分层微生物细胞外聚合物质对微藻主导生物膜形成和在批量和半连续运行下营养周转的影响
Jing-Tian Zhang1, Jian-Xia Wang1, Yang Liu1
1MOE Key Laboratory of Bio-Intelligent Manufacturing, School of Bioengineering, Dalian University of Technology, Dalian 116024 PR China.
Bioresource technology
|January 29, 2025
概括
微藻生物膜中的分层细胞外聚合物 (EPS) 增强了营养物质的去除. 紧密结合的EPS显著丰富了和,提高了营养物质的整体循环效率.
科学领域:
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
- 水处理 处理水的方法
背景情况:
- 已知细胞外聚合物质 (EPS) 促进微藻生物膜的形成.
- 在微藻生物膜中分层EPS的具体作用,特别是关于营养丰富的作用,尚不清楚.
- 虽然细菌EPS可以丰富,但微藻生物膜分层EPS的营养丰富能力仍未明确.
研究的目的:
- 研究分层细菌EPS对微藻生物膜发育和营养物质去除的影响.
- 确定最佳的微藻与细菌的比率,以形成生物膜和去除营养.
- 阐明可溶性,宽松结合 (LB-EPS) 和紧密结合 (TB-EPS) EPS 在营养丰富中的作用.
主要方法:
- 微藻和分层细菌EPS在各种微藻:细菌比率下注射,以研究生物膜生长和营养物质的去除.
- 在半连续运行下监测生物膜特性和营养物质去除效率.
- 液压保留时间 (HRT) 变化以评估其对营养周转的影响.
主要成果:
- 溶性EPS促进了生物膜的形成和的合成.
- 松束 (LB-EPS) 和紧束 (TB-EPS) 的EPS显著改善了去除.
- 与LB-EPS相比,紧固结合的EPS (TB-EPS) 证明了 (高达7.9倍) 和 (高达23.8倍) 的创新丰富.
- 确定了一个最佳的微藻:细菌细胞计数比为1:0.5.
- 在2天的液压保留时间 (HRT) 中实现了稳定有效的营养物质去除.
- 更高的HRTs提高了营养物质周转效率.
结论:
- 分层EPS在微藻生物膜的发展和营养物质的循环中起着至关重要的作用.
- 紧密结合的EPS在微藻生物膜中丰富和方面特别有效.
- 这些发现为微藻系统中分层EPS的营养丰富能力提供了直接证据,为废水处理提供了洞察力.
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