Synergistic phosphorus removal mechanism of Tetrasphaera enrichment in a micro-pressure swirl reactor

IF 10.4 1区工程技术 Q1 ENGINEERING, CHEMICAL npj Clean Water Pub Date : 2024-09-16 DOI:10.1038/s41545-024-00389-4

Ge Yu, Hua Kang, Chen Dai, Xinyu Zhu, Shuang Zhong, Fan Wang, Shengshu Ai, Dejun Bian, Donglei Zou

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Abstract

To investigate the effect of Tetrasphaera’s enrichment on phosphorus removal mechanism, three micro-pressure swirl reactor (MPSR) groups were used to experiment on sewage treatment under different SRT (17.2, 50.8, and 68.2 d). Results showed that Tetrasphaera enrichment in the MPSR system was promoted by extending the SRT. After extending the SRT from 17.2 to 68.2 d, the relative abundance of Tetrasphaera increased from 3.1% to 12.1%, and the TP removal efficiency maintained above 92%. The internal circulation results indicated that after extending the SRT, glycogen and polyhydroxybutyrate were co-synthesized during the anaerobic stage, which enhanced the driving force of nutrient removal. Analysis of the microbial composition and functional gene prediction indicated that efficient phosphorus removal can be attributed to the enrichment of Tetrasphaera at long SRT. Overall, the synergistic mechanisms of Tetrasphaera in the organic matter degradation and phosphorus removal processes were integrated into the MPSR.

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微压漩涡反应器中富集四膜虫的协同除磷机制

为研究富集 Tetrasphaera 对除磷机理的影响，采用三组微压漩涡反应器（MPSR）在不同 SRT（17.2、50.8 和 68.2 d）条件下进行污水处理实验。结果表明，延长 SRT 可促进 MPSR 系统中 Tetrasphaera 的富集。SRT 从 17.2 d 延长到 68.2 d 后，Tetrasphaera 的相对丰度从 3.1% 增加到 12.1%，TP 去除效率保持在 92% 以上。内循环结果表明，在延长SRT后，厌氧阶段糖原和多羟基丁酸共同合成，增强了营养物质去除的动力。对微生物组成和功能基因预测的分析表明，高效除磷可归因于长 SRT 阶段 Tetrasphaera 的富集。总之，Tetrasphaera 在有机物降解和除磷过程中的协同机制已被纳入 MPSR。

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来源期刊

npj Clean Water Environmental Science-Water Science and Technology

CiteScore

15.30

自引率

2.60%

发文量

审稿时长

5 weeks

期刊介绍： npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.