Review of impact of nanoparticle additives on anaerobic digestion and methane generation

Ajay, C.M.; Mohan, Sooraj; Dinesha, P.; Rosen, Marc A.

doi:10.1016/j.fuel.2020.118234

Cited by 102 publications

(57 citation statements)

References 89 publications

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“…Comparatively, bioreactor A was found with the lowest digestate at 142.55 mgTS/L, corresponding to the highest biogas of 400 mL/d, whereas bioreactor E, being the control system, was found to be the lowest with biogas of 130 mL/day and biomass of 241.31 mg TS/L. Lower yield of the digestate was observed among the bioreactors charged with the MNPs, suggesting that there was significant microbial activity which resulted in the degradation of the organics during biogas production [2,[17][18][19][20]. Conversely, for bioreactor E (control), the difference in the digestate compared to the other reactors was enormous, such that less microbial activity occurred [2,18].…”

Section: Digestate Degradation and Biogas Productionmentioning

confidence: 93%

“…Bioenergy production has been seen as one of the most environmentally friendly solutions available for the degradation of chemically complex digestates [1]. These include wastewater treatment plant sludge, paper mill sludge, organic fraction of municipal solid waste, industrial wastewater and waste streams from the food and pharmaceutical industries, which can undergo microbial metabolic pathways via anaerobic digestion (AD) to produce biogas [2]. In addition, digestate is readily available and exceptionally rich in macro-and micronutrients, propelling its usability for agricultural applications such as NPK fertilizer.…”

Section: Introductionmentioning

confidence: 99%

“…Also, ammonia and free phosphorus, which have been freed from their biologically bound states in feedstock, have the potential to be recycled back into the food chain for agricultural farming. However, AD has many reported setbacks [1][2][3], which warrants trace-element involvement in order to propel its complex reactions and mechanisms in bioenergy production.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production

2021

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Digestate is characterized by high water content, and in the water and wastewater treatment settings, necessitates both large storage capacities and a high cost of disposal. By seeding digestate with four magnetic nanoparticles (MNPs), this study aimed to recover biogas and boost its methane potential anaerobically. This was carried out via biochemical methane potential (BMP) tests with five 1 L bioreactors, with a working volume of 80% and 20% head space. These were operated under anaerobic conditions at a temperature 40 °C for a 30 d incubation period. The SEM/EDX results revealed that the morphological surface area of the digestate with the MNPs increased as compared to its raw state. Comparatively, the degree of degradation of the bioreactors with MNPs resulted in over 75% decontamination (COD, color, and turbidity) as compared to the control system result of 60% without MNPs. The highest biogas production (400 mL/day) and methane yield (100% CH4) was attained with 2 g of Fe2O4-TiO2 MNPs as compared to the control biogas production (350 mL/day) and methane yield (65% CH4). Economically, the highest energy balance achieved was estimated as 320.49 ZAR/kWh, or 22.89 USD/kWh in annual energy savings for this same system. These findings demonstrate that digestate seeded with MNPs has great potential to improve decontamination efficiency, biogas production and circular economy in wastewater management.

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Section: Digestate Degradation and Biogas Productionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production

2021

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“…Trace elements as micronutrients have been added to AD systems to provide more suitable circumstances for the microorganisms present in the digester (Abdelwahab et al, 2020a). Co has been found to be a signi cant trace mineral addition for the development of methanogenic bacteria throughout the AD process (Ajay et al, 2020). Co is required for methanogenic bacteria to degrade methanol (as a protein cofactor of vitamin) (Roussel et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Cobalt nanoparticles to enhance anaerobic digestion of cow dung: focusing on kinetic models for biogas yield and effluent utilization

Abdelwahab

Mohanty

Sahoo

et al. 2021

Biomass Conv. Bioref.

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The impacts of Co nanoparticles (NPs) on the anaerobic digestion (AD) of cow dung were investigated using kinetic models (modi ed Gompertze, logistic, and rst-order) and experimental measurements. The deviation between the predicted and measured data for biogas yield with modi ed Gompertze and logistic models were (0.66%-2.26%) and (1.43%-4.19%), respectively. The addition of Co NPs (1-3 mg/L) improved the hydrolysis rate (K) value by (66.66%-144%) compared with the control. Furthermore, e uent with Co NPs showed remarkable fertility (4.63%-5.32%). The combination of kinetic models and experimental measurements can effectively quantify the impact of Co NPs on AD performance and provide an informed choice for industrial production. HighlightsIntroduction of Co NPs (1-2 mg/L) can improve biogas production by 6.82%-14.81%.Three kinetic models (modi ed Gompertze, logistic, and rst-order) are employed to predict biogas yield and hydrolysis rate.Predicted data (0.66%-2.26%) of modi ed Gompertze model is closer to measured data than logistic model.First-order model tting proves Co NPs improve the hydrolysis rate (K) value by (66.66%-144%).The selected kinetic models t well with the experimental data (R 2 >0.98).

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“…However, the burning of fossil fuels has led to the increase in the amount of greenhouse gas (majorly CO 2 and NOx) in the atmosphere. Also, these gases have a negative consequence in the public, environmental and ecological health [2]. Reduction in the volume of these dangerous gases to the atmosphere calls for a clean and sustainable energy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rice-Bran Pretreatment in Biohydrogen Production

Dada

Alade

Adeniji

et al. 2021

CJAST

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This study investigated the effect of different pretreatment methods on sugar liberation from Rice bran (RB) and Deoiled Rice bran (DRB). An amount of 100 g of RB or DRB were soaked in 1% (w/v) trichloroacetic acid (99.0 % stock concentration) separately and each mixture was made up to 1L with distilled water to generate the Acid treated RB hydrolysate (ARB) and acid treated DRB hydrolysate. RB and DRB were also subjected to a combined treatment of acid, hydrothermal (boiling) and enzyme treatments to investigate the effects of the combination of the three different methods. Sugar compositions of pretreated samples were determined using high-performance liquid chromatography. It was that there was an increment of more than 400 % and 300 % respectively in the concentration of sugar obtained from acid treated RB and DRB hydrolysates over the untreated RB and DRB hydrolysates. In combined treatment, RB hydrolysates showed an increment of 584% in the amount of total sugar released as well as 500 % increment in DRB hydrolysates. The amount of sugar liberated from DRB hydrolysates is slightly more than the respective RB hydrolysates subjected to same treatment. The increase in the amount of rice bran hydrolysates produced demonstrated that pretreatment of Rice bran with acid, boiling and via enzymatic reactions can increase the amount of biohydrogen produced.

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Review of impact of nanoparticle additives on anaerobic digestion and methane generation

Cited by 102 publications

References 89 publications

Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production

Synergistic Effects of Magnetic Nanomaterials on Post-Digestate for Biogas Production

Cobalt nanoparticles to enhance anaerobic digestion of cow dung: focusing on kinetic models for biogas yield and effluent utilization

Effect of Rice-Bran Pretreatment in Biohydrogen Production

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