盐度和时间对间歇式沙生物反应器中污水处理生物膜的结构和功能潜力的影响。

IF 0.8 4区 生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Kristen Conroy, Jelmer Poelstra, Karen Mancl
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引用次数: 0

摘要

海产品和腌制加工等行业会产生高盐废水。事实证明,此类废水中的盐分会对生物处理效果产生负面影响。人们对成熟生物处理系统中微生物群落结构的变化、盐度对群落组成的影响以及运行期间随时间的变化知之甚少。具体来说,本研究使用了间歇式砂生物反应器(ISB),重点是氨氮处理。这项研究旨在通过 16s rRNA 测序和 KEGG 功能预测,确定微生物群落因盐分和运行天数而发生的变化。结果表明,当废水含盐量在 0%-1.3% 之间变化时,整体群落结构和多样性各不相同。在盐度为 1.3% 时,污水处理厂中常见的 Zoogloea 属不复存在,Aequorovita、Thaura 和 Dokdonella 成为优势菌属。亚硝单胞菌是一种重要的氨氧化细菌,其丰度随着运行天数的增加而增加,但盐度的增加对其影响不大。在所有测试的间歇式砂生物反应器中,随着运行时间的延长,预计硝化潜力也会增加,这进一步证实了上述发现。这些结果加深了人们对盐度对生物处理系统中微生物群落发展的影响的理解,并阐明了群落结构在运行初期和系统成熟期发生的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of salinity and time on structure and functional potential of wastewater treatment biofilms in intermittent sand bioreactors.

High salt wastewater is produced in industries, including seafood and pickling processing. The salinity in such wastewaters has been shown to negatively impact biological treatment efficacy. Little is known about the changes in the microbial community structure in the mature biological 2 treatment systems, the impacts of salinity on community composition, and the shifts over time during operation. This study aimed to identify the changes in the microbial community due to both salt and days of operation through 16s rRNA sequencing and KEGG functional predictions. Intermittent sand bioreactors (ISBs) with a focus on ammonia treatment were utilized. Results showed that the overall community structure and diversity were distinct as wastewater salinity varied from 0%-1.3%. At 1.3% salinity Zoogloea, a common genus in wastewater treatment plants, was not present and Aequorovita, Thauera and Dokdonella became the dominant genera. Nitrosomonas, an important ammonia oxidizing bacteria, increased in abundance with days of operation but was not significantly impacted by an increase in salinity. This finding was further supported by an increase in predicted nitrification potential with time of operation within all intermittent sand bioreactors tested. These results provide a deeper understanding of the impacts of salinity on microbial community development in biological treatment systems and elucidate the shifts in community structure occurring during early operations and into system maturity.

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来源期刊
Journal of General and Applied Microbiology
Journal of General and Applied Microbiology 生物-生物工程与应用微生物
CiteScore
2.40
自引率
0.00%
发文量
42
审稿时长
6-12 weeks
期刊介绍: JGAM is going to publish scientific reports containing novel and significant microbiological findings, which are mainly devoted to the following categories: Antibiotics and Secondary Metabolites; Biotechnology and Metabolic Engineering; Developmental Microbiology; Environmental Microbiology and Bioremediation; Enzymology; Eukaryotic Microbiology; Evolution and Phylogenetics; Genome Integrity and Plasticity; Microalgae and Photosynthesis; Microbiology for Food; Molecular Genetics; Physiology and Cell Surface; Synthetic and Systems Microbiology.
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