乳衍生生物刺激剂增强了膜生物反应器中QQ介导的生物污染缓解
Xinjiao Dong1,2,3, Xiaoyu Wang1, Xiaohui Chen1
1College of Life and Environmental Science, Wenzhou University, Cha-Shan Town, Wenzhou, Zhejiang Province, 325035, People's Republic of China.
概括
像GCL和GHL这样的生物刺激剂增强了定数灭 (QQ) 细菌,以减少生物反应器中的膜生物污染. 这一策略通过破坏细菌通信信号,有效降低了跨膜压力.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 膜生物反应器 (MBR) 中的膜生物污染是一个重大的运营挑战.
- 定数灭 (QQ) 是通过破坏细菌的定数感应 (QS) 来减轻生物污染的有效策略.
- 生物刺激剂在增强QQ细菌对生物污染控制的作用尚未得到充分研究.
研究的目的:
- 调查生物刺激剂的潜力,以提高Stentrophomonas Y6.的QQ活性.
- 为了评估特定化合物 (GCL,GHL,6-caprolactone,acetanilide) 在缓解膜生物污染方面的疗效.
主要方法:
- 在MBR系统中对QQ细菌菌株Stentrophomonas Y6进行了四种潜在生物刺激剂的测试.
- 监测生物刺激剂对跨膜压力 (TMP) 的影响,作为生物污染的指标.
- 通过比较TMP减少与没有生物刺激剂应用来评估QQ活动增强.
主要成果:
- 10毫克/升的γ-caprolactone (GCL) 和20毫克/升的γ-heptalactone (GHL) 显著刺激了Stentrophomonas Y6.
- GCL和GHL的应用使MBR的跨膜压力从30kPa降低到平均13kPa.
- 6-caprolactone和acetanilide对QQ活性或生物污染减轻没有显著影响.
结论:
- GCL和GHL可以作为有效的生物刺激剂来增强QQ细菌的作用,用于MBR中的膜生物污染控制.
- GCL和GHL与N-化同类素乳 (AHLs) 的结构相似性可能解释了它们的生物刺激作用.
- 这项研究强调了使用QQ细菌和向生物刺激剂改善MBR性能的一种有希望的方法.
相关概念视频
Biofilms
287
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
287
Gene Regulation in Microbial Communities: Quorum Sensing
97
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
97
Bioremediation
20.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
20.2K
Bacterial Signaling
34.4K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
34.4K
Biological Methods for Microbial Control
213
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
213


