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Wang Y, Dong L, Lu Y, Ma L, Gong G, Wang Y. Effect of Benzyl Alcohol on Biomethanation from Lignite. ACS OMEGA 2022; 7:43965-43972. [PMID: 36506159 PMCID: PMC9730774 DOI: 10.1021/acsomega.2c05282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/26/2022] [Indexed: 06/17/2023]
Abstract
Currently, biomethane obtained from coal resources, such as lignite and peat, serves as a sustainable biofuel urgently needed by the energy economy. To improve biomethane yield from lignite, the effects of different concentrations of benzyl alcohol, a degraded product of humic acid, on a biomethanation fermentation system were analyzed. The total biomethane yield, daily biomethane yield, coenzyme F420, VFA (volatile fatty acids) concentration, alkalinity, and pH were used to determine the optimal benzyl alcohol concentration. The biomethanation fermentation system with 2000 mg/L benzyl alcohol produced up to 4.03 mL/g of biomethane, which was 1.15 times that produced from the control group. The coenzyme F420, VFA, alkalinity, and pH of the system after adding 2000 mg/L benzyl alcohol were more preferable after adding other concentrations during the lignite biomethanation process. In summary, 2000 mg/L benzyl alcohol had a significantly positive effect on the lignite biomethanation fermentation system. When benzyl alcohol is added to the fermentation system, it accelerates the tricarboxylic acid cycle, which in turn produces more biomethane. Additionally, the self-supply of lignite microbial transformation nutrients from the perspective of chemical composition was explored as a novel approach in solving the common problem of low biomethane yield from a single lignite raw material. This also laid a foundation for subsequent steps through the adjustment of pretreatment conditions to ensure that the lignite pretreatment liquid contained increased benzyl alcohol, and a greater yield of biomethane can be produced after activated sludge addition.
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Affiliation(s)
- Ying Wang
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
| | - Lichao Dong
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
| | - Yanan Lu
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
| | - Litong Ma
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
- Inner
Mongolia Engineering Research Center of Comprehensive Utilization
of Bio-coal Chemical Industry, Baotou 014010, Inner Mongolia Autonomous
Region, P. R. China
- Laboratory
of Low Rank Coal Carbon Neutralization, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
| | - Guanqun Gong
- School
of Chemical Engineer & Technology, China
University of Mining and Technology, Xuzhou 221116, Jiangsu
Province, P. R. China
| | - Yaxiong Wang
- School
of Chemistry and Chemical Engineering, Inner
Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
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Menezes O, Melo N, Paraiso M, Freitas D, Florêncio L, Kato MT, Gavazza S. The key role of oxygen in the bioremoval of 2,4-diaminoanisole (DAAN), the biotransformation product of the insensitive munitions compound 2,4-dinitroanisole (DNAN), over other electron acceptors. CHEMOSPHERE 2021; 267:128862. [PMID: 33183786 DOI: 10.1016/j.chemosphere.2020.128862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/19/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
Insensitive munitions compounds, such as 2,4-dinitroanisole (DNAN), are replacing conventional explosives. DNAN is anaerobically reduced to 2,4-diaminoanisole (DAAN), a toxic aromatic amine. However, the removal of DAAN under different redox conditions is yet to be elucidated. Herein, we analyzed DAAN consumption in biotic and abiotic microcosms when exposed to different redox conditions (without added electron acceptor, without added electron acceptor but with pyruvate as a co-substrate, with sulfate, with nitrate, and with oxygen), using an anaerobic sludge as inoculum. We observed that DAAN autoxidation, an abiotic reaction, was significant in microaerobic environments. DAAN also reacted abiotically with heat-killed sludge up to a saturation limit of 67.4 μmol DAAN (g VSS heat-killed sludge)-1. Oxygen caused the fastest removal of DAAN in live sludge among the conditions tested. Treatments without added electron acceptors (with or without pyruvate) presented similar DAAN removal performances, although slower than the treatment with oxygen. Sulfate did not exhibit any effect on DAAN removal compared to the treatment without added electron acceptors. Nitrate, however, inhibited the process. An enrichment culture from the microcosms exposed to oxygen could be developed using DAAN as the sole substrate in microaerobic conditions. The enrichment profoundly changed the microbial community. Unclassified microorganisms accounted for 85% of the relative abundance in the enrichment culture, suggesting that DAAN microaerobic removal might have involved organisms that were not yet described. Our results suggest that DAAN microaerobic treatment can be coupled to DNAN anaerobic reduction in sludge, improving the treatment of DNAN-containing wastewaters.
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Affiliation(s)
- Osmar Menezes
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil.
| | - Natanna Melo
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil
| | - Matheus Paraiso
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil
| | - Danúbia Freitas
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil
| | - Lourdinha Florêncio
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil
| | - Mario T Kato
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil
| | - Savia Gavazza
- Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Recife, PE, 50740-530, Brazil.
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Pereira L, Mondal PK, Alves M. Aromatic Amines Sources, Environmental Impact and Remediation. POLLUTANTS IN BUILDINGS, WATER AND LIVING ORGANISMS 2015. [DOI: 10.1007/978-3-319-19276-5_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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