Enhancement and mechanism of heterotrophic ammonia assimilation in saline wastewater treated by intermittent magnetic field.

IF 9 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-10-06 DOI:10.1016/j.biortech.2025.133447

Wenhao Zhang, Chuanfu Zhao, Mengru Zhang, Fei Han, Weizhi Zhou

{"title":"Enhancement and mechanism of heterotrophic ammonia assimilation in saline wastewater treated by intermittent magnetic field.","authors":"Wenhao Zhang, Chuanfu Zhao, Mengru Zhang, Fei Han, Weizhi Zhou","doi":"10.1016/j.biortech.2025.133447","DOIUrl":null,"url":null,"abstract":"<p><p>Heterotrophic ammonia assimilation (HAA) enhanced by magnetic field (MF) exposure offers a promising strategy for improving the treatment efficiency of high-salinity wastewater. This study investigated the quantitative regulation of MF exposure time, examining how different MF duty cycles impact the performance of HAA bioreactors with the aim of optimising pollutant removal efficiency and reducing processing costs. The results demonstrated that intermittent magnetic field (IMF) exposure maintained consistently high metabolic activity and nitrogen assimilation capacity in HAA bacteria by improving the utilisation efficiency of electron donors and energy. A 3 h-on/9h-off duty cycle (25 %) achieved the optimal balance between positive stimulation and stress mitigation, leading to a 27.6 % improvement in ammonia removal efficiency. IMF exposure not only upregulated key enzymes and functional genes involved in ammonium assimilation but also selectively enriched MF-responsive genera such as Planktosalinus and Marinobacter, thereby enhancing the ecological adaptability and functional resilience of the microbial community. Overall, this study provides valuable insights into the development of energy-efficient and biologically robust saline wastewater treatment systems.</p>","PeriodicalId":258,"journal":{"name":"Bioresource Technology","volume":" ","pages":"133447"},"PeriodicalIF":9.0000,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioresource Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.biortech.2025.133447","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRICULTURAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

Heterotrophic ammonia assimilation (HAA) enhanced by magnetic field (MF) exposure offers a promising strategy for improving the treatment efficiency of high-salinity wastewater. This study investigated the quantitative regulation of MF exposure time, examining how different MF duty cycles impact the performance of HAA bioreactors with the aim of optimising pollutant removal efficiency and reducing processing costs. The results demonstrated that intermittent magnetic field (IMF) exposure maintained consistently high metabolic activity and nitrogen assimilation capacity in HAA bacteria by improving the utilisation efficiency of electron donors and energy. A 3 h-on/9h-off duty cycle (25 %) achieved the optimal balance between positive stimulation and stress mitigation, leading to a 27.6 % improvement in ammonia removal efficiency. IMF exposure not only upregulated key enzymes and functional genes involved in ammonium assimilation but also selectively enriched MF-responsive genera such as Planktosalinus and Marinobacter, thereby enhancing the ecological adaptability and functional resilience of the microbial community. Overall, this study provides valuable insights into the development of energy-efficient and biologically robust saline wastewater treatment systems.

查看原文本刊更多论文

间歇磁场对含盐废水异养氨同化的增强作用及其机理。

磁场增强异养氨同化（HAA）是提高高盐废水处理效率的一种有前景的策略。本研究考察了中频暴露时间的定量调控，考察了不同中频占空比对HAA生物反应器性能的影响，旨在优化污染物去除效率，降低处理成本。结果表明，间歇性磁场（IMF）暴露可提高HAA细菌对电子供体和能量的利用效率，从而保持其较高的代谢活性和氮同化能力。3 h-on/9h-off占空比（25 %）实现了正刺激和应力缓解之间的最佳平衡，导致氨去除效率提高27.6 %。IMF暴露不仅上调了参与铵同化的关键酶和功能基因，而且选择性地丰富了浮游盐菌和海洋杆菌等对mf有反应的属，从而增强了微生物群落的生态适应性和功能恢复力。总的来说，这项研究为开发节能和生物健壮的含盐废水处理系统提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.