Research on the mechanism of copper removal during electromagnetic enhanced aerobic fermentation of sludge

Minhua Cheng, Bugang Xu, Guangfei Qu, Ping Ning, Nanqi Ren and Hongmei Zou

Renewable Energy, 2024, vol. 231, issue C

Abstract: The migration and transformation of copper during magneto electric assisted aerobic fermentation were studied by establishing a control group, a magnetic assisted group (1.4 mT), an electric assisted group (10 V), and a magneto electric assisted group. The results showed that during the aerobic fermentation process of magnetic assisted sludge, changes in pH, temperature, and microorganisms in the system promoted the dissolution of Cu2+ and its migration from solid sludge to fermentation broth. Due to the presence of an electric field, Cu2+ deposits on the cathode plate through anisotropic attraction, combined with the Lorentz force generated by the magnetic field, promoting mass transfer of copper ions and reducing the concentration of Cu2+ in the fermentation broth, resulting in a copper removal rate of up to 75 %. In addition, the COMSOL simulation results show a consistent overall trend with actual experiments, indicating that the external electric and magnetic fields have a significant inhibitory effect on the removal of heavy metals in sludge.

Keywords: Sludge; Electromagnetic strengthening; Migration and transformation of cu; COMSOL simulation; Removal mechanism (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:231:y:2024:i:c:s0960148124010826

DOI: 10.1016/j.renene.2024.121014

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