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.

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).

scholarly journals Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-Treatment

2021 ◽  
Vol 9 (8) ◽  
pp. 1598
Author(s):  
Aigars Lavrinovičs ◽  
Fredrika Murby ◽  
Elīna Zīverte ◽  
Linda Mežule ◽  
Tālis Juhna
Keyword(s):  
Growth Rate ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Reference Conditions ◽  
Phosphorus Uptake ◽  
Molar Ratio ◽  
Biomass Growth ◽  
Activity Increase ◽  
Phosphorus Starvation ◽  
P Content

Four microalgal species, Chlorella vulgaris, Botryococcus braunii, Ankistrodesmus falcatus, and Tetradesmus obliquus were studied for enhanced phosphorus removal from municipal wastewater after their exposure to phosphorus starvation. Microalgae were exposed to phosphorus starvation conditions for three and five days and then used in a batch experiment to purify an effluent from a small WWTP. After 3-day P-starvation, C. vulgaris biomass growth rate increased by 50% and its PO4 removal rate reached >99% within 7 days. B. braunii maintained good biomass growth rate and nutrient removal regardless of the P-starvation. All species showed 2–5 times higher alkaline phosphatase activity increase for P-starved biomass than at the reference conditions, responding to the decline of PO4 concentration in wastewater and biomass poly-P content. The overall efficiency of biomass P-starvation on enhanced phosphorus uptake was found to be dependent on the species, N/P molar ratio in the wastewater, as well as the biomass P content.

scholarly journals GREEN ALGAE CHLORELLA VULGARIS CULTIVATION IN MUNICIPAL WASTEWATER AND BIOMASS COMPOSITION

2017 ◽  
Vol 25 (1) ◽  
pp. 56-63 ◽  
Author(s):  
Petras VENCKUS ◽  
Jolanta KOSTKEVIČIENĖ ◽  
Vida BENDIKIENĖ
Keyword(s):  
Green Algae ◽  
Total Nitrogen ◽  
Chlorella Vulgaris ◽  
Municipal Wastewater ◽  
Biomass Composition ◽  
Lower Amount ◽  
Phosphorus Concentration ◽  
Chemical Compositions ◽  
The Media ◽  
Accumulation Of Lipids

This paper deals with the accumulation of lipids, carbohydrates and proteins in the biomass of the green algae Chlorella vulgaris that is cultivated in the municipal wastewater of Vilnius City. The growth rate of the culture on different chemical compositions of media was investigated. Dependence of lipid, carbohydrate and protein content on total phosphorus and nitrogen initial concentrations in wastewater and removal of nutrients was investigated. Data showed that the higher amount of total nitrogen is the main factor leading to a higher rate of biomass increase. The study showed that Chlorella vulgaris is capable of very efficient nutrient removal from wastewater (up to 86% of total nitrogen and 87% phosphorus was removed). Data showed that there is strong correlation between the initial concentration of nitrogen, and in some cases phosphorus, in the media and content of proteins and carbohydrates in the biomass. A higher amount of nitrogen in the starting media leads to a higher amount of proteins and a lower amount of carbohydrate in the biomass. There was no correlation found between the initial nitrogen or phosphorus concentration in the media and content of lipids in the biomass.

Start-Up of ANAMMOX Bio-Filter for Domestic Secondary Effluent in Ambient Temperature

2013 ◽  
Vol 777 ◽  
pp. 161-167 ◽  
Author(s):  
Di Wu ◽  
Dong Li ◽  
Wei Nan Gao ◽  
Hui Ping Zeng ◽  
Jie Zhang
Keyword(s):  
Growth Rate ◽  
Ambient Temperature ◽  
Doubling Time ◽  
Removal Rate ◽  
Secondary Effluent ◽  
Raw Water ◽  
Phosphorous Removal ◽  
Start Up ◽  
Removal System

The start-up of ANAMMOX bio-filter for domestic secondary effluent was investigated in ambient temperature. The raw water for ANAMMOX bio-filter was the effluent from an anoxic-aerobic (A/O) phosphorous removal system. Nitrification biofilm was successfully transformed into ANAMMOX biofilm during 7 months, with the induction of added nitrite, hydrazine and oxyammonia. The highest TN removal rate reached 6.8 kg/m3/d during start-up, with observed growth rate of 0.0018 h-1 and doubling time of 16.45 d.

Degradation of Cyanobacteria, Microcystis by Microflagellate, Monas guttula

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2173-2176 ◽  
Author(s):  
N. Sugiura ◽  
Y. Inamori ◽  
T. Ouchiyama ◽  
R. Sudo
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Generation Time ◽  
Specific Growth ◽  
Maximum Specific Growth Rate ◽  
Physical Factors ◽  
Biological Oxidation ◽  
Viable Cells ◽  
Short Time ◽  
Maximum Removal

Characteristics of degradation of cyanobacteria, Microcystis aeruginosa, by Masugophota-Monas guttula were examined. Monoxenic M.guttula was isolated from sewage in the biological oxidation facility equipped in Kasumigaura Water Works. M.guttula was able to efficiently degrade viable cells of M.aeruginosain a short time. The removal of cells by M.guttula was 90% at 48 hr cultivation. The specific growth rate (µ) and generation time (tg) of M.guftuia were 4. l day−1 and 4.0 hr, respectively. The maximum specific growth rate(µmax) and saturation coefficient (Ks) of the microbe were 4.4day−1 and 2.4 mg/l with Lineweaver-Burke equation. Effects of physical factors on the removal of M.aeruginosa by M.guttula, pH and temperature were examined. Greater than 80% of removal was obtained at pH 7.0. At 30°C, the maximum removal was over 90% as compared with 20% at 5°C. It was clarified that M.guttula could effectively utilize M.aeruginosa as food, and it was found that pH and temperature were important physical factors to remove the Cyanobacterium M. aeruginosaby microflagellate M.guttula.

scholarly journals Production of Microalgal Biomass at Different Growth Phases to Use as Biofuel Feedstock

2021 ◽  
Vol 47 (2) ◽  
pp. 161-171
Author(s):  
NJ Tarin ◽  
NM Ali ◽  
AS Chamon ◽  
MN Mondol ◽  
MM Rahman ◽  
...  
Keyword(s):  
Growth Rate ◽  
Biomass Production ◽  
Optical Density ◽  
Chlorella Vulgaris ◽  
Doubling Time ◽  
Anabaena Variabilis ◽  
Growth Phases ◽  
Microalgal Biomass ◽  
Biofuel Feedstock ◽  
Optimized Conditions

The growth of microalgae under optimized conditions was determined for assessing their growth rate and biomass production. In this study, the growth of both green algae (Chlamydomonas noctigama and Chlorella vulgaris) and cyanobacteria (Anabaena variabilis and Nostoc spongiaeforme) was measured as optical density. Chlamydomonas noctigama and Chlorella vulgaris showed the doubling time of 9.5 and 8.0 hours, respectively, whereas Anabaena variabilis and Nostoc spongiaeforme showed the doubling time of 14.8 and 16.6 hours, respectively. All the species exhibited the highest growth in terms of biomass at the phase in between stationary and death phases. J. Asiat. Soc. Bangladesh, Sci. 47(2): 161-171, December 2021

Sign in / Sign up

Export Citation Format

Share Document