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首页> 外文期刊>Energy Conversion & Management >Biomethane production using an integrated anaerobic digestion, gasification and CO_2 biomethanation process in a real waste water treatment plant: A techno-economic assessment
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Biomethane production using an integrated anaerobic digestion, gasification and CO_2 biomethanation process in a real waste water treatment plant: A techno-economic assessment

机译：在真实的废水处理厂中使用厌氧消化，气化和CO_2生物甲烷化工艺综合生产生物甲烷：技术经济评估

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摘要

The biomethanation of CO2 from anaerobic digestion within the power to gas concept has recently emerged as a promising technology to upgrade biogas, to decarbonise the domestic and industrial heat sector, provide long term energy storage and deliver grid balancing services. In addition, the utilisation of the digestate, through a process such as gasification, offers a circular economy approach and has the potential to enhance the deployment of power to gas systems. To this direction, the study focuses on exploring the techno-economic feasibility of coupling biomethanation with digestate gasification for the wastewater industry. The study constitutes the first endeavour to assess the viability of such an integrated energy system. Four different scenarios have been designed and assessed. The energy efficiency of the concepts lies between 26.5% and 35.5% while the minimum selling price (MSP) of biomethane is in the range of 135-183 pound/MWh. The implementation of appropriate policy mechanisms and the inclusion of by-products revenues reduces the MSPs by approximately 32%-42%. The conduction of a typical sensitivity analysis has identified the electricity price as the prime cost driver and this is followed by the cost of the electrolyser or the gasification plant depending on the scenario. Finally, a 2030 analysis, that incorporates projected techno-economic advances, has been carried out and revealed that under certain circumstances profits can be generated.
机译：从电力到天然气的概念，厌氧消化过程中的二氧化碳生物甲烷化已成为一种有前途的技术，可用于升级沼气，使家庭和工业供热部门脱碳，提供长期能源存储并提供电网平衡服务。另外，通过诸如气化之类的过程对消化物的利用提供了循环经济的方法，并具有增强向天然气系统供电的潜力。为此，本研究着重探讨将生物甲烷化与消化气化结合用于废水工业的技术经济可行性。该研究是评估此类综合能源系统可行性的第一项努力。已经设计和评估了四种不同的方案。这些概念的能效介于26.5％和35.5％之间，而生物甲烷的最低售价（MSP）在135-183磅/兆瓦时的范围内。实施适当的政策机制以及包括副产品收入，可使MSP降低约32％-42％。进行典型的敏感性分析后，已将电价确定为主要成本驱动因素，然后根据情况，其次是电解池或气化装置的成本。最后，已进行了一项2030年分析，其中纳入了预计的技术经济进步，并揭示了在某些情况下可以产生利润。

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