Cultivo da microalga  Pseudokirchneriella subcapitata em escala de bancada utilizando meio contaminado com metais pesados

Ansilago, Mônica; Ottonelli, Franciéli; Carvalho, Emerson Machado de

doi:10.1590/s1413-41522016124295

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…The culture medium of the microalgae was prepared by adding 1 mL of NPK stock solution to 1 liter of distilled water that was autoclaved at 120°C for 20 minutes (e.g., Ansilago et al, 2016). The NPK stock solution was prepared with 0.70 gL -1 of chemical fertilizer N:P:K (20-5-20 gL -1 ), according to Sipaúba-Tavares and Rocha (1993) and Carvalho et al (2012).…”

Section: Methodsmentioning

confidence: 99%

“…In this strategy, it is possible to use the organism for production of bioactive compounds and surfactants, for different uses in biofuels, biofertilizers, biopolymers, biofilms, among many others (Carvalho et al, 2012;Schmitz et al, 2012;Gouveia et al, 2016). Some factors are important to regulate the kinetics growth of microalgae and contribute with high production of algal biomass; for instance, the concentration of nutrients present in the medium, the luminosity and the temperature (Carvalho et al, 2012;Wang et al, 2014;Ansilago et al, 2016). Currently, one of the major obstacles in the production of industrial scale microalgae lies in the high cost of culture medium.…”

Section: Introductionmentioning

confidence: 99%

“…An alternative culture medium that has been widely used is chemical fertilizer based in nitrogen, phosphorus and potassium (NPK), due to the high concentrations of micro and macronutrients. Besides, it presents low cost, availability in the market and facility in the preparation of culture medium (Sipaúba-Tavares et al, 2009;Carvalho et al, 2012;Ansilago et al, 2016). In order for it to become even more economically attractive, it is necessary to add value to the cultivation process.…”

Section: Introductionmentioning

confidence: 99%

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Metals bioremediation potential using Pseudokirchneriella subcapitata

Ansilago

Ottonelli

Carvalho

2021

Rev. Bras. Ciênc. Ambient. (Online)

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Microalgae are unicellular organisms, photosynthesizers that present cell duplication exponentially and biosorption capacity of nutrients dissolved in water. The objective of this work was to evaluate the capacity of the microalga Pseudokirchneriella subcapitata for bioremediation of metals and salts. In this aspect, the reduction of the metals and salts in the synthetic effluents by the microalga P. subcapitata was evaluated: (T1) culture medium (control); (T2) culture medium contaminated with aluminum chloride; (T3) culture medium contaminated with ferrous sulfate; (T4) culture medium contaminated with zinc sulfate; (T5) culture medium contaminated with the combination of aluminum chloride, ferrous sulfate and zinc sulfate. The bioremediation process was evaluated by comparing culture media with suspended microalgae to a filtrate version of the same medium. Iron and zinc metals, as well as nitrogen and phosphorus salts, showed depleted values in the filtered medium, indicating efficiency in the treatment of water by microalgae. Aluminum content was below the limit of detection in all treatments. The cumulative values in the microalgae biomass were, in descending order: nitrogen, zinc, iron and phosphorus, thus indicating the assimilation of the contaminants in the algal biomass. In addition, high biomass production of the microalgae was observed. The highest production rate was verified in the synthetic effluent with the association of metals, indicating a synergy between contaminants, which was probably responsible for reducing the toxic effect on the microalgae. These results indicated high potential for bioremediation by microalga P. subcapitata, besides the possibility of using algal biomass for biotechnological applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metals bioremediation potential using Pseudokirchneriella subcapitata

Ansilago

Ottonelli

Carvalho

2021

Rev. Bras. Ciênc. Ambient. (Online)

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“…Unfavorable conditions, whether due to the absence or excess of some nutrient, may result in changes in morphology (Martínez, Ascaso, & Orús, 1991), primary composition (Liu, Wang, & Zhou, 2008;Ansilago, Ottonelli, & De Carvalho, 2016) and the production of pigments (Yamaguchi, 1996). The use of effluents from intensive aquaculture systems has potential as an alternative culture medium for microalgae (Trivedi et al, 2019).…”

Section: Water Quality and Nutrient Removalmentioning

confidence: 99%

Growth of Chlorella vulgaris using wastewater from Nile tilapia (Oreochromis niloticus) farming in a low-salinity biofloc system

et al. 2019

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The present study aimed to analyze the growth of Chlorella vulgaris in the effluent of a Biofloc Technology (BFT) system used in the Nile tilapia fingerlings farming. The conditions were cultivated by 10 days at 25 ± 2ºC, 90 μmol photons m−2 s−1 irradiance, under constant aeration (without addition of CO2), and with different BFT effluent proportions (0, 50, and 100%). After 24 hours of the inoculation that marked the beginning of the experiment, the development and multiplication of the cells were verified, demonstrating that the BFT effluent used in the Nile tilapia farming was favorable for the cultivation of the microalga Chlorella vulgaris. As expected, the Provasoli culture medium presented the best performance (1,520 ± 75 104 cells mL-1) in relation to the growth of the microalga. However, during the first four days of cultivation, C. vulgaris showed higher growth in treatments containing BFT effluent. C. vulgaris removed 93.6% of the nitrate contained in the BFT effluent. The results of the present study showed the potential use of C. vulgaris on Integrated Multi-Trophic Aquaculture with Nile tilapia fingerlings. In addition to removing nitrate and other nitrogen compounds, C. vulgaris biomass could be used to feed zooplankton or Nile tilapia larvae.

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“…Algae are also of significant use in the performance of bioassays, in the mitigation of environmental damage, and wastewater treatment systems such as biofloc technologies (Jung et al, 2017). Microalgae are capable of assimilating inorganic compounds, heavy metals, and nutrients present in aquatic environments (Mcginn et al, 2012;Wuang, Khin, Chua & Luo, 2016) and have been increasingly employed in laboratory cultivation tests due to their high productivity and the ease at which they are maintained (Carvalho et al, 2012;Ansilago, Otonelli & Carvalho, 2016).…”

Section: Introductionmentioning

confidence: 99%

Phycoremediation of fish farm wastewater by Chlorella sorokiniana and autochthonous microalgae

Carvalho

Santos

Ansilago

et al. 2021

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With the disorderly increase in global environmental problems, the cultivation of aquatic organisms is a promising path for sustainable food production. The quality of water, both at the entrance and exit of the production of aquatic animals, needs to be maintained following the parameters specified by local legislation. This study aimed to investigate the removal of contaminants from fish farming wastewater associated with the production of freshwater microalgae biomass. Six completely randomized treatments were used in triplicate: with the addition of microalgae C. sorokiniana in fish farm wastewater (W+Cs), the addition of C. sorokiniana in wastewater enriched with NPK fertilizing (W+F+Cs) or sugarcane vinasse (W+V+Cs), only wastewater (W), wastewater supplemented with fertilizer (W+F) or vinasse (W+V). The wastewater was used in natura to allow the development of autochthonous microalgae. The microalgae C. sorokiniana grew rapidly in effluents enriched with NPK and vinasse. After 28 days of bioassay, the concentrations of several contaminants in the water were reduced: zinc (20 to 88%), lead (5 to 83%), aluminum (56 to 75%), manganese (56 to 72%), cadmium (9 to 52%), calcium (16 to 24%) and magnesium (12 to 33%). Our results indicated that the production of microalgae biomass can be integrated with the treatment of fish farming effluents to reduce the environmental burden and increase the economic bonus for adopting a sustainable production method. However, our results also indicated the importance of introducing a microalgae strain with high productive performance and supplementing the wastewater to obtain rapid biomass.

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Cultivo da microalga Pseudokirchneriella subcapitata em escala de bancada utilizando meio contaminado com metais pesados

Cited by 7 publications

References 3 publications

Metals bioremediation potential using Pseudokirchneriella subcapitata

Metals bioremediation potential using Pseudokirchneriella subcapitata

Growth of Chlorella vulgaris using wastewater from Nile tilapia (Oreochromis niloticus) farming in a low-salinity biofloc system

Phycoremediation of fish farm wastewater by Chlorella sorokiniana and autochthonous microalgae

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