Determination of the effect of light and salt concentrations on Aphanocapsa algal population

Ifeanyi, V. O.

doi:10.5897/ajmr10.734

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…The light intensity experiment showed that 6000-7000 Lux was adequate for the algal growth. This observation was in line with [Ifeanyi et al, 2011] who reported that the light with higher intensity can boost the growth of algae. The growth of algae in a reactor can affect the HRAR nutrient removal efficiency [Mirquez et al, 2016], the higher light intensity, the higher of microalgae concentration, resulting in the better removal efficiency.…”

Section: Nitrogen-ammonia Removalsupporting

confidence: 92%

The Effect of Light-Emitting Diodes Illumination Period and Light Intensity on High Rate Algal Reactor System in Laundry Wastewater Treatment

Tangahu¹,

Triatmojo²,

Purwanti³

et al. 2018

J. Ecol. Eng.

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Wastewater that contains high concentration of nutrients can create instability in water ecosystem if left untreated. Laundry wastewater contains nutrients in high concentration. The nutrients that commonly found in laundry wastewater are nitrogen and phosphorus. This study had a purpose to determine the effect of illumination period and light intensity for the removal of Chemical Oxygen Demand (COD), Nitrogen-ammonia (NH 3-N), and phosphate (P) content using Chlorella vulgaris in High Rate Algal Reactor (HRAR) treatment. Variables that used were exposure period of 12 and 24 hours and light intensity of 2000-3000 Lux, 4000-5000 Lux, and 6000-7000 lux. The parameters tested to determine the efficiency of nutrient removal were COD, Nitrogen-ammonia, phosphate and Chlorophyll α to determine the condition of algae development. The results showed that the highest nutrient removal were obtained by the reactor with 24 hours illumination period with light intensity of 6000-7000 Lux that was capable of removing 54.63% of COD, and 22.15% of P. The 12-hour illumination period was better in terms of NH 3-N removal, up to 50.07%. On the basis of the of statistic test result, the illumination period did not significantly influence the removal efficiency of COD, NH 3-N and P indicated by P-value >0.05, while the light intensity significantly affect the removal of COD and NH 3-N showed by P value <0.05.

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Section: Nitrogen-ammonia Removalsupporting

confidence: 92%

The Effect of Light-Emitting Diodes Illumination Period and Light Intensity on High Rate Algal Reactor System in Laundry Wastewater Treatment

Tangahu¹,

Triatmojo²,

Purwanti³

et al. 2018

J. Ecol. Eng.

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“…Although different algae species require different range of light intensities, most of the algae species show maximum growth in moderately high light intensity. Ifeanyi et al 2011 [ 23 ] experimentally proved a rise in growth rate of Aphanocapsa alga cultured under light of 5000 lux which is about 90 μ molm −2 s −1 .…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Feasibility ofMicrocystis aeruginosaas a Feedstock for Bioethanol Production under the Influence of Various Factors

Khan

Lee

Seo

et al. 2016

BioMed Research International

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Microcystis aeruginosa, a freshwater microalga, is capable of producing and accumulating different types of sugars in its biomass which make it a good feedstock for bioethanol production. Present study aims to investigate the effect of different factors increasing growth rate and carbohydrates productivity of M. aeruginosa. MF media (modified BG11 media) and additional ingredients such as aminolevulinic acid (2 mM), lysine (2.28 mM), alanine (1 mM), and Naphthalene acetic acid (1 mM) as cytokine promoted M. aeruginosa growth and sugar contents. Salmonella showed growth-assisting effect on M. aeruginosa. Enhanced growth rate and carbohydrates contents were observed in M. aeruginosa culture grown at 25°C under red LED light of 90 μmolm−2s−1 intensity. More greenish and carbohydrates rich M. aeruginosa biomass was prepared (final OD660 nm = 2.21 and sugar contents 10.39 mM/mL) as compared to control (maximum OD660 nm = 1.4 and sugar contents 3 mM/mL). The final algae biomass was converted to algae juice through a specific pretreatment method. The resulted algae Juice was used as a substrate in fermentation process. Highest yield of bioethanol (50 mM/mL) was detected when Brettanomyces custersainus, Saccharomyces cerevisiae, and Pichia stipitis were used in combinations for fermentation process as compared to their individual fermentation. The results indicated the influence of different factors on the growth rate and carbohydrates productivity of M. aeruginosa and its feasibility as a feedstock for fermentative ethanol production.

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“…In response to UV, recent studies showed that mitochondria and chloroplasts produced reactive oxygen species (ROS) that can damage the cellular components (mitochondrial enzymes, membranes) and inhibit cellular metabolic activity (Nawkar et al 2013). According to Yao et al (2004), different stress conditions, such as salinity, temperature, pH, and nutrients (Takagi 2006, Ifeanyi et al 2011, Devi et al 2012, cause changes in mitochondrial transmembrane potential (MTP), releasing cytochrome complex (cyt c) into the intermembrane mitochondrial space, which activates caspase activity and, subsequently, causes cell death. As reported by Mittler et al (2011), ROS can act as secondary signaling molecules, as well as a cell-damaging agent.…”

Section: Discussionmentioning

confidence: 99%

Comparative study of the effects of salinity and UV radiation on metabolism and morphology of the red macroalga Acanthophora spicifera (Rhodophyta, Ceramiales)

Pereira¹,

Simioni²,

Ouriques³

et al. 2018

Photosynt.

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Increase of harmful radiation to the Earth's surface due to ozone depletion results in higher exposure to harmful ultraviolet-B radiation (UV), while fluctuations in seawater salinity may alter water density, ionic concentration, nutrient uptake, and osmotic pressure. This study evaluated the effects of salinity and UV on metabolism and morphology of Acanthophora spicifera (M.Vahl) Børgesen. Water with 30 and 37 psu [g(salt) kg -1 (sea water)] was used for experiments during 7 d of exposure to UV (3 h per day). We demonstrated that UV treatment predisposed, irrespective of salinity, A. spicifera to a decrease in its growth rate and cell viability, as well as affected its morphological parameters. After exposure to PAR + UVA + UVB (PAB), samples showed structural changes and damage, such as increasing cell wall thickness and chloroplast disruption. Our results indicate that UV led to dramatic metabolic changes and cellular imbalances, but more remarkable changes were seen in samples exposed to high salinity.

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Determination of the effect of light and salt concentrations on Aphanocapsa algal population

Cited by 7 publications

References 13 publications

The Effect of Light-Emitting Diodes Illumination Period and Light Intensity on High Rate Algal Reactor System in Laundry Wastewater Treatment

The Effect of Light-Emitting Diodes Illumination Period and Light Intensity on High Rate Algal Reactor System in Laundry Wastewater Treatment

Enhancing the Feasibility ofMicrocystis aeruginosaas a Feedstock for Bioethanol Production under the Influence of Various Factors

Comparative study of the effects of salinity and UV radiation on metabolism and morphology of the red macroalga Acanthophora spicifera (Rhodophyta, Ceramiales)

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