在气泡柱生物反应器中基于生物气的ectoine生产期间优化甲气-液体质量转移
María Del Rosario Rodero1, Víctor Pérez1, Raúl Muñoz1
1Institute of Sustainable Processes, University of Valladolid, 47011, Valladolid, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering. University of Valladolid, Dr. Mergelina s/n., 47011, Valladolid, Spain.
Journal of environmental management
|July 13, 2024
概括
将生物气价值化为ectoine提供了一个具有竞争力的市场替代方案. 在生物反应器中优化空床停留时间 (EBRT) 提高了甲转化和有价值的生物产品产量.
科学领域:
- 生物技术和生物工程 生物技术和生物工程
- 环境科学与工程环境科学与工程
- 生物化学工程 生物化学工程
背景情况:
- 可再生能源价格下降对生物气的利用构成了挑战.
- 生物气的价值化成高价值产品如ectoine提供了一个可持续的替代方案.
- 埃克托因是一种有价值的 osmoprotectant,在化品和药品中具有应用.
研究的目的:
- 为了优化甲 (CH4) 气体液体质量转移在泡柱生物反应器中用于生化和化生产.
- 研究空床停留时间 (EBRT) 和膜扩散器孔径大小对CH4转换效率和生物产品产量的影响.
- 通过高效的生物工艺设计,提高生物气体利用的经济可行性.
主要方法:
- 在10L气泡柱生物反应器中利用混合甲类培养物.
- 评估的EBRT时间为27,54和104分钟,使用0.3和0.6毫米孔径的膜扩散器.
- 测量了CH4消除能力 (CH4-ECs),生物质的增长和ectoine/hydroxyectoine的积累.
主要成果:
- 54分钟的EBRT产生了最佳的CH4-ECs (21-24 g m-3 h-1),显著的生物质增长 (0.17 g L-1 d-1),以及最大的ectoine (79 mg gVSS-1) 和hydroxyectoine (13 mg gVSS-1) 积累.
- 104分钟的EBRT导致CH4限制和微不足道的生物质增长,而27分钟的EBRT导致微生物抑制.
- 扩散器孔径为0.6毫米,表现略高于0.3毫米,但EBRT是更关键的参数.
结论:
- 优化EBRT对于高效的CH4转化和生物气高价值生物产品合成至关重要.
- 54分钟的EBRT提供了一个有前途的操作窗口,以最大限度地提高乙和乙的生产.
- 这项研究表明了竞争性生物气利用的可行策略,有助于实现碳中和目标.
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