scholarly journals Effect of Temperature, Light Intensity and pH on the Growth Rate of Chlorella Vulgaris

2011 ◽  
Vol 33 (7) ◽  
pp. 511-515 ◽  
Author(s):  
Hee-Jeong Choi ◽  
Seung-Mok Lee
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Chlorella Vulgaris ◽  
Effect Of Temperature

scholarly journals Effect of Light Intensity and Quality on Growth Rate and Composition of Chlorella vulgaris

Plants ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 31 ◽  
Author(s):  
Maria N. Metsoviti ◽  
George Papapolymerou ◽  
Ioannis T. Karapanagiotidis ◽  
Nikolaos Katsoulas
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Chlorella Vulgaris ◽  
Lipid Content ◽  
Growth Rates ◽  
Solar Irradiance ◽  
White Led ◽  
Microalgal Biomass ◽  
Nm Range ◽  
Effect Of Light

In this research, the effect of solar irradiance on Chlorella vulgaris cultivated in open bioreactors under greenhouse conditions was investigated, as well as of ratio of light intensity in the 420–520 nm range to light in the 580–680 nm range (I420–520/I580–680) and of artificial irradiation provided by red and white LED lamps in a closed flat plate laboratory bioreactor on the growth rate and composition. The increase in solar irradiance led to faster growth rates (μexp) of C. vulgaris under both environmental conditions studied in the greenhouse (in June up to 0.33 d−1 and in September up to 0.29 d−1) and higher lipid content in microalgal biomass (in June up to 25.6% and in September up to 24.7%). In the experiments conducted in the closed bioreactor, as the ratio I420–520/I580–680 increased, the specific growth rate and the biomass, protein and lipid productivities increased as well. Additionally, the increase in light intensity with red and white LED lamps resulted in faster growth rates (the μexp increased up to 0.36 d−1) and higher lipid content (up to 22.2%), while the protein, fiber, ash and moisture content remained relatively constant. Overall, the trend in biomass, lipid, and protein productivities as a function of light intensity was similar in the two systems (greenhouse and bioreactor).

Cultivation of Isochrysis galbana in a Semicontinuous Photobioreactor

2013 ◽  
Vol 699 ◽  
pp. 367-370
Author(s):  
Chun Lin Niu ◽  
Jie Zhang ◽  
Xiao Ping Hu
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Isochrysis Galbana ◽  
Biomass Productivity ◽  
Effect Of Temperature ◽  
Continuous Illumination ◽  
Optimum Temperature ◽  
Photo Bioreactor

The cultivation of microalgae was studied experimentally in a glass semi-continuous photo-bioreactor. The effect of temperature, light intensity and light frequency on the growth rate of Isochrysis galbana was investigated in the work. The results showed that the optimum temperature and light intensity for the higher growth rate were 25°C and 18000 lux, respectively, the biomass productivity was 1.20×10-3g/(L•h). When the light frequency was 20hz,the the growth rate of I.galbana was the highest, which was 18.6% higher than that in continuous illumination..

scholarly journals Effect of some physical factors (Temperature, light intensity) on ability of algae (Scendesmus quadricauda , Chlorella vulgaris) to remove pollutants

2010 ◽  
Vol 7 (2) ◽  
pp. 918-926
Author(s):  
Baghdad Science Journal
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Green Algae ◽  
Chlorella Vulgaris ◽  
Maximum Rate ◽  
Doubling Time ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Physical Factors ◽  
Maximum Removal

The study included studying some of the optimum environmental conditions(temperature ,light intensity ) on the production of several green algae Scendesmus quadricauda and Chlorella vulgaris in a selected culture and municipal wastewater . The study also included the recording of growth rate ,doubling time and removal of phosphate and nitrate , maximum rate was recorded to the growth with minimum in doubling time and maximum removal rate of nitrogen-nitrate and phosor- phosphate in each selected culture and municipal wastewater in each species of green algae at 25 C? and a light intensity 380 µ E / m2 / s.

STUDY OF GROWTH AND N, P CONTENT OF MICROALGAE Chlorella vulgaris CULTIVATED IN DIFFERENT CULTURE MEDIA AND LIGHT INTENSITY

2016 ◽  
Vol 78 (4-2) ◽  
Author(s):  
Dedi Edwin Satriaji ◽  
Muhammad Zainuri ◽  
Ita Widowati
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Specific Growth Rate ◽  
Chlorella Vulgaris ◽  
Specific Growth ◽  
Culture Media ◽  
Algal Growth ◽  
Nitrogen And Phosphorus ◽  
Cell Content ◽  
Media Type

Different light intensity and different media types were used to test their effects on algal growth and biochemical composition of cell content to optimize the growth of algal biomass production. Analysis of the results includes growth calculation of Chlorella vulgaris obtained from 6 d observations for 12 h a day (06:00 am to 06:00 pm) with 3 h breaks in between observation. Laboratory analysis was done at the end of day 5th to determine the content of N, and P. Density of C. vulgaris were influenced by both light intensity and media. Differences media type and light intensity as separated parameters and their interactions significantly (p < 0.05) affected on the growth and nitrogen and phosphor content of C. vulgaris. The highest density of  2 310 × 104 cells · mL–1 was on day 4 with walne media resulting in specific growth rate (µ) of 0.43 per day with a  light intensity of 5 000 lux, and the lowest density of 725 × 104 cells · mL–1 was in day 4 with the NPK media and specific growth rate (µ) 0.25 per day with a light intensity of 4 000 lux. The highest nitrogen and phosphorus content (16.12 mg and 28.19 mg) was obtained from walne medium with a light intensity of 5000 lux, and the lowest (3.43 mg and 2.17 mg) was obtained from NPK with a light intensity of 4 000 lux.

Comparison of copper sulphate pentahydrate growth rates determined by different methods

1990 ◽  
Vol 55 (7) ◽  
pp. 1691-1707 ◽  
Author(s):  
Miloslav Karel ◽  
Jiří Hostomský ◽  
Jaroslav Nývlt ◽  
Axel König
Keyword(s):  
Growth Rate ◽  
Crystal Growth ◽  
Fluidized Bed ◽  
Growth Rates ◽  
Copper Sulphate ◽  
Crystal Growth Rate ◽  
Effect Of Temperature ◽  
Rotating Disc ◽  
Shape Factors ◽  
Data Treatment

Crystal growth rates of copper sulphate pentahydrate (CuSO4.5 H2O) determined by different authors and methods are compared. The methods included in this comparison are: (i) Measurement on a fixed crystal suspended in a streaming solution, (ii) measurement on a rotating disc, (iii) measurement in a fluidized bed, (iv) measurement in an agitated suspension. The comparison involves critical estimation of the supersaturation used in measurements, of shape factors used for data treatment and a correction for the effect of temperature. Conclusions are drawn for the choice of values to be specified when data of crystal growth rate measurements are published.

scholarly journals Effects of light intensity and temperature on Cylindrospermopsis raciborskii (Cyanobacteria) with straight and coiled trichomes: growth rate and morphology

2012 ◽  
Vol 72 (2) ◽  
pp. 343-351 ◽  
Author(s):  
MC. Bittencourt-Oliveira ◽  
B. Buch ◽  
TC. Hereman ◽  
JDT. Arruda-Neto ◽  
AN. Moura ◽  
...  
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Morphological Changes ◽  
Population Control ◽  
Distinct Species ◽  
Cylindrospermopsis Raciborskii ◽  
Climatic Chamber ◽  
Light Intensities ◽  
Different Temperatures ◽  
Lower Temperature

Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju (Ordem Nostocales) is one of the most troublesome bloom-forming species in Brazil. Understanding the population dynamics of the different morphotypes of C. raciborskii (straight and coiled) could assist in the prediction of favourable conditions for the proliferation of this potentially toxin-producing species. The aim of the present study was to assess the effects of two different light intensities and temperatures on the growth rate and morphology of the trichomes of the straight and coiled morphotypes. For such, two non-toxin producing strains of C. raciborskii were used - one with a coiled trichome (ITEP31) and another with a straight trichome (ITEP28). The strains were cultured in BG-11 medium in a climatic chamber under controlled conditions. Two light intensities (30 and 90 µmol.m-2.s-1 ) were combined at temperatures of 21 and 31 °C and the growth rate and morphological changes were analysed. The morphotypes responded differently to the different temperatures and light intensities. Both strains exhibited faster growth velocities when submitted to higher light intensity and temperature. The lower temperature and higher luminosity hampered the development of both strains. Variations in cellular morphology and an absence of akinetes in both strains were related to the lower temperature (21 °C). The coiled morphotype demonstrated considerable phenotype plasticity, changing the morphology of trichome throughout its growth curve. Although molecular analysis does not sustain the separation of the morphotypes as distinct species, their different eco-physiological responses should be considered further knowledge of extreme importance for the population control of these potentially toxic organisms.

scholarly journals Effects of Photosynthetic Activity Radiation (PAR) on Green Mustard Plant Growth (Brassica rapa var. parachinensis L.)

2019 ◽  
Vol 20 (1) ◽  
pp. 19
Author(s):  
Ni Nyoman Ratini ◽  
I Wayan Supardi ◽  
Yuli Nurfadhillah
Keyword(s):  
Growth Rate ◽  
Light Intensity ◽  
Plant Height ◽  
Photosynthetic Activity ◽  
Plant Biomass ◽  
Vegetative Phase ◽  
Active Radiation ◽  
Blue Filter ◽  
Mustard Plant ◽  
Number Of Leaves

A research on the effect of photosynthetic active radiation (PAR) on the growth of green mustard plants has been conducted. The radiation source used is sunlight. Samples have been grouped as a sample which treated by red filter (P1), by orange filter (P2), by purple filter (P3), by green filter (P4), by blue filter (P5) and a sample without filter as a control (P0). Each sample consisted of four plants. The planting was carried out using polybags with compost media. Observations were made from the nursery phase to the slow vegetative phase (day 3rd, when all plants had grown shoots until day 63rd of the harvest). Parameters measured include light intensity, plant height and number of leaves. Measurement is done every three days. Also it measured plant biomass on the last day of observation (63rd day). The results showed that the intensity of each sample had an impact on the harvest. The best growth rate is obtained in P2, both in the nursery phase and fast vegetative phase i.e. 0.119 cm/day and 0.194 cm/day, respectively. While the highest growth rate was obtained in the P3 sample, namely the slow vegetative phase (0.035 cm/day). Overall the best planting results were obtained in P2 samples with plant height of 23.18 cm, number of leaves of 12 strands and plant biomass of 33.56 g.

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