Treatment potential of a synergistic botanical pesticide combination for rotifer extermination during outdoor mass cultivation of Spirulina platensis

Huang, Yuan; Liu, Jianguo; Li, Ang; Gao, Zhigang

doi:10.1016/j.algal.2014.11.003

Cited by 21 publications

(6 citation statements)

References 27 publications

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“…In addition, contamination elevated the cost of microalgal cultivation and resulted in economically infeasible. Biological contamination of Spirulina platensis culture by rotifers led to a loss of USD 1230 worth of dry biomass [ 60 ]. To date, only one study reported the effect of biological contaminants, protozoa, on the growth and fucoxanthin content of P. tricornutum [ 61 ].…”

Section: Obstacles and Possible Solutionsmentioning

confidence: 99%

Fucoxanthin Production of Microalgae under Different Culture Factors: A Systematic Review

et al. 2022

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Fucoxanthin is one of the light-harvesting pigments in brown microalgae, which is increasingly gaining attention due to its numerous health-promoting properties. Currently, the production of microalgal fucoxanthin is not yet feasible from an economic perspective. However, the cultivation of microalgae at favourable conditions holds great potential to increase the viability of this fucoxanthin source. Hence, this study aimed to review the fucoxanthin production of microalgae under different conditions systematically. A literature search was performed using the Web of Science, Scopus and PubMed databases. A total of 188 articles were downloaded and 28 articles were selected for the current review by two independent authors. Microalgae appeared to be a more reliable fucoxanthin source compared to macroalgae. Overall, a consensus fucoxanthin production condition was obtained and proposed: light intensity ranging from 10 to 100 µmol/m2/s could achieve a higher fucoxanthin content. However, the optimal light condition in producing fucoxanthin is species-specific. The current review serves as an antecedent by offering insights into the fucoxanthin-producing microalgae response to different culture factors via a systematic analysis. With the current findings and recommendations, the feasibility of producing fucoxanthin commercially could be enhanced and possibly achieve practical and sustainable fucoxanthin production.

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Section: Obstacles and Possible Solutionsmentioning

confidence: 99%

Fucoxanthin Production of Microalgae under Different Culture Factors: A Systematic Review

et al. 2022

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“…2010), a chemical growth inhibition rate of >50 microalgal cells · rotifer −1 · h −1 , and a rotifer daily intrinsic rate of increase of 0.7 (Snell 1998, Huang et al. 2014), the microalgal cells in the culture would disappear completely in a few days. In this “campaign of predation,” the chemical inhibition of cell growth by rotifers contributes more than 9% of the “lethality.” Of course, the dates might be vary under different conditions.…”

Section: Discussionmentioning

confidence: 99%

Chemical inhibition of Chlorella sp. by rotifers

Zhang

Liu

2020

Journal of Phycology

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To test the hypothesis that rotifers release one or more chemical microalgal growth inhibitors in addition to devouring the microalgal cells, the effects of different concentrations of filtered, bacteria-free, rotifer culture filtrate (RCF) on the growth and physiological parameters of Chlorella sp., and the response of Chlorella sp. at different starting cell densities to 10% RCF, were studied. The results show that RCF significantly decreased Chlorella cell densities during the incubation, suggesting that rotifers release some chemical(s) that inhibit microalgal cell growth. Chlorella cell densities decreased with increasing RCF concentration. Increasing the initial cell density of Chlorella dispersed the inhibitory chemical(s) present in 10% RCF over more cells, reducing their effect. The results confirm that the action of the chemical(s) released by rotifers on microalgal cell growth was dependent on both the RCF concentration and the exposure time. They also demonstrate that ≥10% RCF significantly inhibited photosynthesis and respiration, which would account for some of the decreased Chlorella cell growth in the presence of RCF. Calculations based on the data indicate that the rotifer-derived chemical(s) released hourly from each rotifer inhibits growth by 45.5 microalgal cells in addition to the rotifer predation, with a 48 h LC 50 value of 18.8% RCF. Based on these results, fresh medium instead of the old culture medium was contaminated by the rotifers.

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“…According to Huang’s acute and chronic tests, celangulin, matrine, and toosendanin are considered to be good potential rotifer-control botanical pesticides in microalgal mass culture [ 42 ]. In addition, rotifer-control effects of the synergistic celangulin/toosendanin combination for Spirulina platensis growth were further investigated; here, 0.003–0.006 mg/L of the botanical pesticide combination at a 1:9 ratio can inhibit rotifer regeneration within 3 days, and no influences on the Spirulina biomass and phycocyanin levels showed up [ 69 ]. Zhang also found that the celangulin/toosendanin combination at 1:9 could eliminate the breeding of Brachionus plicatilis , thus healing the photosynthetic performance of nannochloropsis cells against the contamination damage of rotifer [ 70 ].…”

Section: Strategies For Controlling Biological Contaminationmentioning

confidence: 99%

Overcoming the Biological Contamination in Microalgae and Cyanobacteria Mass Cultivations for Photosynthetic Biofuel Production

2020

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Microalgae and cyanobacteria have shown significant potential for the development of the next biofuels innovation because of their own characteristics as photosynthetic microorganisms. However, it is confronted with a lot of severe challenges on the economic scaling-up of the microalgae- and cyanobacteria-based biofuels production. One of these major challenges is the lack of a reliable preventing and controlling culture system of biological contamination, which can attack the cell growth or product accumulation causing crashing effects. To increase the commercial viability of microalgae- and cyanobacteria-based biofuels production, overcoming the biological contaminations should be at the top of the priority list. Here, we highlight the importance of two categories of biological contaminations and their controlling strategies in the mass cultivations of microalgae and cyanobacteria, and outline the directions that should be exploited in the future.

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Treatment potential of a synergistic botanical pesticide combination for rotifer extermination during outdoor mass cultivation of Spirulina platensis

Cited by 21 publications

References 27 publications

Fucoxanthin Production of Microalgae under Different Culture Factors: A Systematic Review

Fucoxanthin Production of Microalgae under Different Culture Factors: A Systematic Review

Chemical inhibition of Chlorella sp. by rotifers

Overcoming the Biological Contamination in Microalgae and Cyanobacteria Mass Cultivations for Photosynthetic Biofuel Production

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