea Society of Waste Management 37, no. 1: 1-8.