The Medium for Intensive Culture of the Diatom Cylindrotheca closterium (Ehrenb.) Reimann et Lewin (Bacillariophyta)

Ryabushko, V. I.; Zheleznova, S. N.; Gevorgiz, R. G.; Бобко, Н. И.; Lelekov, Alexander S.

doi:10.1615/interjalgae.v18.i3.70

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References 14 publications

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“…В работе использовали культуру диатомовой водоросли Cylindrotheca closterium из коллекции культур ФИЦ ИнБЮМ. Культуру C. closterium выращивали на питательной среде RS [16], увеличив концентрацию каждого компонента в 3 раза [5], при постоянной температуре суспензии (20 ± 1)°C, в режиме накопительного культивирования в фотобиореакторах плоскопараллельного типа с рабочим объёмом 2 л, слоем 5 см, при круглосуточном освещении люминесцентными лампами CE-PIL-1-LF 46W/54-765. Средняя облучённость рабочей поверхности фотобиореактора составляла 150 мкмоль квантов•м −2 •с −1 (33 Вт•м −2 ).…”

Section: материал и методыunclassified

Эффективность фиксации углерода в биомассе Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin (Bacillariophyceae) в условиях накопительного культивирования

Gevorgiz¹,

Zheleznova²

2020

mbj

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The carbon utilization efficiency is an important characteristic of the cultivated object. Diatom Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin is known to use carbon from aquatic environment quite effectively, as it has many unique carbonic anhydrases and carbon transporters. However, the carbon fixation efficiency for many types of diatoms in culture is still unknown. When calculating the carbon fixation efficiency, researchers use different terminology and methods, and it leads to significant difficulties when comparing the carbon fixation efficiency in the biomass of various types of microalgae. The aims of this study are: 1) to update terms and definitions used in literature on the basis of modern concepts of carbon fixation in microalgae biomass, as well as absorption of inorganic carbon by microalgae culture; 2) to evaluate the carbon fixation efficiency in the biomass of C. closterium diatom under conditions of cumulative cultivation. C. closterium was grown at a temperature of +20 °C on a nutrient medium RS. During the cultivation, the culture was bubbled with air (1.1 L of air per 1 L of culture per minute). The air temperature at the outlet of the suspension was of +19 °C; the maximum productivity of the culture was of 1.254 g·L−1·day−1. According to the results of the CHN analysis, the proportion of carbon in C. closterium dry biomass was of 23 %. Under the conditions of cumulative cultivation in C. closterium, the carbon fixation efficiency in biomass was of 90 %. Compared with other algae species, C. closterium is characterized by a rather high CO2 fixation efficiency. For example, in green microalga Chlorella protothecoides and Ch. vulgaris, the CO2 fixation efficiency was of 20 % and 55.3 %, respectively; in cyanobacteria Spirulina sp. – of 38 %; in red microalgae Porphyridium purpureum – of 69 %. It was observed that to ensure an increase of 1 g of C. closterium dry biomass per day at a temperature of +19 °C, a minimum of 0.46 L of CO2, or 1132 L of air, should be consumed. Possibly, it is high carbon fixation efficiency, as well as low carbon fraction in C. closterium biomass, that explains the high production indices of this species. Under equal conditions of cultivation in terms of light and carbon availability, the productivity of C. closterium can exceed the productivity of other types of microalgae by 5–10 times. So, while Spirulina sp. productivity reaches 0.2 g·L−1·day−1, C. closterium productivity is of 1.254 g·L−1·day−1.

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Section: материал и методыunclassified

Эффективность фиксации углерода в биомассе Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin (Bacillariophyceae) в условиях накопительного культивирования

Gevorgiz¹,

Zheleznova²

2020

mbj

View full text Add to dashboard Cite

show abstract

The Medium for Intensive Culture of the Diatom Cylindrotheca closterium (Ehrenb.) Reimann et Lewin (Bacillariophyta)

Cited by 1 publication

References 14 publications

Эффективность фиксации углерода в биомассе Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin (Bacillariophyceae) в условиях накопительного культивирования

Эффективность фиксации углерода в биомассе Cylindrotheca closterium (Ehrenberg) Reimann & J. C. Lewin (Bacillariophyceae) в условиях накопительного культивирования

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