Sustainable production of toxin free marine microalgae biomass as fish feed in large scale open system in the Qatari desert

Das, Probir; Thaher, Mahmoud; Hakim, Mohammed Abdul Quadir Mohd Abdul; Jabri, Hareb Al

doi:10.1016/j.biortech.2015.05.019

Cited by 39 publications

(22 citation statements)

References 31 publications

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“…After 10 days of growth, the cultures were centrifuged to separate the biomass and stored inside − 20 °C fridge until any metabolite analysis. The outdoor growth experiments for these two strains were conducted simultaneously in two identical 25,000-L raceway ponds; details of the raceway ponds were mentioned elsewhere (Das et al 2015). At first, 1 L culture of each strain was inoculated into a 10-L plastic PBR; a total of 5 similar PBRs were prepared for each strain.…”

Section: Indoor and Outdoor Microalgal Growth Experimentsmentioning

confidence: 99%

“…Abundant sunlight throughout the year, availability of unutilized desert land, and proximity to the sea render cultivation of marine microalgae/cyanobacteria, in Qatar, very attractive (Das et al 2015. The primary objective of this study was to compare the biocrude yield and quality of a self-settling microalga and another non-settling microalgal biomass produced at large scale in the Qatari desert environment.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment

Das

Thaher

Khan

et al. 2019

Int. J. Environ. Sci. Technol.

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The present study investigated the growth, harvesting, biocrude conversion, and recycling of the HTL aqueous phase for one self-settling (i.e., Chlorocystis sp.) and another non-settling (i.e., Picochlorum sp.) marine microalgae. Both the strains were grown simultaneously in 2 identical 25,000-L raceway ponds in the Qatari desert. The cell size of Picochlorum sp. was small (2-3 µm), and its biomass was harvested using a centrifuge. Cells of Chlorocystis sp. (6-9 µm) formed flocs that settled spontaneously in a sedimentation chamber. Harvested biomass of these two strains was then converted to biocrude oil, using a 500-mL Parr reactor. The biocrude yield of Picochlorum sp. and Chlorocystis sp. was 39.6 ± 1.15% and 34.8 ± 1.65%, respectively. The energy content of the biocrude oil was 32.78 and 33.38 MJ/kg for Chlorocystis sp. and Picochlorum sp., respectively. Both the strains were capable of efficiently utilizing more than 95% nitrogen of the HTL aqueous phase. Although lower biocrude yield was obtained from Chlorocystis sp., compared to Picochlorum sp., harvesting of Chlorocystis sp. would require much lower energy compared to Picochlorum sp. Therefore, a self-settling microalgae (e.g., Chlorocystis sp.) could potentially be a better candidate, over non-settling microalgae, for producing biofuel feedstock.

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Section: Indoor and Outdoor Microalgal Growth Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment

Das

Thaher

Khan

et al. 2019

Int. J. Environ. Sci. Technol.

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“…Some of the promising strains (e.g., Nannochloropsis sp., Tetraselmis sp., Chroococcidiopsis sp., Synechococcus sp., Chlorella sp., Scenedesmus sp.) were successfully grown in the desert at a scale 200 L-100,000 L [85,86,99,100].…”

Section: Challenges In Large-scale Cultivation Of Microalgaementioning

confidence: 99%

Sustainable Agriculture in the Arabian/Persian Gulf Region Utilizing Marginal Water Resources: Making the Best of a Bad Situation

2018

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One way to encourage agricultural self-sufficiency in arid regions is to increase the productivity of conventional freshwater agriculture. Another way is to develop and implement novel strategies and technologies that do not deplete scarce freshwater. Here we describe several options for countries in the Gulf region to increase their agricultural production by taking advantage of a lesser used resource-marginal water. Marginal water can be treated sewage effluent, produced oilfield water, brackish groundwater or seawater. We describe how this resource can be used to grow salt-tolerant forage crops, microalgae and aquaculture crops. Policies needed to implement and/or scale-up such practices are also outlined.

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“…In general, these reactors reflect the natural algae environment. The first open ponds were built in the 1950s, and research in this field is still continuing (Das et al 2015). Raceway ponds are an improvement on simple ponds and are usually equipped with a paddle wheel to generate a higher flow velocity (see Fig.…”

Section: Reactor Systemsmentioning

confidence: 99%

Primary Production

et al. 2017

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Sustainable production of toxin free marine microalgae biomass as fish feed in large scale open system in the Qatari desert

Cited by 39 publications

References 31 publications

Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment

Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment

Sustainable Agriculture in the Arabian/Persian Gulf Region Utilizing Marginal Water Resources: Making the Best of a Bad Situation

Primary Production

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