Effects of pH on the growth and carbon uptake of marine phytoplankton

Cy, Chen; Durbin, EG

doi:10.3354/meps111083

Cited by 83 publications

(114 citation statements)

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“…Normal growth rate was restored after the pH was lowered by addition of HCl. Similar results were reported by Chen and Durbin, where photosynthetic rate and algal growth was minimal at pH 9.0, but carbon uptake rates were enhanced when the pH was lowered to 8.3 [28].…”

Section: Phsupporting

confidence: 90%

“…One of the most important factors in algal cultivation is pH since it determines the solubility and availability of CO 2 and essential nutrients, and because it can have a significant impact on algal metabolism [28,117]. Due to uptake of inorganic carbon by algae, pH can rise significantly in algal cultures [118].…”

Section: Phmentioning

confidence: 99%

“…Environmental factors such as temperature, light, pH, and nutrients not only affect photosynthesis and growth rate of the algae, but also influence the activity of cellular metabolism and composition. These effects have been identified individually by researchers [25][26][27][28][29][30][31], however, no consolidated review on the effect of these factors on algae is available. Most of the recent reviews have focused on production and processing techniques [11,16,32] with few data on the impacts of environmental and nutritional factors on algal growth rates.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

2013

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Due to significant lipid and carbohydrate production as well as other useful properties such as high production of useful biomolecular substrates (e.g., lipids) and the ability to grow using non-potable water sources, algae are being explored as a potential high-yield feedstock for biofuels production. In both natural and engineered systems, algae can be exposed to a variety of environmental conditions that affect growth rate and cellular composition. With respect to the latter, the amount of carbon fixed in lipids and carbohydrates (e.g., starch) is highly influenced by environmental factors and nutrient availability. Understanding synergistic interactions between multiple environmental variables and nutritional factors is required to develop sustainable high productivity bioalgae systems, which are essential for commercial biofuel production. This article reviews the effects of environmental factors (i.e., temperature, light and pH) and nutrient availability (e.g., carbon, nitrogen, phosphorus, potassium, and trace metals) as well as cross-interactions on the biochemical composition of algae with a special focus on carbon fixation and partitioning of carbon from a biofuels perspective.

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Section: Phsupporting

confidence: 90%

Section: Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

2013

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“…The fraction of TIC depends on the equilibrium pH. CO 2 dissolves into ground water or media in a series of chemical reaction and becomes aqueous CO 2 , carbonic acid, bicarbonate and carbonate as shown in Equations (1) - (4).…”

Section: Introductionmentioning

confidence: 99%

“…(1) (2) (3) (4) The distribution of these inorganic carbon species is pHdependent as shown in Fig.1 Media pH is an important factor that could identify availability of inorganic carbon species for an aquatic photosynthetic organism and is one of crucial parameters influencing growth of algae [4][5][6][7][8][9][10][11][12]. According to Bano and Siddiqui, cyanobacterial species preferred to grow near neutral to alkaline pH and have growth optimum at near neutral [13][14].…”

Section: Introductionmentioning

confidence: 99%

Saturated pH and Total Inorganic Carbon from CO2 Solubility Related to Algal Growth

Bayless¹,

Stuart²

2016

International Advanced Research Journal in Science, Engineering

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Solubility of CO 2 in media formed one-or-more of four forms of inorganic carbon species: carbonic acid, aqueous carbon dioxide, bicarbonate, and carbonate and generated hydrogen ion affecting the medium pH. The saturated TIC and pH were studied using RO water, RO+, GM and GM+ with air (0.038%), 0.5%, 1.0%, 1.5%, 2.0% and 10% CO 2 under atmospheric pressure at temperatures of 25, 35, 45, and 55˚C. Chemical species existing in the media formed additional inorganic carbon species functioning as a buffer, resulting in raising the medium pH. The NaOH boosted the TIC holding capacity of the media and improved the saturated pH. At a specific CO 2 -enriched air and medium, the saturated pH linearly increased with respect to increased temperature, which implied the decreasing of TIC. However, the saturated TIC concentration nonlinearly decreased with respect to temperature. At a specific medium and temperature, the saturated pH nonlinearly decreased with respect to increased CO 2 concentration whereas the TIC concentration linearly increased with respect to increased CO 2 -enriched air. At a specific CO 2 -enriched air, medium and temperature, increasing of TIC concentration decreased the medium pH. The saturated TIC and pH became stable at a same period of time; however, the correlation of the TIC and pH was invalid. The saturated pH can be used to specify the saturation condition of TIC.

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Simple processes for optimized growth and harvest of Ettlia sp. by pH control using CO₂ and light irradiation

Yoo

Kim

et al. 2014

Biotech & Bioengineering

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Microalgae cultures show wide range of pH depending on the availability of light and CO2 for their strain specific photosynthesis. Thus, the modulation of light irradiation and CO2 supply can be applied for the pH control of microalgae cultures. The optimal pH of Ettlia sp. YC001, for phototrophic growth and auto-flocculation was investigated by controlling light irradiation and 10% CO2 supply. Ettlia sp. YC001 showed the highest biomass productivity, 96.7 mg L(-1) d(-1) , at pH 8.5. The flocculating activity of Ettlia sp. YC001 showed a sigmoid pattern with pH increase and was above 70% at pH 10.5. Based on these differentiated optimal pH regimes for the growth and flocculation, an integrated process consisting of cultivation and settling vessels was proposed. The integrated process demonstrated that high flocculation activity of Ettlia sp. YC001 could be achieved in the settling vessel with various hydraulic retention times by only irradiation of light to maintain high pH while maintaining the optimal growth in cultivation vessel with the light irradiation and CO2 supply at pH 8.5. Thus, the proposed strategy for pH control would provide a simple, cost-effective, and flexible design and operation for microalgae cultivation-harvest systems.

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Effects of pH on the growth and carbon uptake of marine phytoplankton

Cited by 83 publications

References 0 publications

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Saturated pH and Total Inorganic Carbon from CO2 Solubility Related to Algal Growth

Simple processes for optimized growth and harvest of Ettlia sp. by pH control using CO₂ and light irradiation

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Effects of pH on the growth and carbon uptake of marine phytoplankton

Cited by 83 publications

References 0 publications

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Effects of Environmental Factors and Nutrient Availability on the Biochemical Composition of Algae for Biofuels Production: A Review

Saturated pH and Total Inorganic Carbon from CO2 Solubility Related to Algal Growth

Simple processes for optimized growth and harvest of Ettlia sp. by pH control using CO2 and light irradiation

Contact Info

Product

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Simple processes for optimized growth and harvest of Ettlia sp. by pH control using CO₂ and light irradiation