Effect of light intensity and nutrients supply on microalgae cultivated in urban wastewater: Biomass production, lipids accumulation and settleability characteristics

Iasimone, Floriana; Pánico, Antonio; Felice, Vincenzo De; Fantasma, Francesca; Iorizzi, Maria; Pirozzi, Francesco

doi:10.1016/j.jenvman.2018.07.024

Cited by 110 publications

(46 citation statements)

References 43 publications

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“…It had been demonstrated that microalgae (Scenedesmus sp.) exhibits the highest weight recovery efficiency in combination of low light intensity and nutrient supply condition 14 . The combination of high light illumination and low nitrogen contributes to increased vitamin C content and reduced nitrate content 15 .…”

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confidence: 99%

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Song

Huang

Hao

et al. 2020

Sci Rep

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Light and nutrient are important factors for vegetable production in plant factory or greenhouse. The total 12 treatments which contained the combination of four light intensity (150, 250, 350 and 450 μmol · m −2 · s −1 ) and three nutrient solution concentration (NSC) (1/4, 1/2, 3/4 strength NSC) were established for investigation of lettuce growth and quality in a growth chamber. The combination of light intensity and NSC exhibited significant effects on photosynthetic pigment, nutritional quality, mineral content and antioxidant capacity. That a higher light intensity were readily accessible to higher chlorophyll a/b showed in lettuce of treatment of 350 μmol · m −2 · s −1 × 3/4NSC and 450 μmol · m −2 · s −1 × 1/4NSC. Lower total N contents, higher content of soluble protein, vitamin C, soluble sugar and free amino acid exhibited in lettuce under treatment of 250 and 350 μmol · m −2 · s −1 × 1/4NSC or 3/4NSC. With increasing NSC and LED irradiance, the content of total P and K in lettuce increased and decreased, respectively. The highest and lowest total Ca content were found in treatment of 150 μmol · m −2 · s −1 × 1/4NSC and 450 μmol · m −2 · s −1 × 1/4NSC, respectively, and higher content of total Mg and Zn was observed under 250 μmol m −2 s −1 × 1/4NSC and 150 μmol · m −2 · s −1 × 3/4NSC, respectively. The antioxidant contents generally decreased with increasing NSC level. The higher antioxidant content and capacity occurred in lettuce of 350 μmol · m −2 · s −1 × 1/4NSC treatment. The interaction of 350 μmol · m −2 · s −1 × 1/4NSC might be the optimal condition for lettuce growth in plant factory.Lettuce (Lactuca sativa L.) is one of the most important vegetable in the world, which is main crop in plant factory. The secondary metabolite in vegetable plays key roles for human body health, such as phenolic compound, vitamin A and C, and carotenoid. These compounds have a function on nutrition and health care 1 , which could enhance anti-oxidation ability of human body, and the suppression of inflammatory disease and cancer 2,3 . Nutritional quality of lettuce is affected by light and nutrient solution in plant factory. Light (including light quality, intensity and photoperiod) plays a crucial role in improvement of plant nutrition quality 4,5 . The proper ratio of red and blue light is essential for plant growth and development 6 . Light intensity not only positively regulates lettuce biomass and morphology, but also nutrition quality and activities of anti-oxidative enzymes 7,8 . The content of soluble sugars and ascorbic acid in lettuce increases with increasing light intensity 9 . Different light intensity is required by different plant for nutritional quality and growth. The highest content of lutein, ß-carotene and chlorophyll in leave shows at 335 μmol · m −2 · s −1 for kale, but 200 μmol · m −2 · s −1 for spinach 10 . In ten leafy vegetables (chicory, green lettuce, lamb's lettuce, mizuna, red chard, red lettuce, rocket, spinach, swiss chard, and tatsoi), higher leaf dry matter, content of protein, K,...

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confidence: 99%

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Song

Huang

Hao

et al. 2020

Sci Rep

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“…The optimal condition for microalgae growth will depend on light intensity, wavelength and photoperiod to which the cells are exposed (Iasimone et al, 2018). Light intensity is directly related to the photochemical phase of photosynthesis, when light absorption occurs through the chlorophyll molecules, synthesis of adenosine triphosphate (ATP) and photolysis of water.…”

Section: Light Intensity and Qualitymentioning

confidence: 99%

Biomass accumulation-influencing factors in microalgae farms

Pedruzi

Amorim

Santos

et al. 2020

Rev. bras. eng. agríc. ambient.

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Due to the emergence of large microalgae farms and increased competition in this sector, the search for higher productivity is common. One way to achieve this goal in microalgae production is to optimize the factors that influence their growth during the cultivation stage to increase the accumulation of bio-compounds of interest. In this stage, the factors that most influence are: nutrition, gas diffusion, light intensity and quality and, finally, stirring, which directly affects all other factors. Thus, a review and an evaluation of the influence and importance of stirring were performed in the present study. The nutrients that most influence biomass accumulation are carbon, nitrogen and phosphorus, but their proportion is directly related to the proposed objective for microalgae. In the diffusion of gases, it is essential to supply adequate CO2 for the growth of microalgae, and flue gases can be used. Also, it is necessary to ensure proper removal of photosynthetic O2, which could inhibit microalgae metabolism and slow their growth rate. It is important to provide the appropriate light intensity for photosynthesis, but excess may cause photoinhibition in cultivation. Stirring is of paramount importance to ensure nutrient distribution in the medium, gas diffusion (incorporation of CO2 and removal of O2) and adequate exposure of microalgae to light, reducing the effects of photoinhibition and self-shading.

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“…There are some examples of using algae for cleaning water polluted with heavy metals, petroleum hydrocarbons, pesticides, etc. [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Arthrospira, which is currently widely used in the food industry and in pharmacology [9,10], can be applied also as a phytoremediation agent for cleaning the chemically polluted waters. The cells of Arthrospira contain large amounts of compounds (enzymes, peptides, amino acids, etc.)…”

Section: Introductionmentioning

confidence: 99%

Application of Arthrospira (Spirulina) platensis against Chemical Pollution of Water

Tabagari

Kurashvili

Varazi

et al. 2019

Water

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The basis of phytoremediation technology for cleaning chemically polluted water was developed in the framework of the presented work. This technology is based on the ability of blue-green alga Arthrospira platensis to eliminate different environmental toxicants from water. This technological approach was conducted for the following pollutants: 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT), 2,4,6-trinitrotoluene (TNT), and cesium ions. The effectiveness of the technology was tested in model experiments, which were carried out in glass containers (volume 40 L). In particular, the different concentrations of alga biomass with the aforementioned pollutants were incubated with permanent illumination conditions and air barbotage, at a temperature of 25 °C. The results of the model experiments showed that after two weeks from the start of remediation Arthrospira effectively cleaned artificially polluted waters. Particularly in the case of TNT 56 mg/L concentration, the effect of water remediation was 97%. In the case of DDT 10 mg/L concentration, the degree of cleaning was 90%. Similar results were obtained in the case of 100 mg/L concentration of cesium ions. Thus, the model experiments confirmed that the alga Arthrospira effectively removed tested pollutants from water. That is the basis of phytoremediation technology.

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Effect of light intensity and nutrients supply on microalgae cultivated in urban wastewater: Biomass production, lipids accumulation and settleability characteristics

Cited by 110 publications

References 43 publications

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Nutritional quality, mineral and antioxidant content in lettuce affected by interaction of light intensity and nutrient solution concentration

Biomass accumulation-influencing factors in microalgae farms

Application of Arthrospira (Spirulina) platensis against Chemical Pollution of Water

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