动态脉冲方法提高主流Anammox工艺稳定性:整合侧流支持和解决酸盐氧化细菌的挑战
Yanxiao Wei1, Yujie Chen1, Weizhe Xia1
1Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki-Aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Bioresource technology
|January 19, 2024
概括
酸盐氧化细菌 (NOB) 破坏部分化和Anammox (PN/A) 过程. 使用"脉冲疗法"和Anammox污泥侧流再培的新策略有效控制了NOB,改善了PN/A过程稳定性.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理工程 废水处理工程
背景情况:
- 酸盐氧化细菌 (NOB) 对部分化和Anammox (PN/A) 工艺的稳定性和应用构成重大挑战.
- 在PN/A系统中,NOB的占主导地位导致去除效率下降.
研究的目的:
- 为了研究增加加载率对一级PN/A反应堆的影响.
- 为了识别占主导地位的NOB物种,并了解NOB繁殖的机制.
- 开发和评估一项用于控制NOB和恢复PN/A过程性能的综合战略.
主要方法:
- 一个单阶段PN/A反应堆的连续运行,加载率逐步增加 (0.4至0.8gN/L/d).
- 使用分子技术识别和量化NOB物种.
- 实施一个一个的实施.
- 脉冲疗法是一种脉冲疗法.
- 这一策略与Anammox污泥的侧流再生耕作相结合.
主要成果:
- 随着加载率的增加,除效率从71%降至41%.
- 尼特洛斯皮拉_sp._OLB3_OLB3_OLB3_OLB3_OLB3_OLB3_OLB3_OLB3
- 被确定为主要的NOB,其相对丰度从0.9%增加到4.3%.
- 开发的治疗策略有效控制了NOB,并在两个月内持续改善PN/A表现.
结论:
- 增加加载率有利于NOB的扩散,损害了PN/A的工艺效率.
- "脉冲疗法"和侧流再培养受损颗粒性污泥的联合方法是减轻NOB主导地位的可行策略.
- 在侧流中重新培养至少50%的受损酸 (HAP) 颗粒污泥可以克服主流PN/A应用中的瓶.
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