Respiration Studies on Chlorella. Ii. Influence of Various Organic Acids on Gas Exchange

Eny, Désiré M.

doi:10.1104/pp.26.2.268

Cited by 29 publications

(7 citation statements)

References 7 publications

(7 reference statements)

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“…It is a common behaviour among species of Chlorophyta. Eny [53] reported that this metabolic pattern can be changed depending on the organic substrate present (e.g. organic acids, glucose), which shows that heterotrophic growth may occur concurrently with autotrophic CO 2 as the sole carbon source.…”

Section: Physicochemical Analysis Of the Wtp-unisc Effluentmentioning

confidence: 98%

Cultivation ofDesmodesmus subspicatusin a tubular photobioreactor for bioremediation and microalgae oil production

Gressler

Bjerk

Schneider

et al. 2013

Environmental Technology

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The microalgae Desmodesmus subspicatus (Chlorophyta) was cultivated in a tubular photobioreactor using effluent from the wastewater treatment plant of the University of Santa Cruz do Sul, Brazil to demonstrate the reactor's operation. The algae's ability to remove nutrients from wastewater and the oleaginous potential of the algae's biomass were also evaluated. Total phosphorus and ammonia nitrogen were measured. The photobioreactor consisted of a system of three acrylic tubes, a reservoir, connections and a CO2 supply. The gas supply was semicontinuous with CO2 added from a cylinder. The culture's growth was estimated from cell numbers counted on a daily basis. Lipid content in the biomass was analysed using gas chromatography. A maximum cell density of 9.11 x 10(6) cellsmL-1 and a dry weight of 234.00 mg L-1 were obtained during cultivation without CO2, and these values rose to 42.48 x 10(6) cells mL-1 and 1277.44 mg L-1, respectively, when CO2 was added to the cultivation. Differences in the quality of the effluent and the presence of CO2 did not result in different lipid profiles. The presence ofpalmitic acid and oleic acid was notable. The average extracted oil content was 18% and 12% for cultivation with and without the input of CO2, respectively.

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Section: Physicochemical Analysis Of the Wtp-unisc Effluentmentioning

confidence: 98%

Cultivation ofDesmodesmus subspicatusin a tubular photobioreactor for bioremediation and microalgae oil production

Gressler

Bjerk

Schneider

et al. 2013

Environmental Technology

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“…The two opposite results that happened to COD indicate two different metabolic pathways, i.e., heterotrophic and autotrophic growth of algae under different culture conditions. Eny [27] found that the metabolic pathway of Chlorella can alter with supply of organic substrates such as organic acids or glucose, which means that they can perform heterotrophic growth besides the common autotrophic one of using CO 2 as the sole carbon source. The organic substances may function directly as an essential organic nutrient [28] or act as an accessory growth factor [29].…”

Section: Algal Growth Curves In the Four Wastewatersmentioning

confidence: 99%

Cultivation of Green Algae Chlorella sp. in Different Wastewaters from Municipal Wastewater Treatment Plant

Wang

Min

et al. 2009

Appl Biochem Biotechnol

918

358

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The objective of this study was to evaluate the growth of green algae Chlorella sp. on wastewaters sampled from four different points of the treatment process flow of a local municipal wastewater treatment plant (MWTP) and how well the algal growth removed nitrogen, phosphorus, chemical oxygen demand (COD), and metal ions from the wastewaters. The four wastewaters were wastewater before primary settling (#1 wastewater), wastewater after primary settling (#2 wastewater), wastewater after activated sludge tank (#3 wastewater), and centrate (#4 wastewater), which is the wastewater generated in sludge centrifuge. The average specific growth rates in the exponential period were 0.412, 0.429, 0.343, and 0.948 day(-1) for wastewaters #1, #2, #3, and #4, respectively. The removal rates of NH4-N were 82.4%, 74.7%, and 78.3% for wastewaters #1, #2, and #4, respectively. For #3 wastewater, 62.5% of NO3-N, the major inorganic nitrogen form, was removed with 6.3-fold of NO2-N generated. From wastewaters #1, #2, and #4, 83.2%, 90.6%, and 85.6% phosphorus and 50.9%, 56.5%, and 83.0% COD were removed, respectively. Only 4.7% was removed in #3 wastewater and the COD in #3 wastewater increased slightly after algal growth, probably due to the excretion of small photosynthetic organic molecules by algae. Metal ions, especially Al, Ca, Fe, Mg, and Mn in centrate, were found to be removed very efficiently. The results of this study suggest that growing algae in nutrient-rich centrate offers a new option of applying algal process in MWTP to manage the nutrient load for the aeration tank to which the centrate is returned, serving the dual roles of nutrient reduction and valuable biofuel feedstock production.

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“…54 60 44 45 30 31 29 31 41 43 Instrument set at 100 been shown (table 6) to stimulate algal growth. The probable involvement of the tricarboxylic acid cycle or its equivalent in the metabolism of ChloreUa has been previously suggested (Eny, 1951;Benson and Calvin, 1950;Calvin et al, 1950;Hutner and Provasoli, 1951). It has been shown (Ratner and Pappas, 1949) that the organic acids, coupled with phosphorylations, supply ATP for both citrulline and arginine synthesis.…”

mentioning

confidence: 82%

The Effect of Arginine on the Nutrition of Chlorella Vulgaris

Arnow¹,

Oleson²,

Williams³

1953

American J of Botany

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Respiration Studies on Chlorella. Ii. Influence of Various Organic Acids on Gas Exchange

Cited by 29 publications

References 7 publications

Cultivation ofDesmodesmus subspicatusin a tubular photobioreactor for bioremediation and microalgae oil production

Cultivation ofDesmodesmus subspicatusin a tubular photobioreactor for bioremediation and microalgae oil production

Cultivation of Green Algae Chlorella sp. in Different Wastewaters from Municipal Wastewater Treatment Plant

The Effect of Arginine on the Nutrition of Chlorella Vulgaris

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