Production of exopolysaccharides by the cyanobacterium Anabaena sp. BTA992 and application as bioflocculants

doi:10.7324/jabb.2016.40102

Cited by 2 publications

(2 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High flocculation activity observed implies the possibility of industrial applications. However, more research on process conditions is needed until considering large-scale production (Khangembam et al, 2016). Microalgae and cyanobacteria are known to moderate exopolysaccharide and endopolysaccharide creation in response to environmental conditions such as salinity stress, high illuminance, and nitrogen shortage (Sadjeu Tchakouteu , 2015).…”

Section: Discussionmentioning

confidence: 99%

Characterization and identification of some Cyanophyta isolated from sandy soil

Ghazal

Salem

2023

Egyptian Journal of Agricultural Research

View full text Add to dashboard Cite

Three cyanobacterial filamentous, heterocystous isolates (A, B, and C) were isolated from sandy soil collected from the Ismailia Agricultural Research Station (ARC), Ismailia Governorate, Egypt. A polygenic approach was used to characterize these isolates, which included morphology, ultrastructure, and molecular analyses. The morphological analyses for the three strains agree with the molecular data (16S, ITS, and 23S rRNA sequences and phylogeny); the order of our isolates is: Nostocales and family: Nostocaceae, they identified as the following: isolate A: Trichormus variabilis; isolate C: Trichormus sp.) which are filamentous and terminal heterocysts; and isolate B: Nostoc sp.) colonies formed of filamentous heterocysts enclosed in a membrane and gelatinous polysaccharide sheath. Dry weight, pigment content, phytohormones, total nitrogen, total protein, exopolysaccharides, and phosphate dissolving were determined for three strains. The results showed that Trichormus variabilis has the highest chlorophyll a content, Nostoc sp. has the highest carotenoid content, and three strains have almost similar phycocyanin content, while three strains can secrete phytohormones and nitrogen in their medium and dissolve phosphate, with near values in Trichormus variabilis and Trichormus sp. and a slight difference in Nostoc sp. According to the findings of this study, cyanobacterial strains isolated from Ismailia Agricultural Research Station can be used as biofertilizers and nitrogen-fixing fertilizers because of their ability to secrete phytohormones and bioactive compounds and fix air nitrogen in free nitrogen medium.

show abstract

Section: Discussionmentioning

confidence: 99%

Characterization and identification of some Cyanophyta isolated from sandy soil

Ghazal

Salem

2023

Egyptian Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…Indeed, it can immobilize positively charged metal ions with positive charges in the effluent from wastewater due to uronic acid and sulfate's presence on the surface (Freire-Nordi et al, 2005). The exopolysaccharides of Chlorella stigmatophora and Anabaena spiroides exhibit the metal-complexing capacity against Zn 2+ and Cd 2+ and Cu 2+ , Pb 2+ , and Hg 2+ , respectively (Freire-Nordi et al, 2005;Khangembam and Tiwari, 2016). This natural metal chelating property is very beneficial in biological water purification and to maintain ecological balance.…”

Section: Exopolysaccharidesmentioning

confidence: 99%

Valorization of Wastewater Resources Into Biofuel and Value-Added Products Using Microalgal System

et al. 2021

View full text Add to dashboard Cite

Wastewater is not a liability, instead considered as a resource for microbial fermentation and value-added products. Most of the wastewater contains various nutrients like nitrates and phosphates apart from the organic constituents that favor microbial growth. Microalgae are unicellular aquatic organisms and are widely used for wastewater treatment. Various cultivation methods such as open, closed, and integrated have been reported for microalgal cultivation to treat wastewater and resource recovery simultaneously. Microalgal growth is affected by various factors such as sunlight, temperature, pH, and nutrients that affect the growth rate of microalgae. Microalgae can consume urea, phosphates, and metals such as magnesium, zinc, lead, cadmium, arsenic, etc. for their growth and reduces the biochemical oxygen demand (BOD). The microalgal biomass produced during the wastewater treatment can be further used to produce carbon-neutral products such as biofuel, feed, bio-fertilizer, bioplastic, and exopolysaccharides. Integration of wastewater treatment with microalgal bio-refinery not only solves the wastewater treatment problem but also generates revenue and supports a sustainable and circular bio-economy. The present review will highlight the current and advanced methods used to integrate microalgae for the complete reclamation of nutrients from industrial wastewater sources and their utilization for value-added compound production. Furthermore, pertaining challenges are briefly discussed along with the techno-economic analysis of current pilot-scale projects worldwide.

show abstract

Production of exopolysaccharides by the cyanobacterium Anabaena sp. BTA992 and application as bioflocculants

Cited by 2 publications

References 24 publications

Characterization and identification of some Cyanophyta isolated from sandy soil

Characterization and identification of some Cyanophyta isolated from sandy soil

Valorization of Wastewater Resources Into Biofuel and Value-Added Products Using Microalgal System

Contact Info

Product

Resources

About