Enhancing methane yield of chicken litter in anaerobic digestion using magnetite nanoparticles

Fe3O4 nanoparticles affect paddy soil microbial-driven carbon and nitrogen processes: roles of surface coating and soil types

“…Impacts of nFe 3 O 4 @DMSA and nFe 3 O 4 on gas production Iron oxides are regarded as important electron acceptors in subtropical soils, and organic C in soils might be anaerobically decomposed to CH 4 and CO 2 following the reduction of iron oxides. 29 Many studies have explored the effect of nFe 3 O 4 on CH 4 production, with the results aligning with the trend that nFe 3 O 4 stimulate the methanogenesis under the circumstances of anaerobic digestion, 30 wastewater plants, 31,32 and soil ecosystems. 4,11,33 However, this was not the case observed in this study showing the negligible changes in CH 4 production led by nFe 3 O 4 across all soils.…”

Historical Perspective of the Addition of Magnetic Nanoparticles Into Anaerobic Digesters (2014-2021)

“…In 2019 the enhancement of anaerobic digestion was studied as a method for disinfection and the elimination of antibiotic resistance genes (Xiang et al, 2019;Zhang et al, 2019a;Zhang et al, 2019b), thanks to augmented digestion of the substrate, other added benefit of enhancing biogas production. Since then, a number of tests with positive results in different substrates have been reported, including chicken litter (Aguilar-Moreno et al, 2020), sugar beet waste (Beiki and Keramati, 2019), acetate, propionate, and butyrate under ammonia stressed condition (Lee et al, 2019), phenol (He et al, 2019) and tribromophenol (under microaerobic conditions) (Yang et al, 2019). However the reader should take into account that number of conditions, concentrations of NPs and mode of operation (continuous, semicontinuous or batch) is very large and makes it difficult to interpret and compare results from differents studies.…”

“…However, in the dissolution hypothesis, by adequately (low) dosing the digestors, in analogy with the human drug (Feromuxytol), the provided magnetite is consumed during the process before the next doses are needed, avoiding the need of recycling and the dispersion of NPs into the environment (Casals et al, 2014). During 2019, several reviews on the subject were published (Abdelsalam and Samer, 2019;Baniamerian et al, 2019;Dehhaghi et al, 2019) while today current activity continues introducing different magnetic NPs in different specific anaerobic process (Aguilar-Moreno et al, 2020).…”

Perspectives on Potential Applications of Nanometal Derivatives in Gaseous Bioenergy Pathways: Mechanisms, Life Cycle, and Toxicity

“…To the best of our knowledge, only a robust inoculum can handle the extremely small sizes of NPs. Previous studies indicated that n-Fe 3 O 4 (9 nm), Ni (17 nm), or n-Fe 3 O 4 (4.2 nm) boosted CH 4 productivity 1.7 times, compared to control. , In those studies, the utilized inoculum was manure inoculum and inoculum that was taken from the digester (fed by chicken litter for 3 years).…”