Photobiostimulation of anaerobic digestion by laser irradiation and photocatalytic effects of trace metals and nanomaterials on biogas production

Abdelsalam, E.; Elhussein, Ahmed; Samer, Mohamed

doi:10.1002/er.5817

Cited by 18 publications

(11 citation statements)

References 125 publications

(248 reference statements)

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“…In the present study, it was found that increased the air in the cathode chamber increases its solubility and consequently the availability of oxygen which agrees with the statements of Fornero et al [26] and Hussein [27]. Future research will focus on the implementation of laser radiation as well as trace metals, in form of nanomaterials, to enhance the performance of microbial fuel cells, where the laser radiation and nanotechnology were implemented in biogas and biohydrogen production [28][29][30][31][32][33][34][35][36] but a very few studies in microbial fuel cells were conducted.…”

Section: Without Oxygen Supply (Without Air Pump)supporting

confidence: 89%

Enhancing the performance of microbial fuel cells by installing an air pump to the cathode chamber

Amer¹,

Abdelsalam

Attia

et al. 2021

Egypt. J. Chem.

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The microbial fuel cells (MFCs) are biochemical devices in which bacteria create electrical power by oxidizing simple compounds such as glucose as well as complex organic matter in wastewater. In this study, pumping air into the cathode chamber and its effect on microbial fuel cell performance was investigated. The metabolism of bacteria existed in wastewater was responsible for the generation of bioelectricity. The developed MFC system was designed by utilizing phosphate buffer to operate the system at controlled pH equal 7 and at a stable temperature of 30 o C. It was found that increasing oxygen supply to the cathode chamber has a positive effect on the cell performance by increasing the voltage value. Generally, the efficiency of microbial fuel cell was enhanced in the case of cathodic chamber aeration in comparison to the case of no aeration was applied. It was found that the voltage increased in the case of oxygen supply to reach 0.45 mv with a stability over the 138 h of the experiment compared to the case of no aeration was applied where the voltage reached only 0.2 mV with stability in one case and 0.4 mV after 78 h of operation with instability in the second case. Therefore, the performance of the microbial fuel cell improved. It can be concluded that oxygen concentration affects both reaction kinetics and final power efficiency.

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Section: Without Oxygen Supply (Without Air Pump)supporting

confidence: 89%

Enhancing the performance of microbial fuel cells by installing an air pump to the cathode chamber

Amer¹,

Abdelsalam

Attia

et al. 2021

Egypt. J. Chem.

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“…Ra et al [18] reported that the photobiostimulation of green algae using green LEDs was not effective for biodiesel production because the green light was reflected, therefore the green microalgae was not absorbed the green light. Future research will focus on the photobiostimulation of algae using laser radiation, where this laser radiation was implemented in biogas production [28][29][30][31][32] but not yet in biodiesel production.…”

Section: Discussionmentioning

confidence: 99%

Photobiostimulation of Chlorella sorokiniana using light emitting diodes (LEDs) for increasing lipid and biodiesel production

et al. 2021

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At present, the major body of research is focused on weaning the world from fossil fuels. The problem is that the world is running out of fossil fuel. Therefore, an alternative source must be identified. The biofuels are promising alternatives. In the case of petrodiesel, a promising alternative is biodiesel production from algae. The ability of microalgae to generate large quantities of lipids with a fast growth rate made them superior biodiesel producers. Using light-emitting diodes (LEDs) as an energy source in microalgal cultivation was recently increased owing to its large spectrum, endurance, and low-energy utilization. Changes in cultivation conditions, limited capabilities of harvesting light, and self-shading of microalgae were the most important problems. Therefore, the photobiostimulation of algae using LEDs radiation led to an increase in algal growth rate which results in increased lipid production. This research investigated the influence of monochromatic LEDs on the growth of Chlorella sorokiniana microalga. At the first phase, microalgae growth and algal biomass significantly increased under red LEDs [2.3 g/L], blue LEDs [1.8 g/L], green LEDs [0.7 g/L], and white LEDs (0.6) g/L as a control, respectively. At the second phase, microalgal growth and algal biomass significantly increased under red LEDs [2.9 g/L], blue LEDs 2.3 g/L, and white LEDs (1.5) g/L as a control, respectively. The percentage of extracted oil (%) or the yield of extracted oil of microalgae was 10.38 % (white LEDs), 16.94 % (blue LEDs), and 15.55 % (red LEDs) respectively. It was concluded that the photobiostimulation of algae using LEDs led to the enhanced weight of algal biomass, therefore increased of lipids and biodiesel production. The red LEDs were the best one in terms of increasing the weight of algal biomass. The blue LEDs were the best one in terms of increasing the percentage of extracted oil. However, the green LEDs were not effective.

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“…The addition of trace elements/mineral accelerants during AD was also reported to improve fertilization values of recovered digestate, as observed by Xu et al [ 134 ] in the case of vermiculite addition (as mineral accelerant). The biostimulation (BSM) of methanogens during AD through laser irradiation (LR) has also been described to enhance the microbial actions, and in the latest developments the LR is coupled with NP treatment for improving the biogas production [ 149 , 150 ] and LCA assessment performed by Samer et al [ 150 ] asserted that the application of LR with NPs for BSM during AD have minimal adverse effects on the environment as compared to control.…”

Section: Solutionsmentioning

confidence: 99%

“…Collectively, NP treatment facilitates higher biomethane yields with quality improvements and reduction in HRTs. In recent developments [ 149 , 150 ], biomass material has been treated with laser irradiation coupled with nanoparticles during AD to achieve biostimulation of methanogens for improved biogas production.…”

Section: Summary Perspectives and Conclusionmentioning

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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Photobiostimulation of anaerobic digestion by laser irradiation and photocatalytic effects of trace metals and nanomaterials on biogas production

Cited by 18 publications

References 125 publications

Enhancing the performance of microbial fuel cells by installing an air pump to the cathode chamber

Enhancing the performance of microbial fuel cells by installing an air pump to the cathode chamber

Photobiostimulation of Chlorella sorokiniana using light emitting diodes (LEDs) for increasing lipid and biodiesel production

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

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