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Showing papers on "Chlorococcum published in 2013"


Journal ArticleDOI
TL;DR: Ten microalgal strains found in fresh and saline waters were cultured, and used to conduct batch experiments in order to evaluate their potential contribution to nutrient removal and biofuel production, and the growth rate of microalgae was inversely analogous to their initial concentration.

116 citations


Journal ArticleDOI
TL;DR: Five indigenous microalgal strains of Scenedesmus, Chlorococcum, Coelastrum, and Ankistrodesmus genera, isolated from Indian fresh water habitats, were studied for carbon-dioxide tolerance and its effect on growth, lipid and fatty acid profile.

75 citations


Journal Article
TL;DR: Algae biofuel have emerged as viable renewable energy sources and are the potential alternatives to fossil-based fuels in recent times and chlorococcum sp.
Abstract: Algae biofuel have emerged as viable renewable energy sources and are the potential alternatives to fossil-based fuels in recent times. Algae have the potential to generate significant quantities of commercially viable biofuel apart from treating wastewater. Three algal species, viz. Chlorococcum sp., Microcystis sp. and Phormidium sp. proliferating in wastewater ponds were isolated and cultured in the laboratory myxotrophically under similar wastewater conditions. Chlorococcum sp. attained a mean biomass productivity of 0.09 g. I(-1)d(-1) with the maximum `biomass density of 1.33 g I-1 and comparatively higher lipid content of 30.55% (w/w) on the ninth day of the culture experiment. Under similar conditions Microcystis sp. and Phormidium sp. attained mean biomass productivities of 0.058 and 0.063 g I-1 d(-1) with a total lipid content of 8.88% and 18.66% respectively. Biochemical composition (carbohydrates, proteins, lipids and phosphates) variations and lipid accumulation studies were performed by comparison of the ratios of carbohydrate to protein; lipid to protein (L/P) and lipid to phosphates using attenuated total reflectance-Fourier transform infrared spectroscopy which showed higher L/P ratio during the stationary phase of algal growth. Composition analysis of fatty acid methyl ester has been performed using gas chromatography and mass spectrometry. Chlorococcum sp. with higher productivity and faster growth rate has higher lipid content with about 67% of saturated fatty acid dominated by palmitate (36.3%) followed by an unsaturate as linoleate (14%) and has proved to be an economical and viable feedstock for biofuel production compared to the other wastewater-grown species.

58 citations


Journal ArticleDOI
TL;DR: The results illustrate the significance of glucose supplemented condition as a promising strategy for generating high value biodiesel from algae.
Abstract: The objective of this study was to identify the most promising nutritional mode of growth for enhanced biomass and lipid productivity in a set of twenty microalgal strains, grown under photoautotrophic and mixotrophic/heterotrophic conditions using 2% glucose as carbon source. These included four cyanobacterial strains (Cyanosarcina, Phormidium, Nostoc and Anabaena) and sixteen green algae belonging to six genera (five strains each of Chlorella and Chlorococcum, two of Scenedesmus and one each of Chlamydomonas, Kirchneria, Bracteacoccus and Ulothrix). Lipid productivity ranged from 2-13% under photoautotrophic conditions, 1.7-32% under mixotrophic conditions and 0.9-20% under heterotrophic conditions. MIC-G5 Chlorella sp. followed by MIC-G11 Chlorella sp. exhibited the highest cellular lipid content (355 and 271 μg/ml) and lipid productivity of 32% and 28% respectively in mixotrophic condition. In the glucose supplemented conditions (heterotrophic), a significant reduction in PUFA from 25.1 to 9.4, 29.2 to 12.4 and 44.7 to 10.2 was observed in MIC-G4, MIC-G5 and MIC-G11, respectively. A remarkable enhancement of 33-70% in SFA was recorded under mixotrophic conditions. As the quality of biodiesel is based on high SFA and low PUFA, our results illustrate the significance of glucose supplemented condition as a promising strategy for generating high value biodiesel from algae.

48 citations


01 Jan 2013
TL;DR: In this article, the toxic effects of herbicide paraquat (1,1′-dimethyl-4,4′-bipyridinium dichlorine) on the algal ecosystem were assessed.
Abstract: To assess the toxic effects of herbicide paraquat (1,1′-dimethyl-4,4′-bipyridinium dichlorine) on the algal ecosystem, the growths of four cyanobacterial strains (Microcystis aeruginosa XW01, M. aeruginosa PCC7806, Merismopedia sp., and Synechocystis PCC6803) and two green alga strains (Chlorella pyrenoidosa, Chlorococcum sp.472) were measured with different concentrations of paraquat. The Median Effect Concentration (EC50), Lowest Observable Effective Concentration (LOEC), No Observable Effective Concentration (NOEC) and Chronic Value (ChV) of paraquat to the six strains were calculated. The experimental results showed that cyanobacteria were more sensitive than green algae to paraquat, and 96 h-EC50 value of C. pyrenoidosa was 7.4 times higher than the value of M. aeruginosa XW01. Longer exposure time displayed higher toxicity.

3 citations


01 Jan 2013
TL;DR: In this article, the microalgae potential of Chlorococcum vitiosum was studied in treating the dye industry wastewater and the results obtained showed promising potential for treatment of industrial effluents with micro algae.
Abstract: The microalgae potential of Chlorococcum vitiosum was studied in treating the dye industry wastewater. The results obtained showed promising potential for treatment of industrial effluents with microalgae. Significant pH reduction and 23.23% reduction in turbidity was obtained. COD of the wastewater was reduced by 13% while

3 citations


Journal Article
TL;DR: It is shown that microalgae Chlorococcum alkaliphilus MC-1 can adapt to the cultivation with flue gas, and it is feasible to enlarge the outdoor cultivation of MC- 1 for lipid production coupling with emissions reduction of flueGas.

3 citations


01 Jan 2013
TL;DR: CO2 sequesting algae identified as Chlorococcum sp was isolated from environment for fatty acid production and flue gas from refinery with 10-15 % CO2 has been studied for CO2 sequestration in photobioreactor.
Abstract: India over 80% of its energy needs are met through fossil fuels. India experienced dramatic growth in fossil fuel fed CO2 emissions averaging to 5.7% per year and becoming world third largest fossil fuel emitting country. Microalgae are capable of capturing green house gas- CO2 and converting to fatty acid. CO2 sequesting algae identified as Chlorococcum sp was isolated from environment for fatty acid production. Flue gas from refinery with 10-15 % CO2 has been studied for CO2 sequestration in photobioreactor. The biomass and lipid productivity for Chlorococcum sp. with 0.1% of CO2 from flue gas were 139 mg/l/d and 81.2 mg/l/d respectively in photobioreactor.

1 citations