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Oh, Hee‐Mock; Lee, Seog June; Park, Myung Hwan; Kim, Hee Sik; Kim, Hyoung Chin; Yoon, Jung Hoon; Kwon, Gi-Seok; Yoon, Byung Dae

doi:10.1023/a:1010577319771

Cited by 225 publications

(13 citation statements)

References 16 publications

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“…The most common additives are soluble aluminium or iron salts, but additions of these may be undesirable, affecting further downstream processing. Organic polyelectrolytes can also be used but are expensive; a possible advance comes from biologically produced flocculants such as proteins or polymer such as chitosan (Oh et al 2001;Strand et al 2002Strand et al , 2003. Flocculation processes are well suited to fresh water environments; however, they are not so efficient in saline environments where the high ionic strength masks the cell-surface charge (Molina Grima et al 2003).…”

Section: Physical Properties Of Microalgaementioning

confidence: 99%

Placing microalgae on the biofuels priority list: a review of the technological challenges

Greenwell

Laurens

Shields

et al. 2009

J. R. Soc. Interface.

715

359

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Microalgae provide various potential advantages for biofuel production when compared with 'traditional' crops. Specifically, large-scale microalgal culture need not compete for arable land, while in theory their productivity is greater. In consequence, there has been resurgence in interest and a proliferation of algae fuel projects. However, while on a theoretical basis, microalgae may produce between 10-and 100-fold more oil per acre, such capacities have not been validated on a commercial scale. We critically review current designs of algal culture facilities, including photobioreactors and open ponds, with regards to photosynthetic productivity and associated biomass and oil production and include an analysis of alternative approaches using models, balancing space needs, productivity and biomass concentrations, together with nutrient requirements. In the light of the current interest in synthetic genomics and genetic modifications, we also evaluate the options for potential metabolic engineering of the lipid biosynthesis pathways of microalgae. We conclude that although significant literature exists on microalgal growth and biochemistry, significantly more work needs to be undertaken to understand and potentially manipulate algal lipid metabolism. Furthermore, with regards to chemical upgrading of algal lipids and biomass, we describe alternative fuel synthesis routes, and discuss and evaluate the application of catalysts traditionally used for plant oils. Simulations that incorporate financial elements, along with fluid dynamics and algae growth models, are likely to be increasingly useful for predicting reactor design efficiency and life cycle analysis to determine the viability of the various options for largescale culture. The greatest potential for cost reduction and increased yields most probably lies within closed or hybrid closed -open production systems.

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Section: Physical Properties Of Microalgaementioning

confidence: 99%

Placing microalgae on the biofuels priority list: a review of the technological challenges

Greenwell

Laurens

Shields

et al. 2009

J. R. Soc. Interface.

715

359

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“…At the time of harvest, 0.3 g CaCl 2 was added as the flocculating agent [13,18]. After filtering the algal suspensions on pre-weighed Whatman papers (No.…”

Section: Harvestingmentioning

confidence: 99%

Investigating the Effects of Several Parameters on the Growth of Chlorella vulgaris Using Taguchi's Experimental Approach

Rezaei¹

2012

Int. J. Biotech. Well. Indus.

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Algae are part of photosynthetic organisms that play an important role in the aquatics nutrition. Like plants, algae need water, light and CO2 to grow. Using Taguchi's experimental approach (5 factors in four levels with 16 runs), effects of several parameters (NaCl, sodium bicarbonate and iron concentrations as well as light and temperature) on the growth of Chlorella vulgaris was studied. Increasing the concentrations of NaCl and sodium bicarbonate resulted in corresponding decreases in the growth of C. vulgaris. Media with 30.0 g/l NaCl did not indicate any algal growth. Also, with 9.0 g/l sodium bicarbonate, biomass production was decreased. Chlorella vulgaris showed different growing behaviors at the various concentrations of iron (Fe +2 ) and at the different temperatures of this study. Maximum biomass production (approximately 3.56 g dry matter) was obtained at the 0.0 g/l sodium bicarbonate, 10.0 g/l NaCl, 18.0 µmol/l iron and at 30±2 °C. Yellow and blue lights increased the algal growth. Analysis of variance showed that salinity (i.e., the NaCl concentration) had the highest impact on the biomass production.

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“…18 and Oh et al . 25 , who found that bioflocculation by bacteria and their exudates could improve the microalgae settling. Among the five studied microalgal strains in cultures 1, C. vulgaris and S. obliquus had the relatively high growth rates in all microalgae, respectively, while A. spiroides showed the lowest rate.…”

Section: Resultsmentioning

confidence: 99%

Screening of microalgae for integral biogas slurry nutrient removal and biogas upgrading by different microalgae cultivation technology

Wang¹,

Bao

Cao

et al. 2017

Sci Rep

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The microalgae-based technology has been developed to reduce biogas slurry nutrients and upgrade biogas simultaneously. In this work, five microalgal strains named Chlorella vulgaris, Scenedesmus obliquus, Selenastrum capricornutum, Nitzschia palea, and Anabaena spiroides under mono- and co-cultivation were used for biogas upgrading. Optimum biogas slurry nutrient reduction could be achieved by co-cultivating microalgae (Chlorella vulgaris, Scenedesmus obliquus, and Nitzschia palea) with fungi using the pelletization technology. In addition, the effects of different ratio of mixed LED light wavelengths applying mixed light-emitting diode during algae strains and fungi co-cultivation on CO2 and biogas slurry nutrient removal efficiency were also investigated. The results showed that the COD (chemical oxygen demand), TN (total nitrogen), and TP (total phosphorus) removal efficiency were 85.82 ± 5.37%, 83.31 ± 4.72%, and 84.26 ± 5.58%, respectively at red: blue = 5:5 under the co-cultivation of S. obliquus and fungi. In terms of biogas upgrading, CH4 contents were higher than 90% (v/v) for all strains, except the co-cultivation with S. obliquus and fungi at red: blue = 3:7. The results indicated that co-cultivation of microalgae with fungi under mixed light wavelengths treatments was most successful in nutrient removal from wastewater and biogas upgrading.

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Untitled

Cited by 225 publications

References 16 publications

Placing microalgae on the biofuels priority list: a review of the technological challenges

Placing microalgae on the biofuels priority list: a review of the technological challenges

Investigating the Effects of Several Parameters on the Growth of Chlorella vulgaris Using Taguchi's Experimental Approach

Screening of microalgae for integral biogas slurry nutrient removal and biogas upgrading by different microalgae cultivation technology

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