Effect of magneto-active filling on the effectiveness of methane fermentation of dairy wastewaters

Abstract

The goal of this study was to determine the effectiveness of methane fermentation of dairy wastewaters in terms of the volume and qualitative composition of biogas produced in an anaerobic reactor with magneto-active filling (MAF) mounted in the zone of hydrolysis and acidogenesis. Experiments were conducted in the fractional-technical scale in a vertical fermentation reactor with a labyrinth flow. Synthetic dairy wastewaters prepared based on milk powder were used as a substrate. The analyzed filling was made of plastic covered with iron and copper powders and was additionally equipped in fluid magnetizers (FM) in the form of neodymium magnets. The study demonstrated that MAF incorporation into the technological system significantly improved effectiveness of biogas production, increased methane concentration and lowered content of hydrogen sulfide in gaseous metabolites of fermentative bacteria. A significant increase was also observed in the effectiveness of COD removal from dairy wastewaters. Reported experiments proved a correlation between the effectiveness of methane fermentation and number of MAF elements introduced into the anaerobic reactor.

The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge

“…11.4 mT (±2%) was found to be the optim strength, leading to an increase in biogas production of 19.5% against the non-SMF [54]. Similarly, Dębowski et al (2014) found that SMF exerted a positive effect o The present study showed no significant (p = 0.05) effect of SMF on biogas yie ranged between 621 ± 37 dm 3 /kgVS (V1) and 662 ± 42 dm 3 /kgVS (V3) (Figure daily production was close to 5 dm 3 /day regardless of SMF exposure time (Figur correlation was also observed between the process variant used and the biog (Figure 2). Zhao et al (2020) reported opposite results, indicating SMF could potentially biogas production by converting agricultural waste into energy.…”

Algae biomass as an alternative substrate in biogas production technologies—Review

“…The earlier own investigations [90,91] The increased effectiveness of the fermentation process during co-fermentation of algae biomass and other organic substrates is ascribed to its synergistic effects occurring during anaerobic degradation of the substrate mixture. The biomass of algae serves as a source of nitrogen and microelements indispensable for the appropriate growth of anaerobic microorganisms.…”

Simulated Dairy Wastewater Treatment in a Pilot Plant Scale Magneto-Active Hybrid Anaerobic Biofilm Reactor (Ma-Habr)

“…A new packing material produced by extrusion method was characterized by microspheres, which increase the active surface accessible to anaerobic microorganisms and catalytic properties due to the presence of metal ions (Cu and Fe) and magnetic activators. In laboratory and small scale, the application of the new magneto-active media in AD of dairy wastewater enhanced organic matter removal and phosphorus removal and improved biogas production (Zieliński et al, 2015;Dębowski et al, 2014). However, this innovative solution has not been used before in dairy wastewater treatment on a large scale.…”