Desulphurisation of Biogas: A Systematic Qualitative and Economic-Based Quantitative Review of Alternative Strategies

Okoro, Oseweuba Valentine; Sun, Zhifa

doi:10.3390/chemengineering3030076

Cited by 66 publications

(52 citation statements)

References 118 publications

(170 reference statements)

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“…Okoro and Sun [4] submitted an interesting review about the current state of biogas desulfurization technologies: physicochemical, biological, in situ, and post-biogas desulfurization strategies. Moreover, a review of the annual operation and annualized capital cost per unit volume was carried out.…”

Section: Brief Overview Of the Contributions To This Special Issuementioning

confidence: 99%

“…This Special Issue contains the invited submissions to a Special Issue of ChemEngineering on the topic "Advanced Biogas Desulfurization" [1][2][3][4][5]. Three research articles [1][2][3] and two reviews [4,5] have been published. Biogas is a renewable energy source produced by the biodegradation of organic matter under anaerobic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Special Issue “Advances in Biogas Desulfurization”

Ramírez

2020

ChemEngineering

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This Special Issue contains three articles and two reviews. The biological reactors used in the studies were fed with real biogas from Landfill or STPs. One research article concerns the use of a pilot scale plant with a combined process with a chemical and biological system. The other two studies concern anoxic biotrickling filters, with one study focused on the study of variable operation and its optimization through the response surface methodology, and the other focused on the selection of packing material. The reviews concern the current state of biogas desulfurization technologies, including an economic analysis, and the microbial ecology in biofiltration units. This Issue highlights some of the most relevant aspects about biogas desulfurization.

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Section: Brief Overview Of the Contributions To This Special Issuementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Special Issue “Advances in Biogas Desulfurization”

Ramírez

2020

ChemEngineering

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“…Similarly, inflationary effects on money value were also considered and incorporated in the economic calculations more so as the purchase cost of the equipment was obtained from different sources with different reference years. The chemical engineering plant cost index (CEPCI) was employed in this regard using Equation 5 [45,46];…”

Section: Economic Performance Measurementioning

confidence: 99%

Circumventing Unintended Impacts of Waste N95 Facemask Generated during the COVID-19 Pandemic: A Conceptual Design Approach

2020

Self Cite

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The global crisis arising from the current COVID-19 pandemic has resulted in a surge in the magnitude of global waste from used Personal Protective Equipment with special emphasis on waste N95 facemask. Creative approaches are therefore required to resolve the surging facemask waste disposal issue in an economical and environmentally friendly manner. In an attempt to resolve the evolving global waste challenge, the present study has assessed the economic and environmental performances of converting N95 facemasks to steam and electricity via a combined heat and power plant, to ethanol via a syngas fermentation process, and to an energy-dense gasoline-like oil product via a hydrothermal liquefaction process. These processes were assessed using “conceptual” process models developed using ASPEN plus as the process simulation tool. Economic and environment assessments were undertaken using net present values (NPVs) and the rate of potential environmental impacts (PEIs) respectively, as sufficient performance measures. Therefore, the present study was able to establish that the conversion of waste N95 facemask to syngas prior to a fermentation process for ethanol production constituted the least economical and least environmental friendly process with a negative NPV and the highest rate of PEI (1.59 PEI/h) value calculated. The NPV values calculated for N95 facemask waste conversion to steam and electricity and energy-dense oil processes were US$ 36.6 × 106 and US$ 53 × 106 respectively, suggesting the preference for the production of a valuable energy-dense oil product. Furthermore, it was observed that when the environmental performance of both processes was considered, rates of PEIs of 1.20 and 0.28 PEI/h were estimated for the energy-dense oil production process and the steam and electricity generation process, respectively. Therefore, the study was able to establish that the utilisation of waste N95 facemask for steam and electricity generation and for generating an energy-dense oil product are both promising approaches that could aid in the resolution of the waste issue if both environmental and economic performances constitute crucial considerations.

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“…H2S is a highly toxic, odorous and corrosive gas that inhibits the biogas formation process [26]. Furthermore, during biogas combustion, H2S is mainly converted to SO2 and further to H2SO4 [31], which is responsible for the acidification of the engine's oil, deposits and harmful gas emissions during combustion [32], and shortens the operating life of the CHP- The NH 3 -N concentration remained below 2 g/L throughout the whole monitoring period and the concentrations of VFAs (acetic-acid, propionic-acid, isobutyric-acid, butyric-acid) were far below the limiting values (e.g., <0.05 g/L for acetic acid), demonstrating the high stability of the process. The stable performance of the biogas plant was also reflected through the FOS/TAC index (0.18 ± 0.03, 95% CI 0.17-0.19), which was below the limiting value range of 0.2-0.3 [9,29].…”

Section: Desulfurizationmentioning

confidence: 99%

Section: Desulfurizationmentioning

confidence: 99%

Performance of a Full-Scale Biogas Plant Operation in Greece and Its Impact on the Circular Economy

Spyridonidis

Vasiliadou

Akratos

et al. 2020

Water

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Biogas plants have been started to expand recently in Greece and their positive contribution to the economy is evident. A typical case study is presented which focuses on the long-term monitoring (lasting for one year) of a 500 kW mesophilic biogas plant consisting of an one-stage digester. The main feedstock used was cow manure, supplemented occasionally with chicken manure, corn silage, wheat/ray silage, glycerine, cheese whey, molasses and olive mill wastewater. The mixture of the feedstocks was adjusted based on their availability, cost and biochemical methane potential. The organic loading rate (OLR) varied at 3.42 ± 0.23 kg COD m−3 day−1 (or 2.74 ± 0.18 kg VS m−3 day−1) and resulted in a stable performance in terms of specific biogas production rate (1.27 ± 0.12 m3 m−3 day−1), biogas yield (0.46 ± 0.05 m3 kg−1 VS, 55 ± 1.3% in methane) and electricity production rate (12687 ± 1140 kWh day−1). There were no problems of foaming, nor was there a need for trace metal addition. The digestate was used by the neighboring farmers who observed an improvement in their crop yield. The profit estimates per feedstock indicate that chicken manure is superior to the other feedstocks, while molasses, silages and glycerin result in less profit due to the long distance of the biogas plant from their production source. Finally, the greenhouse gas emissions due to the digestate storage in the open air seem to be minor (0.81% of the methane consumed).

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Desulphurisation of Biogas: A Systematic Qualitative and Economic-Based Quantitative Review of Alternative Strategies

Cited by 66 publications

References 118 publications

Special Issue “Advances in Biogas Desulfurization”

Special Issue “Advances in Biogas Desulfurization”

Circumventing Unintended Impacts of Waste N95 Facemask Generated during the COVID-19 Pandemic: A Conceptual Design Approach

Performance of a Full-Scale Biogas Plant Operation in Greece and Its Impact on the Circular Economy

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