[在长期饥饿条件下ANAMMOX反应堆的启动和恢复性能]
Fan Feng1,2, Xi Tang1,2, Chong-Jian Tang1,2
1School of Metallurgy and Environment, Central South University, Changsha 410083, China.
Huan jing ke xue= Huanjing kexue
|July 18, 2024
概括
通过注射去化污泥,改善了ANAMMOX反应堆的启动和恢复. 细胞外聚合物和特定基因表达在饥饿期间保护了ANAMMOX细菌,提高了去除效率.
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:
- 由于ANAMMOX细菌的缓慢生长和丰富挑战,ANAMMOX技术的应用受到限制.
- 有限的基质供应导致长期饥饿,阻碍了ANAMMOX反应堆的稳定运行.
- 了解启动,恢复和饥饿抵抗机制对于ANAMMOX过程稳定性至关重要.
研究的目的:
- 重新检查ANAMMOX反应堆启动和恢复性能.
- 为了确定ANAMMOX细菌对长期饥饿的抵抗机制.
- 优化操作条件,以提高去除效率.
主要方法:
- 在各种条件下,ANAMMOX反应堆被用化和脱污泥接种.
- 在不同的启动程序下评估了耐受性机制和恢复性能.
- 分析了基因表达 (nirS,hzsA,hdh) 和微生物社区结构.
主要成果:
- 无化污泥注射导致反应堆稳定运行,基质度高,流量低,实现高去除效率.
- 在低基质度和高流速下,饥饿后恢复进一步增强了气的去除.
- 细胞外聚合物物质在饥饿期间保护了细菌,特定的基因表达维持了ANAMMOX活性.
结论:
- 无化污泥注射对于ANAMMOX反应堆的启动和稳定的运行是有效的.
- 亚纳莫克斯细菌拥有包括EPS生产和特定基因表达在内的机制,以抵御长期饥饿.
- 候选Kuenenia表现出对饥饿的增强耐受性,表明其具有强大的ANAMMOX过程的潜力.
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