在PN/A中的泥颗粒化增强了从主流无氧预处理废水中去除的能力
Zhen Lei1, Jingjing Xue1, Yongning Feng1
1Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China.
The Science of the total environment
|June 24, 2023
概括
优化废水处理的部分化/亚纳摩克斯 (PN/A) 过程需要仔细控制溶解氧. 通过促进有益细菌的生长,适度的DO与低有氧周期策略显著提高了氨和总去除效率.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学循环 生物地质化学循环
背景情况:
- 部分化/亚纳摩克斯 (PN/A) 对于废水处理至关重要,但由于复杂的细菌相互作用而面临挑战.
- 之前的研究表明,低或高的溶氧 (DO) 水平阻碍了PN/A的效率.
研究的目的:
- 调查不同溶解氧 (DO) 度对无氧预处理废水PN/A工艺的影响.
- 确定一个最佳的DO策略,以提高去除效率和微生物活动.
主要方法:
- 实施适度的DO度与低有氧周期 (MDO-LA) 策略.
- 监测氨 (NH4+) 和总去除效率.
- 评估氨氧化细菌 (AOB) 和厌氧氨氧化细菌 (AnAOB) 的特定活动.
- 分析与循环相关的污泥颗粒特征和基因表达.
主要成果:
- 通过MDO-LA战略,实现了91.5%的NH4+和71.3%的总去除.
- 在MDO-LA条件下,AOB和AnAOB的特定活动得到了显著的增强.
- MDO-LA有利于抑制细菌的洗,并促进了尼特罗斯莫纳斯的生长.
- 污泥颗粒的形成与丰富的AOB促进了Ca. 布罗卡迪亚的生长和微生物质量转移的改善.
结论:
- 该MDO-LA战略为无氧预处理废水的有效PN/A处理提供了一个有希望的方法.
- 优化DO控制对于平衡PN/A系统中的微生物竞争和同是至关重要的.
- 增强的微生物活性和污泥颗粒化有助于提高去除性能.
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