scholarly journals Characterization and Polyculture Analysis of Microalgae Strains Based on Biomass Production and Nutrient Consumption, and Bacterial Community in Municipal Wastewater

Water ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3190
Author(s):  
Weixing Liu ◽  
Dafang Fu ◽  
Ting Pan ◽  
Rajendra Prasad Singh
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Biomass Production ◽  
Bacterial Community Structure ◽  
Production Efficiency ◽  
Municipal Wastewater ◽  
Positive Impact ◽  
Raw Material ◽  
Nitrogen And Phosphorus ◽  
Healthy Growth

Polyculture of microalgae could enhance biomass production. It is crucial to select the proper combination of microbial polyculture which can achieve a positive impact. Ten microalgae suitable for healthy growth in municipal wastewater were selected. Simulated wastewater was used to conduct experiments on the cultivation of single microalgae. Possible combinations of microalgae were analyzed from three aspects: the potential for conversion into biofuels, the consumption of different forms of nitrogen and phosphorus, and the structure of microalgae bacterial communities. From the perspective of converting to biocrude, Leptolyngbya boryana with high protein content was found unsuitable as a biomass raw material. Non-metric multidimensional scale analysis of different forms of nitrogen and phosphorus consumption shows the preference of the microalgae community for the use of nitrogen and phosphorus. By analyzing the bacterial community structure, it was found that microalgae have a significant impact on the bacterial community. We believe that it is more likely to improve the production efficiency of microalgae by establishing the combination of microalgae with high biocrude conversion efficiency, different nitrogen and phosphorus utilization preferences, and large difference in bacterial community structure.

Nutrient availability and organic matter quality shape bacterial community structure in a lake biofilm

2020 ◽  
Vol 85 ◽  
pp. 1-18
Author(s):  
RC Seballos ◽  
KH Wyatt ◽  
RJ Bernot ◽  
SP Brown ◽  
S Chandra ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Heterotrophic Bacteria ◽  
Interspecific Interactions ◽  
Molecular Techniques ◽  
Nitrogen And Phosphorus ◽  
Microbial Composition ◽  
Organic Matter Quality

Heterotrophic bacteria play a key role in ecosystem processes, but little is known about the factors that shape bacterial community structure in aquatic biofilms, especially in lakes. We used molecular techniques (16S rRNA) to evaluate resource controls on biofilm bacterial community structure in an oligotrophic subalpine lake. We manipulated nutrients (nitrogen and phosphorus; NP) and glucose (G) on inorganic (rock) and organic (wood) substrates under light and dark conditions (i.e. with and without autotrophy, respectively) in a full factorial design using nutrient diffusing substrates in situ for 20 d. Distinct patterns of separation in community structure between treatments with nutrients (NP, NP+G) and without nutrients (control, G-only) indicated that community structure was more strongly influenced by nutrients than organic matter irrespective of substrate type or light availability. Further separation in community structure between treatments with nutrients only (NP) and nutrients with glucose (NP+G) on both organic and inorganic substrates indicated that once nutrient limitation was alleviated, organic matter quality played an important role in shaping community structure. Differences in the relative abundance of 6 phyla, 3 classes, and 19 genera among treatments revealed (1) contrasting taxa-specific resource requirements, (2) the influence of interspecific interactions on composition, and (3) the potential for individual taxa to participate in the decomposition of recalcitrant organic matter. Our findings provide insight into the role that nutrients and organic matter quality play in shaping bacterial community structure, which is a critical step in bridging the knowledge gap between microbial composition and ecosystem function within aquatic environments.

Anammox for nitrogen removal from anaerobically pre-treated municipal wastewater: Effect of COD/N ratios on process performance and bacterial community structure

2016 ◽  
Vol 211 ◽  
pp. 257-266 ◽  
Author(s):  
Cíntia Dutra Leal ◽  
Alyne Duarte Pereira ◽  
Fernando Terra Nunes ◽  
Luísa Ornelas Ferreira ◽  
Aline Carolina Cirilo Coelho ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Nitrogen Removal ◽  
Bacterial Community Structure ◽  
Municipal Wastewater ◽  
Process Performance ◽  
Treated Municipal Wastewater
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