Selection of Microalgae and Cyanobacteria Strains for Bicarbonate-Based Integrated Carbon Capture and Algae Production System

Chi, Zhanyou; Elloy, Farah C.; Xie, Yao Jie; Hu, Yucai; Chen, Shulin

doi:10.1007/s12010-013-0515-5

Cited by 64 publications

(23 citation statements)

References 27 publications

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“…3 b). For the other three groups, pH values were always less than 10.5, indicating that higher concentrations of bicarbonate/carbonate had better pH buffer effects [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…A higher concentration of bicarbonate is preferred for a BICCAPS, since it not only has a stronger pH buffering effect, as shown above, but also makes the CO 2 absorption process more efficient and supplies more inorganic carbon at the beginning of each culture [ 27 ]. A lower sodium bicarbonate concentration of 0.15 mol L −1 was used in a previous study on the culture of N. oleoabundans [ 17 , 29 ].…”

Section: Discussionmentioning

confidence: 99%

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A recycling culture of Neochloris oleoabundans in a bicarbonate-based integrated carbon capture and algae production system with harvesting by auto-flocculation

Zhu

Zhang

Cheng

et al. 2018

Biotechnol Biofuels

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BackgroundA bicarbonate-based integrated carbon capture and algae production system (BICCAPS) uses carbonate to capture CO2 and produce bicarbonate for alkalihalophilic microalgal cultivation. In this process, carbonate is regenerated and re-used for CO2 capture. However, a practical example of a recycling culture to prove its feasibility is still absent.ResultsTo reach this goal, a recycling culture of Neochloris oleoabundans was created in this study. The effect of bicarbonate concentration on N. oleoabundans growth showed that the highest productivity was obtained at 0.3 mol L−1, but the highest apparent carbon utilization efficiency was obtained at 0.1 mol L−1. The harvest of algal biomass was tested with alkaline flocculation, which is induced by high pH due to bicarbonate consumption. The result showed that the maximum recovery rate of 97.7 ± 0.29% was reached with a supplement of 20 mM Ca2+. Compared with this, alkaline flocculation without Ca2+ also resulted in a high recovery rate of up to 9 7.4± 0.21% in culture with 0.7 mol L−1 bicarbonate. In recycling culture, the spent medium was bubbled with CO2 and re-used for algal culture. After eight times of recycling, biomass productivity in recycling culture with 0.1 and 0.3 mol L−1 bicarbonate was 0.24 and 0.39 g L−1 day−1, respectively, higher than the 0.20 and 0.30 g L−1 day−1 in the control. The apparent carbon utilization efficiencies achieved in these semi-continuous cultures with 0.1 mol L−1 bicarbonate were 242 ± 3.1 and 266 ± 11% for recycling and control culture, respectively, while those with 0.3 mol L−1 bicarbonate were 98 ± 0.78 and 87 ± 3.6%, respectively.ConclusionsThis study proved the feasibility of BICCAPS recycling culture with the first practical example. More importantly, the produced algal biomass can be harvested without any flocculant supplement. Thus, this process can reduce both culturing and harvesting costs in algal biomass production.

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“…3 b). For the other three groups, pH values were always less than 10.5, indicating that higher concentrations of bicarbonate/carbonate had better pH buffer effects [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A recycling culture of Neochloris oleoabundans in a bicarbonate-based integrated carbon capture and algae production system with harvesting by auto-flocculation

Zhu

Zhang

Cheng

et al. 2018

Biotechnol Biofuels

Self Cite

View full text Add to dashboard Cite

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“…The cell pellets were then washed twice with 1% (w/v) salt water, to avoid osmotic pressure change caused by fresh water. After that, this salt water was added to the cell pellets to make a final volume of 5 mL, and placed in a petri dish for drying at 105 °C for 4 h. Then, dry cell weight was calculated by subtracting salt weight from the total dry weight (Chi et al 2014). …”

Section: Dry Cell Weight Measurementmentioning

confidence: 99%

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Zhu

Cheng

et al. 2017

Bioresour. Bioprocess.

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Background: Mixing in traditional algae culture system consumes intensive electricity. This should be replaced by nature force to reduce energy cost and, more importantly, to realize positive energy balance of algal biofuel production. This study aims to develop a horizontal photobioreactor, in which mixing can be provided with rocking movement driven by nature force.Results: Simple boxes were used as small-scale horizontal photobioreactors on a rocking platform for culture of alkalihalophilic Euhalothece sp. ZM001. There was no CO 2 gas bubbling since 1.0 M NaHCO 3 supplied sufficient inorganic carbon in it. Effect of culture depth, rocking cycle, and light intensity to algal biomass production, pH change, and DO accumulation were investigated in this system. Biomass concentration of 2.73 g/L was achieved in culture with 2.5 cm depth, and maximum productivity of 17.06 g/m 2 /day was obtained in culture with 10 cm depth. k L a in PBR with different culture depths and rocking cycles was measured, and it was from 0.57 to 33.49 h −1, showing great variation. To test this system at large scale, a plastic bag with a surface area of 1 m 2 was placed on a rocking platform driven by water power, and it resulted in a biomass concentration of 1.88 g/L. Conclusion: These results proved feasibility of a novel photobioreactor system driven by nature force, as well as low cost of manufacturing, and easy scaling-up.

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“…Haloalkaliphilic eukaryotic algae and cyanobacteria can use bicarbonate instead of CO 2 at high pH [12, 13]. Thus, CO 2 could be transferred to the growth medium in a separate trickling filter with low pressure drop and driven by the pH equilibrium, reducing energy requirements and operational costs of the carbon supply [9, 10]. The growth of algae using bicarbonate as a method to sequester carbon dioxide has previously been suggested [9–11].…”

Section: Introductionmentioning

confidence: 99%

Robust, high-productivity phototrophic carbon capture at high pH and alkalinity using natural microbial communities

Sharp

Urschel

Dong

et al. 2017

Biotechnol Biofuels

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BackgroundBioenergy with carbon capture and storage (BECCS) has come to be seen as one of the most viable technologies to provide the negative carbon dioxide emissions needed to constrain global temperatures. In practice, algal biotechnology is the only form of BECCS that could be realized at scale without compromising food production. Current axenic algae cultivation systems lack robustness, are expensive and generally have marginal energy returns.ResultsHere it is shown that microbial communities sampled from alkaline soda lakes, grown as biofilms at high pH (up to 10) and high alkalinity (up to 0.5 kmol m−3 NaHCO3 and NaCO3) display excellent (>1.0 kg m−3 day−1) and robust (>80 days) biomass productivity, at low projected overall costs. The most productive biofilms contained >100 different species and were dominated by a cyanobacterium closely related to Phormidium kuetzingianum (>60%).ConclusionFrequent harvesting and red light were the key factors that governed the assembly of a stable and productive microbial community.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0769-1) contains supplementary material, which is available to authorized users.

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Selection of Microalgae and Cyanobacteria Strains for Bicarbonate-Based Integrated Carbon Capture and Algae Production System

Cited by 64 publications

References 27 publications

A recycling culture of Neochloris oleoabundans in a bicarbonate-based integrated carbon capture and algae production system with harvesting by auto-flocculation

A recycling culture of Neochloris oleoabundans in a bicarbonate-based integrated carbon capture and algae production system with harvesting by auto-flocculation

Plastic bag as horizontal photobioreactor on rocking platform driven by water power for culture of alkalihalophilic cyanobacterium

Robust, high-productivity phototrophic carbon capture at high pH and alkalinity using natural microbial communities

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