Weak magnetic field affected microbial communities and function in the A/O/A sequencing batch reactors for enhanced aerobic granulation

Lyu, Wanlin; Song, Qunliang; Shi, Jian Jian; Wang, Bin; Hu, Xiaoling

doi:10.1016/j.seppur.2021.118537

Cited by 25 publications

(1 citation statement)

References 51 publications

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“…The study found that a static magnetic field can accelerate the start-up of the nitritation process and improve its performance by changing the microbial community structure and improving the HAO activity, the Cyt c content, and ETSA as well as the energy generation of microorganisms. Lyu et al [ 63 ] reported that a magnetic field at 10 mT could increase the abundance and diversity of microbial communities, promoting the secretion of tryptophan and aromatic proteins.…”

Section: Resultsmentioning

confidence: 99%

Experimental Prototype of Electromagnetic Emissions for Biotechnological Research: Monitoring Cocoa Bean Fermentation Parameters

Guzmán-Armenteros

Ruales

Villacís-Chiriboga

et al. 2023

Foods

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A Helmholtz-type electromagnetic emission device, which uses an oscillating magnetic field (OMF), with potential applications in biotechnological research, was built and validated. The coils were connected to an alternating current (AC) generator to generate a 0.5 to 110 mT field at their center. OMF measurements were performed with a Hall effect sensor with a digital signal connection (Arduino nano) and data output to a PC using LabVIEW v2017SP1 software. The fermentation process of the cocoa bean variety CCN 51, exposed to four levels of OMF density for 60 min (0, 5, 40, and 80 mT/60 min), was analyzed. Different variables of the grain fermentation process were evaluated over six days. The ANOVA test probed the device’s linearity, accuracy, precision, repeatability, reliability, and robustness. Moreover, CCN 51 cocoa beans’ EMF-exposure effect was evaluated under different OMF densities for 60 min. The results show the validity of the equipment under working conditions and the impact of EMF (electromagnetic fields) on the yield, deformation, and pH of cocoa beans. Thus, we concluded that the operation of the prototype is valid for use in biotechnological studies.

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Section: Resultsmentioning

confidence: 99%