Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media

Das, Probir; Thaher, Mahmoud; AbdulQuadir, Mohammed; Khan, Shoyeb; Chaudhary, Afeefa Kiran; Jabri, Hareb Al

doi:10.1016/j.biortech.2018.12.108

Cited by 35 publications

(18 citation statements)

References 33 publications

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“…Bacteria in microalgae culture have varying effect such a symbiosis with microalgae through provision of vitamin B12 and competition with microalgae for nutrients and release of toxic extracellular substances (Kim et al, 2007). Yellow and yellow‐orange color of growth media during water recycling reduce the light penetration in microalgae culture in recycled water (Das, Thaher, et al, 2019; Rodolfi et al, 2003). Xanthophyll accumulation is believed to be responsible for this change in color (Schädler et al, 2020).…”

Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

“…No adverse effect of water recycling on growth of Tetraselmus sp. was observed under semi‐continuous mode for 11 months in outdoor cultivation (Das, Thaher, et al, 2019).…”

Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

“…However, increasing amount of OM due to multiple recycles can increase the fouling of membrane and reduce its efficiency. Iron chloride (FeCl 3 ) can remove OM during microalgae harvesting (Das, Khan, et al, 2019; Farooq, Moon, et al, 2015), but an additional pretreatment step will be required to remove the iron before further processing of biomass (Das, Thaher, et al, 2019). Therefore, attention must be paid to iron content in biomass for downstream processing and utilization.…”

Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

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Sustainable production of microalgae biomass for biofuel and chemicals through recycling of water and nutrient within the biorefinery context: A review

Farooq

2021

GCB Bioenergy

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Commercial‐scale production of microalgae biomass for biofuel and biochemicals requires a substantial amount of water and nutrients. Many studies are conducted to explore the potential of various aqueous streams originating from harvesting stage and different energy recovery steps as an alternative for water and nutrient supply. Presence of toxic organic compounds, unassimilated ions, particulate matter, and high alkalinity in post‐harvest water limit its recyclability. Nutrient recovery from biomass via anaerobic digestion (AD) and various hydrothermal processes is being explored. So, there is a need to understand the impact of harvesting methods, nature and impact of organic compounds, buildup of algogenic organic matter (OM), amount of unused nutrients, and salinity on water recycling. Optimum conditions for maximum nutrient recovery from AD and hydrothermal processes are discussed for effective nutrient recycling. This review is an attempt to understand the challenges associated with the recycling of aqueous streams for water and nutrient requirement for sustainable microalgae cultivation. The effectiveness of a recycling stream is defined here as “biomass ratio.” Possible growth inhibiting factors are identified, and their solutions are suggested along with potential directions for future research. Large‐scale sustainable cultivation of microalgae through recycling of different streams depends on better understanding of biological activity of algal OM through detailed characterization and in‐depth understanding of physiochemical properties.

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Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

“…No adverse effect of water recycling on growth of Tetraselmus sp. was observed under semi‐continuous mode for 11 months in outdoor cultivation (Das, Thaher, et al, 2019).…”

Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

Section: Cultivation Of Microalgae In Recycled Watermentioning

confidence: 99%

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Sustainable production of microalgae biomass for biofuel and chemicals through recycling of water and nutrient within the biorefinery context: A review

Farooq

2021

GCB Bioenergy

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“…The water level was maintained at 20 cm using freshwater to maintain the salinity at 40 ppt. Agitation was achieved through a four-blade paddle system rotating at 32 rpm, resulting in an average linear liquid velocity of 26.2 cm/s (Das et al, 2019…”

Section: Outdoor Cultivation Conditionsmentioning

confidence: 99%

“…This would, in turn, improve the photosynthetic efficiency of the cultivation process, allowing for maximizing outdoor biomass productivities through deployment in areas with the highest production potential, such as the Middle East and North Africa region (Tredici, 2010). Qatar, a peninsula located in the Arabian Gulf, is one such location, and a number of high‐potential strains have been isolated from the region (Das et al, 2019, Saadaoui et al, 2016, Schipper et al, 2019). One strain, in particular, has already been investigated for its potential to produce phycocyanin‐rich biomass under simulated desert climate conditions, and only limited photoinhibition was observed at high light intensities of 1800 μmol photons/m 2 /s (Schipper et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Outdoor scale‐up of Leptolyngbya sp.: Effect of light intensity and inoculum volume on photoinhibition and ‐oxidation

Schipper

Das

Muraikhi

et al. 2021

Biotech & Bioengineering

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The effect of light intensity and inoculum volume on the occurrence of photooxidation for Leptolyngbya sp. QUCCCM 56 was investigated, to facilitate the transition from small-scale laboratory experiments to large-scale outdoor cultivation. Indoor, the strain was capable of growing at light intensities of up to 5600 µmol photons/m 2 /s, at inoculation densities as low as 0.1 g/L (10% inoculation volume vol/vol). Levels of chlorophyll and phycocyanin showed a significant decrease within the first 24 h, indicating some level of photooxidation, however, both were able to recover within 72 h. When cultivated under outdoor conditions in Qatar during summer, with average peak light intensities 1981 ± 41 μmol photons/m 2 /s, the strain had difficulties growing. The culture recovered after an initial adaptation period, and clear morphological differences were observed, such as an increase in trichome length, as well as coiling of multiple trichomes in tightly packed strands. It was hypothesized that the morphological changes were induced by UV-radiation as an adaptation mechanism for increased self-shading. Furthermore, the presence of contaminating ciliates could have also affected the outdoor culture. Both UV and contaminants are generally not simulated under laboratory environments, causing a mismatch between indoor optimizations and outdoor realizations.

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Unveiling Tetraselmis subcordiformis lipidome dynamics during large-scale cultivation in open raceway pond

Saadaoui,

Cherif,

Siddiqui

et al. 2024

J Appl Phycol

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A local microalgal strain of Tetraselmis subcordiformis was cultivated at large-scale using open raceway pond. The temporal influence on the growth and lipidomic profile of the strain was investigated using optic density (OD) measurement and ultra-high pressure liquid chromatography. Results showed that triglycerides represented 57% of the total lipids on day 11 (exponential phase) and stayed consistently high until stationary phase, without affecting the biomass quantity. Moreover, a high expression of monounsaturated fatty acids and polyunsaturated fatty acids such as ω-3 eicosapentaenoic acid (20:5), docosahexaenoic acid (22:6), palmitic (16:0) and palmitoleic acid (16:1) was observed by stationary phase. Carotenoid analysis also revealed the increase in lutein (65.2%) and β-carotene (71.4%) from day 6 to day 15. Our study showed that T. subcordiformis contained the highest amounts of valuable lipids, fatty acids and pigments in the stationary phase, which started on day 15 of culture.

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Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media

Cited by 35 publications

References 33 publications

Sustainable production of microalgae biomass for biofuel and chemicals through recycling of water and nutrient within the biorefinery context: A review

Sustainable production of microalgae biomass for biofuel and chemicals through recycling of water and nutrient within the biorefinery context: A review

Outdoor scale‐up of Leptolyngbya sp.: Effect of light intensity and inoculum volume on photoinhibition and ‐oxidation

Unveiling Tetraselmis subcordiformis lipidome dynamics during large-scale cultivation in open raceway pond

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