A Study of the Validity of Preliminary Feasibility Studies: Focused on General Guidelines

Kim, Tae-yun; Cho, Ye-jin

doi:10.24145/kjpa.56.2.11

Cited by 2 publications

(3 citation statements)

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“…Some biosurfactant optimization studies have found the same trend for nitrogen. [ 16,49,51,52,54,55 ] The impact of carbon/nitrogen ratios were reported in some biosurfactant formation studies [ 44,52,58 ] ; however, it was not significant in this work and other related studies. [ 39,43,54 ]…”

Section: Resultsmentioning

confidence: 75%

“…The same trend has been observed with the carbon source concentration in biosurfactant production studies. [ 16,39,49–55 ] Excessive substrate concentrations (e.g., carbon source) can result in lower pH, while higher concentrations or presence of toxic metabolite products, higher media viscosity, and lower oxygen transfer can result in a decrease in EI.…”

Section: Resultsmentioning

confidence: 99%

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Biosurfactant production by native marine bacteria (Acinetobacter calcoaceticus P1‐1A) using waste carbon sources: Impact of process conditions

2021

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The high cost of biosurfactant production is an obstacle for widespread commercial applications. Cost‐effective generation of biosurfactants could be achieved using industrial wastes and by‐products as substrates and tailoring cultural conditions. In this work, waste streams including refined waste cooking oil and crude glycerol were compared to each other and to commercial carbon sources. Based on this assessment, the waste cooking oil was selected for further studies. A response surface methodology (RSM) was then used to study biosurfactant production by Acinetobacter calcoaceticus P1‐1A strain (a strain indigenous to the North Atlantic Ocean) using the refined waste cooking oil as the sole carbon source. The concentrations of carbon, nitrogen, and NaCl, as well as the initial pH and temperature were varied. The emulsification index was measured as the response. The cultural conditions to reach the maximum emulsification index (68.17%) were 0.0435 v/v (4.35 vol.%) refined waste cooking oil, 6.5 g/L ammonium sulphate, 13.5 g/L NaCl, initial pH of 7.7, and temperature of 34.8°C. The experimental validation of the predicted response under optimum conditions was performed with 862 mg/L of the biosurfactant product generated. The product showed high thermal, pH, and salinity stability. The use of this indigenous bacteria combined with the use of a no‐cost carbon source from waste has the potential to not only reduce costs associated with biosurfactant production but also to produce a biosurfactant better suited to treat oil spills in the harsh environment of the North Atlantic and other cold waters.

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Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Biosurfactant production by native marine bacteria (Acinetobacter calcoaceticus P1‐1A) using waste carbon sources: Impact of process conditions

2021

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“…BCA is usually performed for all public projects, which includes Korean government research and development (R&D) projects, to ensure that there is no waste of the funds the government contributes [35,36]. In particular, a preliminary feasibility study ("Preliminary Feasibility Study for the Government R&D Projects and Fiscal Expenditures") must be submitted according to Article 38 of the National Finance Act [37].…”

Section: Benefit To Cost (B/c) Analysismentioning

confidence: 99%

Importance of Government Roles for Market Expansion of Eco-Village Development Plan Establishment Research: Case Study in the City of Suwon, South Korea

et al. 2020

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Korean governmental ministries are promoting strategic projects to support cost-saving and low-carbon technologies in residential complexes and commercial buildings in the City of Suwon, South Korea. Suwon City will build throughout the city focusing on economic feasibility by selecting performance targets and using applied technologies for locations to be continuously expanded. This case study of Suwon shows that the local Korean government has prepared a project to spread eco-friendly residential complexes and is trying to introduce and realize eco-friendly construction standards proposed by the central Korean government. The central government is working to actively establish a system to promote eco-friendly construction technologies and encourages people to use eco-friendly construction methods and products. To build the demo-complex in the city, the role of the government was re-examined considering the universalization of energy and environmental technology through the analysis of case studies where these technologies were applied to residential complexes. The objectives of this research study are: (1) to establish a land use plan for the eco-village site in the City of Suwon, (2) to establish an external space plan, which includes the environmental aspects, and (3) to have alternative designs through a multi-criteria decision-making process. This study also used a cost-benefit analysis (BCA) to evaluate and ensure that there was no waste of the Korean government budget contribution, and to observe the business feasibility based on economic performance.

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A Study of the Validity of Preliminary Feasibility Studies: Focused on General Guidelines

Cited by 2 publications

References 0 publications

Biosurfactant production by native marine bacteria (Acinetobacter calcoaceticus P1‐1A) using waste carbon sources: Impact of process conditions

Biosurfactant production by native marine bacteria (Acinetobacter calcoaceticus P1‐1A) using waste carbon sources: Impact of process conditions

Importance of Government Roles for Market Expansion of Eco-Village Development Plan Establishment Research: Case Study in the City of Suwon, South Korea

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