讲座题目：Closing CO2 loop in biogas production: Roles of membrane technology
报告时间：2017年12月28日（周四）上午9:00 - 10:00
赵帅飞，独立研究员，博士生导师，现就职于澳大利亚麦考瑞大学。以高效、低能和环保的新型膜分离技术为研究重点，研究工作涉及最前沿和热门的正渗透膜分离技术，有望利用工业废热的膜蒸馏技术，废热回收利用的膜冷凝技术以及膜接触器技术。现已发表国际期刊论文33篇，总引用1400余次。赵博士先后被26个国际著名杂志，如：Science, Journal of Membrane Science, Environmental Science & Technology, Chemical Engineering Journal，Water Research等，受邀审稿70多篇；同时，三次受邀去行业内的国际学术研讨会上做会议报告。
As a renewable energy source, biogas is produced through anaerobic digestion, and plays a vital role in supplying sustainable energy and minimising greenhouse emissions. Here we propose and demonstrate a novel system for simultaneous ammonia recovery, carbon capture, biogas upgrading and fertiliser production in biogas production. This novel system involves two membrane processes, including vacuum membrane distillation (VMD) and membrane absorption. VMD is used to recover ammonia from biogas slurry at various conditions. The ammonia removal efficiency by VMD is around 75% regardless of the ammonia concentration of the feed biogas slurry. After ammonia recovery, the treated biogas slurry has significantly reduced phytotoxicity, improving the applicability for agricultural irrigation. The recovered ammonia is used to absorb CO2 in the biogas gas by a membrane contactor. Biogas upgrading performance is highly dependent on the gas and liquid flow rates. The recovered ammonia flowing on the tube side leads to 50% higher CO2 removal efficiency than the other flow mode. After CO2 absorption, the product can be used as fertilizers. The novel system shows great potential in closing CO2 loop in biogas production by recycling ammonia as an absorbent for CO2 absorption associated with fertilizer generation.