Micro and macroalgal biomass: A renewable source for bioethanol

John, Rojan P.; Anisha, G.S.; Nampoothiri, K. Madhavan; Pandey, Ashok

doi:10.1016/j.biortech.2010.06.139

Cited by 963 publications

(412 citation statements)

References 54 publications

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“…Microalgae represent rare group of microorganisms that can easily adapt to almost all ecological habitats, with autotrophic, heterotrophic or mixotrophic behavior (John et al 2011). Autotrophic microalgae can fix carbon dioxide present in the atmosphere in the presence of sunlight through the process of photosynthesis, whereas heterotrophs can utilize organic carbon present in environment for the synthesis of their building blocks.…”

Section: Introductionmentioning

confidence: 99%

Influence of varying nitrogen levels on lipid accumulation in Chlorella sp.

Kiran

Pathak

Kumar

et al. 2016

Int. J. Environ. Sci. Technol.

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Microalgal lipids can be enhanced through varying nitrogen (N) content, and limited supply of nitrogen source seems to be valuable approach for increased lipid accumulation in microalgae. In this study, Chlorella sp. IM-02 was observed under fluorescence microscope for increased number of lipid bodies under nitrogen scarcity. Fourier transform infrared spectroscopy was used to determine spectral changes due to varying lipid content under nitrogen-starved (N 0 , without sodium nitrate), nitrogen-limited (N 0.1 , N 0.25 , N 0.5 and N 1.0 representing 0.1, 0.25, 0.5 and 1.0 g/L of sodium nitrate, respectively) and nitrogen-sufficient (N 1.5 , i.e., 1.5 g/L sodium nitrate) setting. Chlorophyll content was also monitored under these conditions as growth indicator. Various biochemical components viz. total carbohydrates, total proteins and total lipids were also estimated under varying nitrogen levels spectrophotometrically. On fourth day itself, maximum lipid productivity was observed in case of N 0.5 , which is having one-third of nitrogen concentration present in original growth media, BG-11. This concludes N 0.5 as suitable nitrogen provision for better production of lipids in Chlorella sp. IM-02 without much compromising the biomass production as both growth and lipid quantity are key parameters affecting the lipid productivity of any microalgal strain.

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Section: Introductionmentioning

confidence: 99%

Influence of varying nitrogen levels on lipid accumulation in Chlorella sp.

Kiran

Pathak

Kumar

et al. 2016

Int. J. Environ. Sci. Technol.

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“…Porphridium cruentum is unicellular marine red micro algal (Rhodophyta) species (21). In P. cruentum, the presence of starch, carbohydrates and sugar monomers (glucose, xylose, methyl glucaronic acid) of polysaccharides makes it a potential carbon source (22) and the biomass consists of 32% (w/w) available carbohydrates and 34% (w/w) crude proteins (23). This showed that it could be a potent agent for removal of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium, kinetic and thermodynamic biosorption studies of Hg(II) on red algal biomass ofPorphyridium cruentum

Zaib

Athar

Saeed

et al. 2016

Green Chemistry Letters and Reviews

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Among a variety of microbial materials employed for biosorption, algae have added advantages of non-toxic and autotrophic nature. In this study, biosorption of Hg(II) was studied with red algal biomass of Porphyridium cruentum. The parameters affecting biosorption such as dosage of biosorbent, pH, contact time, initial metal concentration, temperature and effect of foreign metal cations in binary system were evaluated. Kinetic data were described with the help of pseudofirst-order and pseudo-second-order kinetic models. Langmuir, Freundlich, Temkin and DubininRadushkevich isotherm models were applied to adsorption equilibrium data. According to the results, the maximum removal capacity (q max ) was 2.62 mg/g observed at pH 7 with 0.25 g/L of biosorbent dosage for Hg(II) solution containing 10 mg/L of metal ions. The Langmuir isotherm model fits best to the adsorption data while the kinetic data followed the pseudo-second-order model. Thermodynamics studies showed that the biosorption process of Hg(II) on P. cruentum was exothermic in nature.ARTICLE HISTORY

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“…Autotrophic algae harness sunlight and fix atmospheric CO2 into carbohydrates such as starch and cellulose via photosynthesis. On the other hand, heterotrophic algae species can utilize small organic carbon compounds that are turned into lipids, protein, and oils (John et al, 2011). Conversely, macroalgae are large multicellular marine algae obtained from natural and cultivated resources.…”

Section: Bioethanol From Algal Biomassmentioning

confidence: 99%