Environmental impacts concerning the addition of trace metals in the process of biogas production from anaerobic digestion of slurry

Hijazi, Omar; Abdelsalam, E.; Samer, Mohamed; Amer, Baher M. A.; Yacoub, I. H.; Moselhy, Mohamed A.; Attia, Yasser A.; Bernhardt, Heinz

doi:10.1016/j.jclepro.2019.118593

Cited by 48 publications

(19 citation statements)

References 30 publications

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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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“…However, the environmental impacts of these additions and then the environmental impacts of laser radiation should be investigated. Hijazi et al 128 investigated the environmental impacts of trace metals addition to substrates and concluded that this process is environmentally friendly. Similarly, Hijazi et al 129 assessed the environmental impacts of nanomaterials addition to substrates, where the results showed that this procedure is environmentally friendly.…”

Section: Discussionmentioning

confidence: 99%

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

2020

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Biogas generation from the latent energy in biomass is one of the most attractive renewable energy sources. This can be attributed to the environmental friendly nature of the process and its less energy requirements. This article reviews the anaerobic digestion of biomass (livestock manure and crop residues) for biogas and methane production as a source of renewable energy. Furthermore, this study investigates the enhancement of biogas and methane production using light and laser radiations. The laser radiation accelerates bacterial division and growth, where this process is termed as "photobiostimulation." Additionally, laser radiation photoactivates the inactive enzymes. The results of this literature review showed that the irradiation of methanogenic bacteria with laser sources increased the biogas production by one and a half fold the traditional method of biogas production. The simultaneous irradiation of both nanomaterials and methanogenic bacteria using laser radiation increased the biogas volume by twofolds the biogas volume resulted from the traditional method of biogas production.

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“…Nutrition balance as one of environmental parameters is of great importance for the microbial growth during AD process (Choong et al, 2016). Besides basic macronutrients such as carbon (C), nitrogen (N), phosphorus (P) and sulphur (S), trace elements (TE) such as nickel (Ni), iron (Fe) and cobalt (Co) play an irreplaceable role in enzymatic synthesis, in respiratory processes, cell structural stability and signal transduction of acidogenesis and methanogenesis (Choong et al, 2016;Eftaxias et al, 2018b;Hijazi et al, 2020;Thanh et al, 2016). In AD process, Fe not only is a component of the majority of metalloenzymes functioning to form the active site, cofactor and the structure itself, but also serves as a redox carrier to transfer electron (Harrop & Mascharak, 2005;Vintiloiu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Hence, adequate trace elements could support the microbial metabolism to maintain an effective AD process. However, one of remarkable characteristics of FW is low trace element, which could rigorously limit its AD (Hijazi et al, 2020;Zhang & Loh, 2019). Therefore, supplementation of trace elements is necessary and promising for e cient biogas production of FW.…”

Section: Introductionmentioning

confidence: 99%

Effect of Iron Supplementation On The Biogas Production and Microbial Community Distribution During Anaerobic Digestion of Food Waste Process

Xu¹,

Zhang²,

Liu³

et al. 2021

Preprint

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Iron as micronutrients is of great significance for forming a stable and efficient anaerobic digestion of food waste. Aim of this study was to examine the effect of iron supplementation on the mesophilic anaerobic digestion of food waste. Firstly, batch experiments were conducted with different iron concentration at a constant kitchen waste/inoculum ratio (K/I = 1.0), which indicated that the effect of iron on anaerobic digestion of was strictly dosage-dependent. Then, anaerobic digestion of food waste was conducted for 50 days in semi-continuous rectors with optimal iron concentration (2.0mg /L) under the same conditions. And the semi-continuous rectors obtained a good operation performance with low volatile fatty acids concentration, higher biogas production, high coenzyme F420 and dehydrogenase concentrations. Furthermore, two samples taken on 7th day and 50th day were analyzed by high-throughput sequencing, which illustrated that the composition anaerobe community was stable. However, the growth and activity of several syntrophic microbial groups (Aminobacterium, Syntrophomonas, Anaerolineaceae, Methanosaeta, Methanosarcina, Methanobacterium and Methanospirillum), were stimulated by iron supplementation. The shift of microbial community suggested that a high-efficiency microbial community for methane production from food waste was formed by iron supplementation.

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Environmental impacts concerning the addition of trace metals in the process of biogas production from anaerobic digestion of slurry

Cited by 48 publications

References 30 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 anaerobic digestion by laser irradiation and photocatalytic effects of trace metals and nanomaterials on biogas production

Effect of Iron Supplementation On The Biogas Production and Microbial Community Distribution During Anaerobic Digestion of Food Waste Process

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