Aggregate formation and polysaccharide content of Chlorella pyrenoidosa Chick (Chlorophyta) in response to simulated nutrient stress

Yang, Zhou; Liu, Ying; Ge, Juan; Wang, Wei; Chen, Yafen; Montagnes, David J. S.

doi:10.1016/j.biortech.2010.06.022

Cited by 51 publications

(24 citation statements)

References 31 publications

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“…. Importantly, all of these factors were observed to vary with culture age , which corraborates with the observations in this study. Since the physical factors were kept constant, differences in settling with growth phase observed for the two species in this study were most likely caused by differences in cell size, morphology, culture density, surface charge, and exudate production, type, and composition.…”

Section: Discussionsupporting

confidence: 89%

“…Type and amount of algal exudate production is another potential influence on the settling characteristics of algae. Algae can produce dissolved and/or capsular extracellular materials, and the polysaccharide and/or protein content can vary significantly among different species of algae and throughout different growth stages . Yang et al .…”

Section: Discussionmentioning

confidence: 99%

“…Yang et al . determined that exudate production by the microalga Chlorophyta was dependent on nutrient depravation and that the concentration of total, bound (capsular), and soluble polysacharide accumulated with increasing nutrient depravation. Similar differences in microalgal EPS production were identified by Irving , studying the growth of microalgal biofilms in sterile and multi‐species (wastewater) environments.…”

Section: Discussionmentioning

confidence: 99%

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Settling and bioflocculation of two species of algae used in wastewater treatment and algae biomass production

Manheim

Nelson

2013

Env Prog and Sustain Energy

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The settling and bioflocculation of two strains of algae were investigated in the laboratory to provide insights to help improve algae settling in large-scale, algae-based wastewater treatment systems with simultaneous algae biofuel production. Energy-efficient algae harvesting methods are needed for cost-competitive production of biofuels from algae. The use of bacterially derived exudates (bioflocculation) is promising, but its use in high-rate algae pond (HRAP) wastewater systems has not yielded consistently reliable settling. The settling of the algae species Scenedesmus sp. and Chlorella vulgaris was investigated in the laboratory with and without cultures of the bacterium Burkholderia cepacia to investigate environmental effects on the settling of pure algal cultures and to examine possible bioflocculation by bacteria and bacterial exudates. Scenedesmus sp. and C. vulgaris responded in opposite ways to changes in operating conditions such as culture age and bioflocculation. Scenedesmus sp. settled better in later stationary growth stages, while C. vulgaris settled better in its early exponential growth phase. Scenedesmus sp. settling was improved by bioflocculation during early exponential and late stationary growth stages, but not during early stationary growth. Scenedesmus sp. responded better to B. cepacia cells plus filtrate (filtered bacterial broth) than to filtrate addition alone. In contrast, C. vulgaris settling was not improved via bioflocculation with neither the addition of B. cepacia cells nor filtrate at any growth stage. Longer contact time between the algae cells and bioflocculants improved the settling of Scenedesmus sp., but not the settling of C. vulgaris. Observed differences in settling and bioflocculation of the two algae species were attributed to differences in algal cell size and shape, culture density, and exudate type (i.e., capsular versus dissolved EPS). The widely different settling behavior of the two species of algae used in this research may explain the often varied results observed with mixed cultures in algae wastewater ponds. V C 2013 American Institute of Chemical Engineers Environ Prog, 32: 946-954, 2013

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Settling and bioflocculation of two species of algae used in wastewater treatment and algae biomass production

Manheim

Nelson

2013

Env Prog and Sustain Energy

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“…The numbers of cells per particle were calculated by counting at least 600 particles (i.e., unicells, two-celled, four-celled, eight-celled, and the rest) under a light microscope. Growth rate was determined as the slope of logarithm abundance versus time from the samples collected daily [11].…”

Section: Measurement Of Growth Rate and Colony Size Of S Obliquusmentioning

confidence: 99%

“…Scenedesmus, usually dominated by unicells and paired cells, can be induced to form large colonies by Daphnia culture filtrates [6][7][8]. Furthermore, extracellular polysaccharides increase the stickiness of the cell surface and contribute to cell aggregation in algal species [9][10][11]. Extracellular polysaccharides can be stimulated under lower nitrogen conditions [12,13].…”

Section: Introductionmentioning

confidence: 98%

Combined effects of nitrogen levels and Daphnia culture filtrate on colony size of Scenedesmus obliquus

Zhu

Yang

et al. 2015

Algal Research

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Microalgae and Cyanobacteria EPS: Producing Strains, Accumulation and Extraction Strategies, and Valorizations

Laroche

2024

Microalgal Bioengineering

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Aggregate formation and polysaccharide content of Chlorella pyrenoidosa Chick (Chlorophyta) in response to simulated nutrient stress

Cited by 51 publications

References 31 publications

Settling and bioflocculation of two species of algae used in wastewater treatment and algae biomass production

Settling and bioflocculation of two species of algae used in wastewater treatment and algae biomass production

Combined effects of nitrogen levels and Daphnia culture filtrate on colony size of Scenedesmus obliquus

Microalgae and Cyanobacteria EPS: Producing Strains, Accumulation and Extraction Strategies, and Valorizations

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