实施用于空间应用的褐飞虱收获和培养基回收自动化流程

IF 2.6 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Frontiers in Astronomy and Space Sciences Pub Date : 2023-12-13 DOI:10.3389/fspas.2023.1229043
Jordan Tallec, Marie Vandermies, Céline Coene, Brigitte Lamaze-Lefebvre, Dries Demey, M. Frappart, E. Couallier
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引用次数: 0

摘要

未来的长期太空探索任务需要实施循环生命支持系统,以便从任务废物中提供水、氧气和食物。因此,需要解决处理多相流的分离系统问题。生物收获(BHV)研究侧重于太空中的固/液分离,目的是演示在轴生条件下从蓝藻培养液中连续分离和收获蓝藻。蓝藻生物质将用于进一步的食品加工,而不含有机物并重新获得营养物质的培养液则应直接循环到光生物反应器(PBR)中。本研究建立了一个基于两步流程的自动面包板模型。首先,生物质收集装置(BHU)通过死端过滤将 PBR 中产生的生物质从培养基中分离出来。其次,培养基过滤单元(MFU)利用横流过滤进一步处理培养基,以保留溶解的有机化合物。BHU 和 MHU 的性能在间歇模式和短时连续模式下均符合要求:BHU 能够截留所有生物量,MFU 能够截留 90% 以上的有机物,同时对营养物质具有渗透性。MFU 的生产率也很高,渗透通量大,每天可处理 80 升目标培养物。然而,由于生物质在 BHU 过滤器上积聚成具有高比阻的粘性滤饼,尽管有反冲洗循环和强烈振动,BHV 技术仍无法实现长期连续运行。因此,今后的工作将集中在这一关键步骤上,通过防止滤板结垢来提高工艺性能。
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Implementation of an automated process for Limnospira indica harvesting and culture medium recycling for space applications
Future long-term space exploration missions require the implementation of circular life support systems for the supply of water, oxygen and food from mission wastes. Therefore, separation systems dealing with multi-phasic streams need to be addressed. The BioHarvest (BHV) study focused on solid/liquid separation in space with the aim to demonstrate the continuous separation and harvesting of the cyanobacterium Limnospira indica from its culture broth under axenic conditions. The cyanobacterium biomass is intended to be used for further food processing while the broth free of organic matter and resupplied with nutrients should be directly recycled into the photobioreactor (PBR). In this study, an automated breadboard model based on a two-step process was built. First, a Biomass Harvesting Unit (BHU) separates the biomass produced in the PBR from the culture medium with dead-end filtration. Second, the Medium Filtration Unit (MFU) further treats the culture medium to retain the dissolved organic compounds using crossflow filtration. The performances of BHU and MHU met the requirements in batch mode and in short continuous mode: the BHU was able to retain all the biomass and the MFU could retain more than 90% of organic matter while being permeable to nutrients. The productivity of the MFU was also very good, with a high permeation flux allowing treating the targeted 80 L of culture per day. However, continuous operation of the BHV technology could not be achieved in the long term due to biomass accumulation as a sticky cake with a high specific resistance on the BHU filter, despite backwashing cycles and intense vibrations. Future work shall therefore focus on this critical step, to improve process performance by preventing fouling of the filter sheets.
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来源期刊
Frontiers in Astronomy and Space Sciences
Frontiers in Astronomy and Space Sciences ASTRONOMY & ASTROPHYSICS-
CiteScore
3.40
自引率
13.30%
发文量
363
审稿时长
14 weeks
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