Experimental study on CO_2 dry biomethanation
Journal Title: Energy Environmental Protection - Year 2024, Vol 38, Issue 3
Abstract
As China has gradually become the largest energy consumer and carbon emitter, the efficient utilization of CO_2 has become an important means in realizing the "dual carbon" strategy. Microbial catalytic reduction of CO_2 offers a low-cost solution for simultaneous green hydrogen storage and CO_2 conversion and utilization. This paper focuses on the establishment of CO_2 dry biomethanization method, and conducts experiments to identify the key factors affecting the conversion rate and microbial community structure. The results showed that maintaining a temperature of 35 ℃, employing an optimal H_2/CO_2 feed ratio of 4 ∶ 1, and implementing a 6-day soaking period for the nutrient solution in an anaerobic dry reactor filled with carbon sponge are critical for enhancing the conversion rate. Additionally, microbes at the end of the soaking cycle were sequenced and analyzed by high-throughput sequencing technology. The dry reactor exhibited dominance by anaerobic hydrogen-consuming methanogens, particularly at the genus level with Metanobacterium and Metaosaeta being prevalent. Moreover, the bacterial community displayed relatively high levels of Aconobacterium and Mesotoga. This study aims to investigate the key factors affecting the conversion rate of CO_2 dry anaerobic biomethanation and to analyze the structure of the microbial community, in order to provide a theoretical foundation and technical support for the process of microbial methane production.
Authors and Affiliations
XIE Xin|Shandong Benyuan Environmental Technology Co., Ltd., China, School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, WANG Chunhui|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, YU Rongzhen|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, XU Heng|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, ZHOU Hao|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, SUN Zhiming|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China, WANG Jianbing*|School of Chemistry and Environmental Engineering, China University of Mining and Technology (Beijing), China
Keywords
Related Articles
- EP ID EP737927
- DOI 10.20078/j.eep.20240209
- Views 41
- Downloads 0
Research progress on the production of multi-carbon products from CO_2 by integrating electrochemical and microbial conversion
Production of high value-added chemicals and fuels from carbon dioxide (CO_2) is an important technology to achieve zero carbon emissions. However, how to efficiently and sustainably convert carbon dioxide into higher va...
Progress in selective electrochemical reduction of nitrate into ammonia
Selective electrochemical reduction of nitrate (NO3-) into ammonia (NH_3) is critical for environmental remediation and resource recovery. This review comprehensively summarizes the recent advances in electrochemical con...
Advances in high-value utilization of fly ash from coal-fired power plants
Currently, China has a huge demand for energy, and coal-fired power generation plays a major role. Fly ash is the main by-product of coal-fired power plants, with an annual output of more than 600 million tons and a comp...
Study on optimization of nitrate-dependent anaerobic ferrous oxidation
Nitrate-dependent anaerobic ferrous oxidation (NAFO) is a newly discovered biological denitrification process that can effectively remove nitrate from wastewater lacking organic carbon source and has a good development p...
Effects of intermittent power-on and electrode inversion on anaerobic co-digestion of sludge and food waste in MEC-CSTR system
The rapid urbanization has led to the discharge and generation of large amounts of organic solid waste, such as sewage sludge (SS) and food waste (FW). The introduction of a microbial electrolysis cell (MEC) into the ana...