Economic evaluation of domestic biowaste to ethanol via a fluidized bed gasifier

Gwak, In Seop; Hwang, Jong Ha; Sohn, Jung Min; Lee, See Hoon

doi:10.1016/j.jiec.2016.12.010

Cited by 19 publications

(3 citation statements)

References 15 publications

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“…The material sorting process revealed the efficiency of this bio-waste to biobased ethanol waste management scheme regarding the purity level of the incoming material which was almost 100% w/w (99.99% w/w). This is a significant characteristic of the proposed waste collection process, since based on Sotiropoulos et al (2016) most of the bio-waste collection schemes in most of the cases have shown not only lower purity levels but also significant variation which varies between starts from 95% w/w and to 99% w/w (Favoino 2003;Gibbs and Hogg 2007).…”

Section: Resultsmentioning

confidence: 99%

Results on the implementation of an innovative dehydrated biological waste to ethanol management scheme

Sotiropoulos

Xydis

Kontogianni

et al. 2018

Int. J. Environ. Sci. Technol.

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Section: Resultsmentioning

confidence: 99%

Results on the implementation of an innovative dehydrated biological waste to ethanol management scheme

Sotiropoulos

Xydis

Kontogianni

et al. 2018

Int. J. Environ. Sci. Technol.

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“…It is the ratio that produces NPV = 0 in a given period [28]. In addition, the payback period in the capital budget refers to the time required to recover the investment funds or reach the break-even point [29].…”

Section: Economic Analysismentioning

confidence: 99%

Economic Evaluation and Risk Premium Estimation of Rainfed Soybean under Various Planting Practices in a Semi-Humid Drought-Prone Region of Northwest China

Liao,

Pei,

Bai

et al. 2023

Agronomy

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Economic benefits and risk premiums significantly affect the production system decision making of farmers and government departments. This study evaluated the economic feasibility and estimated the risk premium of 12 rainfed soybean production systems with various planting densities, fertilization rates and planting patterns by considering the impact of soybean price fluctuation. There were two planting densities (D1: 160,000 plants ha−1 and D2: 320,000 plants ha−1), two fertilization rates (F1: 20 kg ha−1 N, 30 kg ha−1 P, 30 kg ha−1 K; F2: 40 kg ha−1 N, 60 kg ha−1 P, 60 kg ha−1 K) and three planting patterns (F+W0: flat cultivation with no irrigation; R+W0: plastic-mulched ridge-furrow cultivation (PMRF) with no irrigation; R+W1: PMRF with supplemental irrigation of 30 mm at the pod-filling stage). Based on the two-year (2019–2020) field data in a semi-humid drought-prone region of northwest China and soybean price fluctuation from January 2014 to June 2021, the net income (NI) was calculated by considering the impact of soybean price fluctuation and assuming constant soybean production costs. The net present value (NPV) method and the stochastic efficiency with respect to a function (SERF) method were used to evaluate the profitability of protective alternatives and the risk of these alternatives. The results showed that the 12 proposed soybean production systems were economically feasible. Reducing the fertilization rate reduced the input costs, but it did not necessarily result in a decrease in soybean yield and NI. The payback period of all production systems was within two years for farmers investing through loans. High-fertilizer and high-density production systems made personal investment obtain the highest economic benefit in this study, which was not the best investment strategy from the perspective of production-to-investment ratio and environmental protection departments. The preferences of farmers with various risk aversion and environmental protection departments in terms of risk premium were also proposed. The economic and risk assessment framework of this study can enhance the understanding of the adjustment of production systems from different perspectives, and provide strategies for promoting the protection of economic, environmental and socially sustainable agricultural systems.

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“…A fluidized bed with smooth mixing of solid particles and good heat transfer characteristics has been utilized in various thermochemical processes so far [13][14][15][16]. A fluidized bed process is being actively studied for integration with solar energy, and solid particles are used as a carrier or storage medium for heat energy [2,17].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the solar thermal storage of fluidized bed materials for hybrid solar thermo-chemical processes

Seo

Ahn

et al. 2022

Biomass Conv. Bioref.

Self Cite

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The use of solid particles as a solar energy transport and storage medium overcomes the intermittency issues for solar energy and is advantageous for the development of a hybrid process that integrates biomass and solar thermal energy. In this study, lab-scale experimental equipment consisted of bubbling fluidized bed (55mm I.D. and 200mm height) with direct irradiated solar thermal storage was designed and constructed. Sand, alumina (Al), and silica carbide (SiC) particles with 3 different particle sizes (130µm, 250µm, and 370µm) were used as a solar thermal storage medium in the fluidized bed. Due to higher absorption and emissivity properties, the solar thermal efficiency of SiC was higher than those of sand and Al. As the gas velocities in the bubbling fluidized bed increased from the initial minimum fluidization velocity (Umf) to 2 Umf, the temperature differences between upper bed and lower bed decreased from 470 o C to 35 o C because of vigorous solid mixing and heat transfer. Also, the increase of average particle size resulted in the decrease of solid heat storage and the increase of gas heat storage due to the differences of specific surface area and gas velocity. Therefore, the energy transported and stored according to the size of silicon carbide was the highest at 370 µm, and the receiver efficiency was 21.38%.

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Economic evaluation of domestic biowaste to ethanol via a fluidized bed gasifier

Cited by 19 publications

References 15 publications

Results on the implementation of an innovative dehydrated biological waste to ethanol management scheme

Results on the implementation of an innovative dehydrated biological waste to ethanol management scheme

Economic Evaluation and Risk Premium Estimation of Rainfed Soybean under Various Planting Practices in a Semi-Humid Drought-Prone Region of Northwest China

Evaluation of the solar thermal storage of fluidized bed materials for hybrid solar thermo-chemical processes

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