Stockage intracellulaire des nutriments chez l'algue verte<i>Chlorella sorokiniana</i>Shihira &amp; Krauss

Belkoura, M.; Dauta, A.

doi:10.1051/limn/1994023

Ann. Limnol. - Int. J. Lim.

1994

DOI: 10.1051/limn/1994023

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Stockage intracellulaire des nutriments chez l'algue verteChlorella sorokinianaShihira & Krauss

M. Belkoura¹,

A. Dauta

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Cited by 3 publications

References 32 publications

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Removal of nutrients from hydroponic greenhouse effluent by alkali precipitation and algae cultivation method

Saxena

Bassi

2012

J of Chemical Tech & Biotech

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BACKGROUND: Hydroponic greenhouse effluent has high concentrations of total phosphorus (30–100 mg PO4‐P L−1) and nitrates (200–300 mg NO3‐N L−1). Current technologies for effluent treatment have limitations of performance and high maintenance costs. The goals of this study were to investigate strategies which combine alkali treatment and microalgae cultivation for removal of nutrients from hydroponic greenhouse effluent. RESULTS: Treatment with strong alkali was found to effectively remove 97% of total phophorous especially in the form of phosphate, without affecting the nitrate ion concentration in the greenhouse effluent. After alkali treatment, marine algae Dunaliella salina (UTEX 1644) cultivation on treated hydroponic effluent (pH 7.5) showed > 80% decrease in nitrate content in the effluent within 4 days of cultivation. In the same period, the carotene content of the micro‐algal system was in the range 0.5 ± 0.02 µg mg−1 (dry cell weight) which was 1.5 times higher than in the control. CONCLUSION: This study demonstrated that combination of a conventional alkali precipitation method with a microalgae treatment system is a highly efficient approach for the removal of excess nutrients from hydroponic greenhouse effluent in a short treatment time. The microalgae can provide a source of value in the form of carotene. © 2012 Society of Chemical Industry

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Removal of nutrients from hydroponic greenhouse effluent by alkali precipitation and algae cultivation method

Saxena

Bassi

2012

J of Chemical Tech & Biotech

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Algal sensitivity to nickel toxicity in response to phosphorus starvation

El-Agawany

Kaamoush

2022

Sci Rep

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In all living cells, phosphorus plays an important function in the transport of metabolic energy and as a structural component of nucleotide and phospholipid molecules. Ni2+ is found in industrial water effluent and has the potential to harm aquatic ecosystems. The study was designed to assess the effect of phosphorous-limiting conditions in combination with the absence or presence of different concentrations of nickel on growth, pigment content, photosynthesis, and respiration activities of the studied alga Dunaliella tertiolecta. The EC50 for dissolved nickel was around 15 mg/L. Results obtained showed that, growth and chlorophyll content under phosphorus limiting conditions increased under low concentrations of dissolved nickel. The amount of O2-evolution with phosphorus limiting conditions was lower than those of untreated normal cultures. Lower dissolved nickel concentrations resulted in higher photosynthesis rates in the treated phosphorus-starved cultures than higher concentrations. The degree of response to metal toxicity in phosphorus-starved medium is depending mainly on the concentration of the element and the length of the culturing period and it was less than those in normal control culture containing phosphorus.

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Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique deChlorella sorokinianaShihira & Krauss

Belkoura¹,

Benider²,

Dauta

1997

Ann. Limnol. - Int. J. Lim.

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Dans une optique de valorisation de l'algue verte Chlorella sorokiniana, la composition biochimique de cette espèce a été déterminée en fonction de la température d'incubation, de l'intensité lumineuse et du stade de croissance. A 35°C, sous un éclairement de 140 uE.nr 2 .s _1 , et en phase exponentielle de croissance, les analyses effectuées ont révélé que la biomasse algale était composée d'environ 40 % de protéines, 30 % de glucides et 18 % de lipides (% de la matière sèche des cellules). Les résultats obtenus ont montré également que les teneurs de ces constituants dépendaient étroitement des conditions de culture. Ainsi, il est possible d'orienter le métabolisme cellulaire de cette espèce vers la production du ou des metabolites souhaités, en choisissant les conditions environnementales appropriées et le moment de la récolte de la biomasse algale. Effects of temperature, light intensity and growth phase on the biochemical composition of Chlorella sorokiniana Shihira & KraussKeywords : Chlorella sorokiniana, proteins, carbohydrates, lipids, environmental factors.In view of the valorization of the green alga Chlorella sorokiniana, the biochemical composition of this species was determined as a function of temperature, light intensity and growth phase. At 35°C, under an irradiancé of 140 nE.m^.s 1 , and at the exponential growth phase, the algal biomass contains about 40 % of proteins, 30 % of carbohydrates and 18 % of lipids (% of cellular dry weight). The relative amounts of these compounds are closely dependent on environmental factors and culture age. So, by selecting the suitable environmental conditions and the harvesting time, it is possible to orient the cellular metabolism to the production of the desirable compounds.

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Stockage intracellulaire des nutriments chez l'algue verteChlorella sorokinianaShihira & Krauss

Cited by 3 publications

References 32 publications

Removal of nutrients from hydroponic greenhouse effluent by alkali precipitation and algae cultivation method

Removal of nutrients from hydroponic greenhouse effluent by alkali precipitation and algae cultivation method

Algal sensitivity to nickel toxicity in response to phosphorus starvation

Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique deChlorella sorokinianaShihira & Krauss

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