Potential of New Strains of Marine and Inland Saline‐Adapted Microalgae for Aquaculture

Barclay, William R.; Terry, Kenneth L.; Nagle, Nick; Weissman, Joseph C.; Goebel, R.P.

doi:10.1111/j.1749-7345.1987.tb01031.x

Cited by 26 publications

(11 citation statements)

References 18 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it was concluded that chemical flocculation was too expensive for biofuels production and incorporation of large amount of metal salts in the harvested biomass limits its use and creates disposal problems (Sheehan et al 1998;Molina Grima et al 2003). Polymeric organic flocculants (polyelectrolytes) on the other hand are highly charged organic aggregates, non-toxic, required in small amounts, produce more stable flocs and thus, are more attractive flocculation option (Barclay et al 1985;Sheehan et al 1998). Some algal species are reported to naturally flocculate after transfer to settling ponds when left quiescent for some time (Nakamura et al 2005).…”

Section: Harvesting Of Microalgal Biomassmentioning

confidence: 99%

Microalgae as second generation biofuel. A review

Singh¹,

Dhar²

2011

Agron. Sustain. Dev.

152

View full text Add to dashboard Cite

Microalgae are autotrophic microorganisms having extremely high photosynthetic efficiency and are valued as rich source of lipids, hydrocarbons, and other complex oils for biodiesel besides being an invaluable source of bioethanol, biomethane, and biohydrogen. Biodiesel produced from oilseed crops such as jatropha and soy have lower yields per unit land area and threaten food security. Indeed, microalgae have higher oil yields amounting to about 40 times more oil per unit area of land in comparison to terrestrial oilseed crops such as soy and canola. Further, microalgae production does not require arable land for cultivation. Biofuel is regarded as a proven clean energy source and several entrepreneurs are attempting to commercialize this renewable source. Technology for producing and using biofuel has been known for several years and is frequently modified and upgraded. In view of this, a review is presented on microalgae as second generation biofuel. Microalgal farming for biomass production is the biggest challenge and opportunity for the biofuel industry. These are considered to be more efficient in converting solar energy into chemical energy and are amongst the most efficient photosynthetic plants on earth. Microalgae have simple cellular structure, a lipid-rich composition, and a rapid rate of reproduction. Many microalgal strains can be grown in saltwater and other harsh conditions. Some autotrophic microalgae can also be converted to heterotrophic ones to accumulate high quality oils using organic carbon. However, there are several technical challenges that need to be addressed to make microalgal biofuel profitable. The efficiency of microalgal biomass production is highly influenced by environmental conditions, e.g., light of proper intensity and wavelength, temperature, CO 2 concentration, nutrient composition, salinities and mixing conditions, and by the choice of cultivation systems: open versus closed pond systems, photobioreactors. Currently, microalgae for commercial purpose are grown mostly in open circular/elongated "raceway" ponds which generally have low yields and high production costs. However, a hybrid system combining closed photobioreactor and open pond is a better option. The biggest hurdle in commercialization of microalgal biofuel is the high cost and energy requirement for the microalgal biomass production, particularly agitation, harvesting, and drying of biomass. In order to conserve energy and reduce costs, algae are often harvested in a two-step process involving flocculation followed by centrifugation, filtration, or micro-straining to get a solid concentration. However, the major bottlenecks in algal biodiesel production within the cell can be identified and handled by adopting a system approach involving transcriptomics, proteomics, and metabolomics. Research and developments in the field of new materials and advanced designs for cultivation in closed bioreactors, use of waste water for biomass production, screening of efficient strains, high-value coproduct strategy,...

show abstract

Section: Harvesting Of Microalgal Biomassmentioning

confidence: 99%

Microalgae as second generation biofuel. A review

Singh¹,

Dhar²

2011

Agron. Sustain. Dev.

152

View full text Add to dashboard Cite

show abstract

“…Growth responses to waters of different chem istry (three water types), conductivity (five lev els), and temperature (six levels) were deter mined according to the methods described by Barclay et al (1987). The strategy behind the development of the standard inland water types, and procedures for preparing them have been described previously .…”

Section: Methodsmentioning

confidence: 99%

“…Exponential growth rates in each treatment were quantified as described by Barclay et al (1987). The Ca: Mg ratio was kept constant at 2 : 3, close to the orig inal ratio in the 1125 medium.…”

Section: Methodsmentioning

confidence: 99%

Influence of ionic parameters on the growth and distribution of Boekelovia hooglandii (Chromophyta)

et al. 1991

Self Cite

View full text Add to dashboard Cite

1991. Influence of ionic parameters on the growth and distribution of Boekolovia hooglandii (Chromophyta). Phycologja 30: 355-364.The small, flagellated monad Boekelovia hooglandii Nicolai et Baas Becking (Chromophyta) has not been reported in the literature since its initial discovery in a saline swimming pool in the Netherlands in 1935. This alga was recently observed in several temporary saline ponds in the central and western USA. The water where the alga was most abundant was characterized by a high concentration of sodium and bicarbonate ions, and a high monovalent : divalent (M : D) ionic ratio. Results of ex periments to evaluate the growth and photosynthetic efficiency of B. hooglandii in several water types indicated that the alga exhibited its optimum growth rate and photosynthetic efficiency in water types with high M : D ratios. Growth rates tended to decline when divalent cation concentrations exceeded 20 mM. Despite exhibiting optimum growth in high M : D waters, the data also indicated that B. hooglandii could grow relatively well in lower M : D saline waters, such as seawater. Factors other than ionic composition appear to be limiting the distribution of this species in such waters. However, this alga appears to be much more abundant, particularly in temporary saline waters, than previously reported.

show abstract

“…This choice was motivated by its resistant cell walls [17], an ability to adapt to environmental variations [18], and a fast growth rate of up to 2 doublings per day [17]. The cells were obtained from culture B 326 of the Culture Collection of Algae at the University of Texas (UTEX) at Austin, and cultivated in Bristol Medium.…”

Section: Microalgal Materialsmentioning

confidence: 99%

“…Thus, Monoraphidium minutum was selected for its high cell wall resistance level [17]. This strain is also able to grow at high rate under well-documented culture conditions [17,18].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of lipid mechanical extraction from viable Monoraphidium minutum

Dommange

Tanguy

Jolicœur

2015

Microalgae Biotechnology

View full text Add to dashboard Cite

Background. Mechanical stress was investigated as a mean to harvest microalgal lipids without affecting algal cells’ viability. Monoraphidium minutum was cultivated in laboratory-scale photobioreactors and suspension cultures were submitted to mechanical stress to compare a cyclone, a centrifuge and a homogenizer. Lipid content within the extracellular medium was analyzed prior to and after treatment, and the amount of released lipids was quantified. Algal cell viability was also evaluated before and after treatment.Results. After mechanical-stress treatments, 7.0 to 12.7% of the intracellular lipids of Monoraphidium minutum were released and found in the extracellular medium, while recovered algal cells presented low levels of disruption after treatments.Conclusions. To the best of our knowledge, this is the first proof-of-concept demonstration on the use of mechanical stress for lipid extraction from viable microalgae. Certain level of centrifugation proved to make algae release around 10% of their lipids to the extracellular medium. This mostly exploratory work calls for deeper investigation, paving the way for a biofuel production based on continuous lipid recovery and microalgae reuses.

show abstract

Potential of New Strains of Marine and Inland Saline‐Adapted Microalgae for Aquaculture

Cited by 26 publications

References 18 publications

Microalgae as second generation biofuel. A review

Microalgae as second generation biofuel. A review

Influence of ionic parameters on the growth and distribution of Boekelovia hooglandii (Chromophyta)

Feasibility of lipid mechanical extraction from viable Monoraphidium minutum

Contact Info

Product

Resources

About