An effective acid catalyst for biodiesel production from impure raw feedstocks

Tran, Hai-Linh; Ryu, Young-Jin; Seong, Dong Ho; Lim, Sang‐Min; Lee, Choul‐Gyun

doi:10.1007/s12257-012-0674-1

Cited by 34 publications

(9 citation statements)

References 20 publications

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“…The filter and cell pellet were then placed in the drying oven and dried to constant weight by heating at 80 °C for 24 hours. The filters were then allowed to cool to room temperature in a desiccator and reweighed, after which the dry weight of the algal biomass was determined gravimetrically as the difference between the weight of the filter before and after use; growth was expressed in terms of dry weight (g/L) 13 .…”

Section: Biomass Estimationmentioning

confidence: 99%

Effects of LED irradiation on the growth and Astaxanthin Production of Haematococcus lacustris

Tran¹,

Lee²,

Hong³

2015

Biosci., Biotechnol. Res. Asia

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Microalgae have long been considered promising microorganisms, due to their potential as a source of valuable pharmaceuticals, pigments, carbohydrates, biofuels, and other fine chemicals. High-density microalgal photobioreactors have been considered for exploiting the biotechnological potential of microalgae. Haematococcus lacustris is considered the richest natural source of astaxanthin for pharmaceutical, nutraceutical, and cosmetic applications. One of key challenges was to provide light sources that are more efficient, to deliver light more efficiently to the microalgal culture. Recent developments in highly efficient light-emitting diodes (LEDs) have made possible the development of LED-based photobioreactors (PBR). We investigated the effects of various LEDs on the growth and astaxanthin production from Haematococcus lacustris. The mixture of red and blue was found to be the most effective light source for growing this microalga. Different wavelength mixing ratios of red and blue were also investigated. The ratio of mixed red-blue of 1:3 showed the best growth and astaxanthin accumulation from Haematococcus lacustris. The maximum biomass and astaxanthin production with illumination by mixed red-blue LEDs at a ratio of 1:3 obtained was 2.3 g/L and 55.1 mg/L, respectively. Biomass and astaxanthin were enhanced by a maximum of 3.28 g/L and 84.12 mg/L, with the mixed red-blue illumination in the ratio 1:3 at high light intensity 160 µE • m-2 • s-1 .

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Section: Biomass Estimationmentioning

confidence: 99%

Effects of LED irradiation on the growth and Astaxanthin Production of Haematococcus lacustris

Tran¹,

Lee²,

Hong³

2015

Biosci., Biotechnol. Res. Asia

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“…Their metabolites have received enormous attention as valuable products as well as precursors for the production of bioenergy [29,30]. Cyanobacteria can provide useful information in regards to organic compound production in eukaryotic microalgae.…”

Section: Response To Proteome Changes At Low Temperaturementioning

confidence: 99%

Proteomic analysis of Synechocystis sp. PCC6803 responses to low-temperature and high light conditions

Hong

Kim

Jang

et al. 2014

Biotechnol Bioproc E

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The global changes in protein expression of Synechocystis sp. PCC6803, a photosynthetic bacterium for the production of secondary metabolites as a green cell factory, were investigated by proteome separation and a subsequent tandem mass spectrometry. Two different proteome separation techniques, strong cation exchange chromatography and off-gel electrophoresis, were applied. The combination of the two proteome separation techniques enabled the comparative analysis of the differential regulation of the Synechocystis proteome in response to two different environmental factors, temperature and light. A total of 1,483 proteins were identified, which represent over 40% of the genes in Synechocystis. Our data showed that fatty acid metabolism was inhibited by (3R)-hydroxymyristol acyl carrier protein dehydrase (Sll1605) under low temperature conditions. The expression of UDP-N-acetylglucosamine acyltransferase (Sll0379) and 3-O- [3-hydroxymyristoyl] glucosamine N-acyltransferase (Slr0776), which is involved in lipopolysaccharide metabolism, was not observed under high light conditions. Under high light exposure, proteins related to iron-sulfur metabolism were detected, which may be responsible for maintaining the redox potential of the photosystem. High light under low temperature caused severe damage to the photosystem. Some of the responses to these stresses were similar to those previously reported for other photosynthetic organisms. Notably, this study revealed the followings: (i) low temperature inhibits fatty acid synthesis; (ii) high light inhibits lipopolysaccharides synthesis and stimulates the expression of iron-sulfur related proteins; and (iii) high light under low temperature induces the photorespiratory cycle. The global proteomic analysis clearly showed that stress conditions such as low temperature and/or high light induce cellular metabolisms related with the protection of their photosystems in the model microalga Synechocystis sp. PCC6803.

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“…The transesterification process can be done in batch or continuous. Transesterification reactions can be done using three kinds of catalyzed so this reaction can be divided as acid catalyzed reactions [11], alkaline catalyzed reactions [12], or enzyme catalyzed reactions [13]. Processes that use enzymes as catalysts require a much longer reaction time than other processes.…”

Section: Introductionmentioning

confidence: 99%

Optimum condition of biodiesel production from waste cooking oil using continuous stirred tank reactor

Astuti¹,

Mufrodi²

2019

IJSGCE

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Energy demand in Indonesia is increasing, but the availability of fossil energy is running low. Therefore the effort to get renewable energy is increasingly encouraged. The most widely alternative energy used in Indonesia is biodiesel. Waste cooking oil is very potential to be utilized as raw material of biodiesel. Currently there are 3.75 million liters of waste cooking oil per year. Waste cooking oil when discharged into the body of water will form a layer so that oxygen is blocked into the water. Utilization of waste cooking oil into biodiesel will reduce the burden of environmental pollution by waste cooking oil. This paper proposes optimum conditions of biodiesel production from waste cooking oil using continuous stirred tank reactor with base catalyst. The research variables are reaction temperature, the mole ratio of waste cooking oil and methanol, and the amount of catalyst. This paper also evaluates the heating value of biodiesel produced from waste cooking oil.

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An effective acid catalyst for biodiesel production from impure raw feedstocks

Cited by 34 publications

References 20 publications

Effects of LED irradiation on the growth and Astaxanthin Production of Haematococcus lacustris

Effects of LED irradiation on the growth and Astaxanthin Production of Haematococcus lacustris

Proteomic analysis of Synechocystis sp. PCC6803 responses to low-temperature and high light conditions

Optimum condition of biodiesel production from waste cooking oil using continuous stirred tank reactor

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