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生物炭作为氨交换生物膜载体,用于增强活性污泥中的有氧化

Mariah Dorner¹, Sebastian Behrens¹

¹University of Minnesota, Department of Civil, Environmental, and Geo-Engineering, 500 Pillsbury Drive, S.E., Minneapolis, MN 55455-0116, USA; University of Minnesota, BioTechnology Institute, 1479 Gortner Avenue, St. Paul, MN 55108-6106, USA.

Bioresource technology

|August 29, 2024

概括

生物炭通过促进活性污泥中氨的去除来增强废水处理. 它丰富有益的细菌,改善化和总去除,即使在酸性条件下.

科学领域:

环境微生物学环境微生物学
水处理工程水处理工程
生物地质化学生物地质化学

背景情况:

活性污泥中的化对于从废水中去除氨非常重要.
化过程中的酸化可以抑制微生物活动,降低处理效率.
生物炭是改善废水处理过程的潜在修正案.

研究的目的:

研究生物炭对活性污泥中有氧化作用的影响.
为了评估生物炭对氨和Kjeldahl总去除的影响.
了解生物炭对氨氧化细菌 (AOB) 和pH动态的影响背后的机制.

主要方法:

测序批量反应器 (SBR) 用于比较生物炭修改和控制系统.
使用定量PCR (qPCR) 来评估氨氧化细菌 (AOB) 的丰富性.
使用pH敏感的光探针测量生物薄膜中的pH在生物炭表面.

主要成果:

生物炭反应堆的氨排放量显著降低 (87-94%),Kjeldahl总去除量更高 (16-71%).
在生物炭修改反应器中,AOB (amoA/16S rRNA基因) 的相对丰度显著更高.
在生物炭表面上丰富了AOB,表明了优先殖民.
生物炭上的生物膜保持中性pH (>6.7) 尽管反应堆酸化,保持生物炭的吸收能力.

结论:

通过丰富AOB,添加生物炭可以改善活性污泥中的化和去除.
生物炭的微生物殖民创造了一个pH缓冲的微环境,维持AOB活动和生物炭的吸收能力.
生物炭是一种有希望的材料,可以提高废水处理中的有氧化效率和稳定性.

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