Static magnetic field enhanced methane production via stimulating the growth and composition of microbial community

Kinetics and Nanoparticle Catalytic Enhancement of Biogas Production from Wastewater Using a Magnetized Biochemical Methane Potential (MBMP) System

“…This adsorption mechanism of the supermagnetic and metal-supported NPs onto the activated sludge surface was due to the presence of the external magnetic field. This conforms to the results obtained by Zhao et al [28] and Zaidi et al [30], who reported on the magnetic effect on substrate surface complexation, pore structure, functional groups, ions exchange, hydrogen and chemical bonds. Figure 9 shows the EDS results of the activated sludge post-adsorption of the elemental distribution on the surface.…”

“…Their average surface thickness (Figure 8A-C) appears to be 6.36 mm > 5.90 mm > 5.33 mm for B > A > C respectively when viewed at 20.8 µ m under a scale of 5 µ m. This result agrees with Deepanra et al [29] and Zaidi et al [30], who stated that supermagnetic and metallic-supported nanoparticles can influence the surface area and consequently adsorptive activities. Additional reports also suggest that nanoparticle size can be of a wide range of 5 nm to 250 nm, which denotes the NPs acted as a catalyst for the bio-degradation [28,30,31]. Figure 9 shows the EDS results of the activated sludge post-adsorption of the elemental distribution on the surface.…”

“…This result agrees with Deepanra et al [29] and Zaidi et al [30], who stated that supermagnetic and metallic-supported nanoparticles can influence the surface area and consequently adsorptive activities. Additional reports also suggest that nanoparticle size can be of a wide range of 5 nm to 250 nm, which denotes the NPs acted as a catalyst for the bio-degradation [28,30,31].…”

“…This phenomenon might be due to the decreased number of active methanogens and structural modification of the bacteria components caused by the impact of the magnetic field [26][27][28]. In addition, the inactivation of bacterial cells or a decrease in bacterial fission rate along with the nanoparticles could have inhibited the system after the 14th day to the 21st day [28]. Figure 7 shows the methane content (Figure 7a) and biogas production (Figure 7b) monitored on a weekly basis (7th, 14th and 21st days).…”

Prospects and application of ultrasound and magnetic fields in the fermentation of rare edible fungi

“… [118] , [119] Auxiliary microbial fermentation The magnetic field changes the physicochemical properties of fermentation substrate; affects the microstructure of microbial cells; accelerates the mobility of cell membrane lipids; and promotes cell growth. [38] , [69] , [70] , [120] , [121] , [122] Strain mutagenesis The magnetic field affects the structure of cellular genetic material, causing changes in genomic DNA and regulating gene transcription and expression. 118 [123] Auxiliary sterilization The magnetic field affects the morphology of bacteria, causing cell shrinkage and leakage of contents.…”