Innovative nanocomposite formulations for enhancing biogas and biofertilizers production from anaerobic digestion of organic waste

Hassaneen, Fatma Y.; Abdallah, Muhammed S.; Ahmed, Nashaat; Taha, Manar M.; ElAziz, Shereen Mohamed. M. Abd; El‐Mokhtar, Mohamed A.; Badary, Mohamed S.; Allam, Nageh K.

doi:10.1016/j.biortech.2020.123350

Cited by 33 publications

(9 citation statements)

References 35 publications

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“…SEM image, 1 s core-level XPS spectrum, TEM image, FTIR, and Raman spectra of C 76 particles are reported in our previous paper 24 . According to Kawada et al 50 , 51 , the XRD pattern of C 76 , after toluene removal, showed monoclinic FCC structure.…”

Section: Resultsmentioning

confidence: 91%

Tungsten oxide/fullerene-based nanocomposites as electrocatalysts and parasitic reactions inhibitors for VO2+/VO2+ in mixed-acids

Diwany

Najjar

Allam

et al. 2022

Sci Rep

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The relatively high cost of all-vanadium redox flow batteries (VRFBs) limits their widespread deployment. Enhancing the kinetics of the electrochemical reactions is needed to increase the power density and energy efficiency of the VRFB, and hence decrease the kWh cost of VRFBs. In this work, hydrothermally synthesized hydrated tungsten oxide (HWO) nanoparticles, C76, and C76/HWO were deposited on carbon cloth electrodes and tested as electrocatalysts for the VO2+/VO2+ redox reactions. Field Emission Scanning Electron Microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscope (HR-TEM,), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and contact angle measurements were used to characterize the electrodes’ material. The addition of the C76 fullerene to HWO was found to boost the electrode kinetics towards the VO2+/VO2+ redox reaction, by enhancing the conductivity and providing oxygenated functional groups at its surface. A composite of HWO/C76 (50 wt% C76) was found to be the optimum for the VO2+/VO2+ reaction, showing a ΔEp of 176 mV, compared to 365 mV in the case of untreated carbon cloth (UCC). Besides, HWO/C76 composites showed a significant inhibition effect for the parasitic chlorine evolution reaction due to the W-OH functional groups.

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Section: Resultsmentioning

confidence: 91%

Tungsten oxide/fullerene-based nanocomposites as electrocatalysts and parasitic reactions inhibitors for VO2+/VO2+ in mixed-acids

Diwany

Najjar

Allam

et al. 2022

Sci Rep

Self Cite

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“…Fe 2+ ions through Fe–S precipitation also pave the route for H 2 S mitigation. Methylotrophic, hydrogenotrophic, and acetoclastic are the three pathways of methane production during AD, and enzymes catalyzed in each step have specific metal requirements [ 182 ]. Hence, it is proposed to develop nano-elemental formulations to fulfill such requirements of participating enzymes in all three production pathways and optimize the methanogenic activity for improved methane production.…”

Section: Solutionsmentioning

confidence: 99%

“…An increase in ~1.16% N and ~3.63% K was also noticed in recovered digestate (treated with FeNPs) as compared to control, though the P content was 0.94% less in treated digestate. Hassaneen et al [ 182 ] recovered nutrient-enriched digestate from the AD of NP-treated (zinc ferrite, average crystallite size 6.22 nm) CM. Interestingly, the recovered digestate (HRT-50 days) has higher P content (3.50%) along with N and K content of 3.40% and 1.30% respectively.…”

Section: Review Of Commercial Viability and Economic Estimatesmentioning

confidence: 99%

Overview on agricultural potentials of biogas slurry (BGS): applications, challenges, and solutions

Kumar

Verma

Sharma

et al. 2022

Biomass Conv. Bioref.

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Graphical abstract The residual slurry obtained from the anaerobic digestion (AD) of biogas feed substrates such as livestock dung is known as BGS. BGS is a rich source of nutrients and bioactive compounds having an important role in establishing diverse microbial communities, accelerating nutrient use efficiency, and promoting overall soil and plant health management. However, challenges such as lower C/N transformation rates, ammonia volatilization, high pH, and bulkiness limit their extensive applications. Here we review the strategies of BGS valorization through microbial and organomineral amendments. Such cohesive approaches can serve dual purposes viz. green organic inputs for sustainable agriculture practices and value addition of biomass waste. The literature survey has been conducted to identify the knowledge gaps and critically analyze the latest technological interventions to upgrade the BGS for potential applications in agriculture fields. The major points are as follows: (1) Bio/nanotechnology-inspired approaches could serve as a constructive platform for integrating BGS with other organic materials to exploit microbial diversity dynamics through multi-substrate interactions. (2) Advancements in next-generation sequencing (NGS) pave an ideal pathway to study the complex microflora and translate the potential information into bioprospecting of BGS to ameliorate existing bio-fertilizer formulations. (3) Nanoparticles (NPs) have the potential to establish a link between syntrophic bacteria and methanogens through direct interspecies electron transfer and thereby contribute towards improved efficiency of AD. (4) Developments in techniques of nutrient recovery from the BGS facilities’ negative GHGs emissions and energy-efficient models for nitrogen removal. (5) Possibilities of formulating low-cost substrates for mass-multiplication of beneficial microbes, bioprospecting of such microbes to produce bioactive compounds of anti-phytopathogenic activities, and developing BGS-inspired biofertilizer formulations integrating NPs, microbial inoculants, and deoiled seed cakes have been examined.

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“…distributed across support materials to enhance the proportion of NPs with surface-exposed atoms which boost reactivity owing to their intended dispersion over the support surface. Hassaneen et al [70] designed and synthesized zinc ferrite (ZnFe), ZnFe with 10% carbon nanotubes (ZFCNTs) and zinc ferrite with 10% C76 fullerene (ZFC76) as nanocomposite material to enhance methane production from organic waste. The maximum methane enhancement was observed in ZnFe, which endorsed methane generation to 185.3%.…”

Section: Nanocomposite Materialsmentioning

confidence: 99%

Recent Advances and Perspectives of Nanotechnology in Anaerobic Digestion: A New Paradigm towards Sludge Biodegradability

Banu

Sharmila²

2022

Sustainability

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Anaerobic digestion (AD) is the strategy of producing environmentally sustainable bioenergy from waste-activated sludge (WAS), but its efficiency was hindered by low biodegradability. Hence, the usage of nanomaterials was found to be essential in enhancing the degradability of sludge due to its nanostructure with specific physiochemical properties. The application of nanomaterials in sludge digestion was thoroughly reviewed. This review focused on the impact of nanomaterials such as metallic nanoparticles, metal oxide nanoparticles, carbon-based nanomaterials, and nanocomposite materials in AD enhancement, along with the pros and cons. Most of the studies detailed that the addition of an adequate dosage of nanomaterial has a good effect on microbial activity. The environmental and economic impact of the AD enhancement process is also detailed, but there are still many existing challenges when it comes to designing an efficient, cost-effective AD digester. Hence, proper investigation is highly necessary to assess the potency of utilizing the nanomaterials in enhancing AD under various conditions.

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Innovative nanocomposite formulations for enhancing biogas and biofertilizers production from anaerobic digestion of organic waste

Cited by 33 publications

References 35 publications

Tungsten oxide/fullerene-based nanocomposites as electrocatalysts and parasitic reactions inhibitors for VO2+/VO2+ in mixed-acids

Tungsten oxide/fullerene-based nanocomposites as electrocatalysts and parasitic reactions inhibitors for VO2+/VO2+ in mixed-acids

Overview on agricultural potentials of biogas slurry (BGS): applications, challenges, and solutions

Recent Advances and Perspectives of Nanotechnology in Anaerobic Digestion: A New Paradigm towards Sludge Biodegradability

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