Plankton biomass in secondary ponds treating piggery waste

Barthel, Lígia; Oliveira, P. A. V. de; Costa, Rejane Helena Ribeiro da

doi:10.1590/s1516-89132008000600025

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…3 shows that even though the HRP2 operated with 30% of blocking, this pond presented the highest mean density of individuals (701,065 ind mL À1 ); on the other hand, the HRP3, with 80% of blocking, presented the lowest mean density of organisms throughout the sampling period (663,167.5 ind mL À1 ). Barthel et al (2008), studying a water hyacinth pond, observed that the hyacinth's shadow rendered the phytoplankton proliferation difficult, and the algae grazing occurrence through the zooplankton, causing lower algae density during all the nine months of monitoring.…”

Section: Composition Of the Culture Mediummentioning

confidence: 99%

“…The genera Chlorella and Desmodesmus were more frequent in environments with high organic matter pollution. Barthel et al (2008) stated that Chlorella sp. was the dominant species during the entire sampling period (February-October) in their HRPs treating piggery waste, located in the south of Brazil.…”

Section: Composition Of the Phytoplankton Communitymentioning

confidence: 99%

“…Despite its importance as a renewable energy source and the wide research on HRPs for wastewater treatment, the phytoplankton community in these systems is very little studied. There are few studies which exclusively address their interaction and behavior according to the characteristics of the culture medium and environmental variables (but see Barthel et al, 2008;Canovas et al, 1996;. Therefore, the objective of this study is to evaluate how solar radiation influences the phytoplankton community in HRPs.…”

Section: Introductionmentioning

confidence: 99%

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Algae/bacteria consortium in high rate ponds: Influence of solar radiation on the phytoplankton community

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Calijuri

Couto

et al. 2015

Ecological Engineering

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Using multivariate statistical tools, the composition of the phytoplankton community was related to the characteristics of the domestic sewage used as culture medium in three high rate ponds (HRPs) submitted to different solar radiation levels. A total of 32 genera of phytoplankton were identified in the ponds; the class Chlorophyceae was the most abundant during the entire sampling period, with a larger number of individuals of the genus Desmodesmus in the summer and fall, and of the genus Chlorella in the winter and spring. The lowest occurrence of phytoplankton was observed in the fall, with behavior similar to the evolution of solar radiation throughout the year. Blocking over 30% of the solar radiation allowed for less variability of the phytoplankton community and favored the growth of biomass with higher density of individuals, as well as higher concentrations of chlorophyll-a and dissolved oxygen. On the other hand, the pond with 80% of shading presented the lowest mean density of organisms; from the perspective of wastewater treatment, however, it can be considered the most efficient in terms of organic matter and nutrient removal. According to the regression analysis, the algal biomass in HRPs can be maximized mostly if we consider the positive effect of carbon and phosphorus and the limiting effect of nitrogen and non-biodegradable organic load. For the conditions evaluated in this study, the photoinhibition phenomenon was not observed. Other aspects such as competition with other microorganisms for space and nutrients, or predation by zooplankton, seemed to be more significant for the growth and development of algal biomass. 2015 Elsevier B.V. All rights reserved.

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Section: Composition Of the Culture Mediummentioning

confidence: 99%

Section: Composition Of the Phytoplankton Communitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Algae/bacteria consortium in high rate ponds: Influence of solar radiation on the phytoplankton community

Assemany

Calijuri

Couto

et al. 2015

Ecological Engineering

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show abstract

“…The little that is known about the community composition of WSP systems is based on microscopy studies, such as those by El-Deeb Ghazy et al (2008), Barthel et al (2008), Shanthala et al (2009) and Mara (1997). Microscopy though able to give an overview of the algal groups present is unsuitable when a large number of samples require processing as it; i) relies on the expertise of well trained personnel, ii) is limited to the presence of morphological markers (which many microalgal species lack), iii) is not accurate down to species level, and iv) is very time consuming.…”

Section: Introductionmentioning

confidence: 99%