Minimizing leakage from a smelter off-gas system by enhanced control

Shang, Helen; Scott, John A.

doi:10.1016/j.jclepro.2010.08.015

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…In order to identify extremeophile microalgae that are tolerant of low pH, we queried the AMIS database to identify any lignite mines (brown coal). Lignite is typically mined from soil which is rich in sulfur, which can give rise to low pH water bodies (Muzik 1982 ; Shang and Scott 2011 ). According to the AMIS database, the Onakawana mine (located at 81.433 longitude and 48.419 latitude) is the only abandoned lignite mine registered in Ontario.…”

Section: Resultsmentioning

confidence: 99%

“…In the mining sector, off-gas that is typically exhausted to the environment could be sparged into culture vessels to provide agitation and CO 2 as a carbon source for photosynthesis and lipid production (Scott et al, 2010 ). A technical challenge to this potential process is potential drop in culture pH as smelting off-gas is typically rich in sulfur dioxide (Shang and Scott 2011 ), which in an aqueous environment can result in the production of sulfuric acid. However, due to ability for Lig 290 to survive at a low pH, this acid-tolerant microalgae could conceivably consume CO 2 in the off-gas and convert it to biomass (Larkum et al 2012 ).…”

Section: Discussionmentioning

confidence: 99%

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Bioprospecting for acidophilic lipid-rich green microalgae isolated from abandoned mine site water bodies

et al. 2014

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With fossil fuel sources in limited supply, microalgae show tremendous promise as a carbon neutral source of biofuel. Current microalgae biofuel strategies typically rely on growing high-lipid producing laboratory strains of microalgae in open raceways or closed system photobioreactors. Unfortunately, these microalgae species are found to be sensitive to environmental stresses or competition by regional strains. Contamination by invasive species can diminish productivity of commercial algal processes. A potential improvement to current strategies is to identify high-lipid producing microalgae, which thrive in selected culture conditions that reduce the risk of contamination, such as low pH. Here we report the identification of a novel high-lipid producing microalgae which can tolerate low pH growth conditions. Lig 290 is a Scenedesmus spp. isolated from a low pH waterbody (pH = 4.5) in proximity to an abandoned lignite mine in Northern Ontario, Canada. Compared to a laboratory strain of Scendesmus dimorphus, Lig 290 demonstrated robust growth rates, a strong growth profile, and high lipid production. As a consequence, Lig 290 may have potential application as a robust microalgal species for use in biofuel production.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Bioprospecting for acidophilic lipid-rich green microalgae isolated from abandoned mine site water bodies

et al. 2014

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“…The CO 2 content of cement production off-gas has been reported as 15-25% and as 6-7% in smelter furnace off-gas . In addition, industrial off-gases released to the environment contain significant amount of waste heat that could be utilized to maintain the temperature of open ponds in cold climate regions (Shang and Scott, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…These regions are often semi-arid and suffer from lack of freshwater. Whereas regions that are rich in freshwater generally experience seasonal cold climates and consequently are not considered for outdoor algal production unless sources of ''free'' heat, such as that contained within off-gas can be utilized (Shang and Scott, 2011).…”

Section: Introductionmentioning

confidence: 99%