了解电活性生物膜的尾流行为 实现生物化学氧气需求的快速测量
Xuejun Yan1, Ziyuan Wang1, Chengmei Liao1
1MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
Environmental science & technology
|February 1, 2024
概括
微生物电化学传感器提供了快速的生化氧需求 (BOD) 测量. 一个新的模型预测了尾部阶段的传感器输出,为高效的废水分析减少了96%的测量时间.
科学领域:
- 环境科学 环境科学
- 电化学 电化学 电化学
- 微生物学 微生物学
背景情况:
- 使用电活性生物膜 (EAB) 的微生物电化学传感器显示出对生化氧需求 (BOD) 测量有前途.
- 目前使用这些传感器进行BOD评估的方法由于库伦比收益率的长期积累而耗时.
研究的目的:
- 研究BOD降解尾部阶段 (TS) 中电流输出和EAB代谢之间的相关性.
- 开发库伦比收益率的预测模型,以加快BOD测量.
主要方法:
- 分析电流-时间曲线以确定具有低电子收获效率的尾部阶段 (TS).
- 研究EAB代谢补偿策略,包括基质代谢和内部聚合物消耗.
- 开发和验证使用真实家庭废水的尾部阶段预测模型 (TSPM).
主要成果:
- 在TS中,EAB采用代谢补偿策略,例如利用储存的聚合物 (糖原,脂肪酸),导致库伦比效率超过100%.
- 尾流呈现出一个一致的,独立于度的指数衰变模式.
- TSPM准确地预测了库伦比克产量,将BOD测量时间缩短了96% (至~0.5小时),偏差为<4 mg/L.
结论:
- 尾部阶段的当前动态提供了细菌基质储存,消耗和适应营养有限环境的见解.
- 开发的TSPM显著加速BOD测量,使微生物电化学传感器更为实用,用于实时废水监测.
- 这项研究为基于了解EAB代谢反应的基础增强BOD传感器开发奠定了基础.
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