Using low-cost porous materials to increase biogas production: A case study in Extremadura (Spain)

Sánchez-Sánchez, Consolación; González-González, A.; Cuadros-Salcedo, Francisco; Cuadros-Blázquez, Francisco

doi:10.1016/j.jclepro.2018.07.079

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…The carbon basically is good for a long run operation while zeolite could give impact in short period of time. It is previously reported that the carbon mobilized media can be used for about 6 months before replacement [7]. It is informed that, carbon addition can enhance the basicity inside the reactor which is good for methanogenic bacteria [7].…”

Section: Resultsmentioning

confidence: 99%

“…It is previously reported that the carbon mobilized media can be used for about 6 months before replacement [7]. It is informed that, carbon addition can enhance the basicity inside the reactor which is good for methanogenic bacteria [7]. However, in a simple anaerobic reactor where the acidogenic and methanogenic process are mixed in the same pot the increase of pH will not affect so much since the acidogenesis prefer in a low pH environment.…”

Section: Resultsmentioning

confidence: 99%

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Preliminary Study of Anaerobic Digestion Improvement by Bacterial Immobilization Media from Activated Carbon and Natural Zeolite

Purnomo¹,

Sari²,

Laoong-u-thai³

et al. 2019

IJCEA

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Immobilization on the solid surface of anaerobic microorganism can improve biogas production. A study on the biogas production and the analysis of biogas-producing bacteria in natural zeolite and activated carbon-based media have been carried out. This research was aimed to find out the effect of solid media addition and to identify the bacteria species involved in biogas production under the anaerobic condition. The bacterial culture was carried out in batch anaerobic digesters for a 35-day incubation period. Three different composition of ring-shaped packing consist of natural zeolite (Z), activated carbon (K), and an equal mixture of natural zeolite and activated carbon (C) were added in an anaerobic reactor. Biogas as the product was analyzed with GC-TCD. Each of the bacteria's DNA in the media then isolated, amplified, and also purified to find out the intensity of each DNA band. Sequencing process was conducted for each purified DNA bacteria and the sequence result then translated by BLASTn program in the gene-bank NCBI. The highest methane concentration of 34.32% was obtained from reactor with natural zeolite media, then the mixed media added reactor provided biogas with 26.31% methane and the last reactor with activated carbon media showed the smallest value of 20.77% of methane. Sequencing result shows that Dictyoglomus thermophilum species was dominated on the surface of K-packing, Rhodopseudomonas palustris species was observed on the C-media, and Thermococcus litoralis was living on Z-media. SEM image was taken to confirm the results of DNA identification.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Preliminary Study of Anaerobic Digestion Improvement by Bacterial Immobilization Media from Activated Carbon and Natural Zeolite

Purnomo¹,

Sari²,

Laoong-u-thai³

et al. 2019

IJCEA

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“…Regardless of the porous material, the pores must be large enough for methanogenic bacteria populations to colonize. Each bacterium is about 1 µm in size, and for that reason, the pore size and distribution, and the way of its usage (as an additive or as a fixed bed) affect the microbial community and AD performance [47]. In addition to the porous structure, other specific properties of used materials (e.g., surface functional groups, existence of metals, specific surface area ion exchange capacity, etc.)…”

Section: Anaerobic Digestionmentioning

confidence: 99%

Effects of Iron, Lime, and Porous Ceramic Powder Additives on Methane Production from Brewer’s Spent Grain in the Anaerobic Digestion Process

2023

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The process of anaerobic digestion used for methane production can be enhanced by dosing various additive materials. The effects of these materials are dependent on various factors, including the processed substrate, process conditions, and the type and amount of the additive material. As part of the study, three different materials—iron powder, lime, and milled porous ceramic—were added to the 30-day anaerobic digestion of the brewer’s spent grain to improve its performance. Different doses ranging from 0.2 to 2.3 gTS × L−1 were tested, and methane production kinetics were determined using the first-order model. The results showed that the methane yield ranged from 281.4 ± 8.0 to 326.1 ± 9.3 mL × gVS−1, while substrate biodegradation ranged from 56.0 ± 1.6 to 68.1 ± 0.7%. The addition of lime reduced the methane yield at almost all doses by −6.7% to −3.3%, while the addition of iron powder increased the methane yield from 0.8% to 9.8%. The addition of ceramic powder resulted in a methane yield change ranging from −2.6% to 4.6%. These findings suggest that the use of additive materials should be approached with caution, as even slight changes in the amount used can impact methane production.

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“…This process generates a solid phase (curd, which is the precursor of cheese) and a liquid phase (whey). Approximately, 9 L of whey (W) is generated per 1 kg of cheese production (Sánchez‐Sánchez et al., 2018). Taking into account the amount of cheese produced worldwide in 2018, the volume of W generated can be estimated around 211 million m 3 .…”

Section: Introductionmentioning

confidence: 99%

Fermentation of whey and its permeate using a genetically modified strain of Escherichia coli K12 MG1655 to produce 2,3‐butanediol

Fernández‐Gutiérrez

Veillette

Ramírez

et al. 2021

Environmental Quality Mgmt

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Whey is generated during cheese manufacturing, and permeate whey is obtained after whey deproteinization. Both effluents contain lactose, which can cause environmental issues if they are released into the environment. The aim of the present study was the valorization of lactose contained in whey and permeate whey via fermentation into 2,3‐butanediol (2,3‐BD) with genetically modified strain of Escherichia coli K12 MG1655. Both effluents were first fermented at various dilution ratios with the culture medium M9 (50:50, 75:25, and 100:0, v/v). The fermentation of undiluted effluents produced the highest 2,3‐BD yield (0.43 g/g lactose) at 72 h. Afterwards, the effects of initial pH, inoculum size and agitation rate on 2,3‐BD yield in flask fermentation of undiluted effluents were studied. The agitation rates of 50 and 200 rpm resulted in lower 2,3‐BD yields compared with 100 rpm (67% lower). The effect of aeration (2.5 vvm) on 2,3‐BD yield was tested in a 2 L bioreactor, where a 2,3‐BD yield of 0.40 g/g lactose was obtained after 24 h. In the present study, it was demonstrated that both whey and permeate whey can be used to produce 2,3‐BD, reaching near 80% of the theoretical yield after 24 h of fermentation.

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Using low-cost porous materials to increase biogas production: A case study in Extremadura (Spain)

Cited by 10 publications

References 35 publications

Preliminary Study of Anaerobic Digestion Improvement by Bacterial Immobilization Media from Activated Carbon and Natural Zeolite

Preliminary Study of Anaerobic Digestion Improvement by Bacterial Immobilization Media from Activated Carbon and Natural Zeolite

Effects of Iron, Lime, and Porous Ceramic Powder Additives on Methane Production from Brewer’s Spent Grain in the Anaerobic Digestion Process

Fermentation of whey and its permeate using a genetically modified strain of Escherichia coli K12 MG1655 to produce 2,3‐butanediol

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