Studies of the effects of environmental factors on the seasonal change of phytoplankton population in municipal waste water stabilization ponds

Ahmadi, A; Riahi, Hossein; Noori, Mitra

doi:10.1080/02772240500315456

Cited by 16 publications

(19 citation statements)

References 8 publications

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“…This study gains further support from the studies of Roche (1995), Ahmadi et al(2005) and Joseph and Joseph (2002) who reported the green algal forms such as Ulothrix sp. and Spirogyra sp., in the contaminated water bodies.…”

Section: Discussionsupporting

confidence: 57%

Microalgal diversity in relation to the physicochemical parameters of some Industrial sites in Mangalore, South India

Miranda

Krishnakumar

2015

Environ Monit Assess

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This study is undertaken to understand the microalgal species composition, diversity, abundance and their association with the polluted sites of an industrial area. The microalgae and the wastewater samples collected from these sites were preserved and analysed using standard methods. One hundred and eight species of the microalgae, belonging to Cyanophyceae, Chlorophyceae, Euglenophyceae, Bacillariophyceace and Desmidaceae, were identified. Of these, the members of Cyanophyceae formed the dominant flora. It was observed that the family Oscillatoriaceae was the most diverse family. In this family, the most diverse genus was found to be the Oscillatoria, with 13 species. Further, the abundance of Oscillatoria princeps indicated that these species are tolerant to the pollution and therefore considered as the 'marker species' of the habitat. The abundance of the Cyanophyceae in these sites was found to be due to the favourable contents of the oxidizable organic matter and the presence of the nutrients, such as the nitrates and the phosphates, in abundance, with less dissolved oxygen. The lesser percentage of the Bacillariophyceae (14%), and the negligible number of the euglenoids (2%) indicated that the sites were rich in the inorganic pollutants and poor in the organic pollutants. The range of Shannon diversity indices was found between 2.10 and 3.50, while the dominance index was found between 0.03 and 0.14, the species evenness between 0.73 and 0.93 and the Margalef index between 1.8 and 6.3. The diversity indices indicated that there is light to moderate level of pollution in the studied sites, with moderate diversity level. The principal component analysis (PCA) of the physicochemical parameters identified the four possible groups, which were responsible for the data structure, explaining the 74% of the total variance of the data set. In the PCA performed using all the variables, the first principal component showed the positive correlation with the total dissolved solids (TDS), salinity, conductivity, temperature, biochemical oxygen demand (BOD) and the sulphates and the negative correlation with the dissolved oxygen (DO) and Pb2+. The second principal component showed the positive correlation with the pH, dissolved oxygen, chemical oxygen demand (COD), nitrates and phosphates, and the negative correlation with the TDS, salinity, conductivity, temperature and BOD. The canonical correspondence analysis (CCA) showed that there were significant (p<0.05) positive and negative relationships between some of the physicochemical parameters and the microalgal species at these sites. The results showed that Calonies bacillum and Pseudanabaena amphigranulata were in close positive association with the pH, DO, COD, chlorides, nitrates and Cu+2 at the third and the fifth sites; the Navicula sphaerophora, Stigonema minutum and Chlamydomonas sphagnicola were in close positive association with the phosphates and the lead at the first, second and the fifth sites; the Anabaena spiroides, Anabaena constricta, Oscillatoria curvic...

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Section: Discussionsupporting

confidence: 57%

Microalgal diversity in relation to the physicochemical parameters of some Industrial sites in Mangalore, South India

Miranda

Krishnakumar

2015

Environ Monit Assess

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“…A seasonal change in the temperature and light seems to influence directly the variations in the algal species, density, and their photosynthetic activity. Increase in temperature during the premonsoon period (26-30 • C) enhanced the proliferation of algae and photosynthetic oxygenation of pond water; the results obtained were similar as reported by Ahmadi et al (2005).…”

Section: Discussionsupporting

confidence: 93%

Dynamics of industrial waste stabilization pond treatment process

Veeresh

Huddar³

et al. 2009

Environ Monit Assess

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Waste stabilization pond is an artificial ecosystem; its performance is governed by the nature of the biological communities it supports. These are primarily used as secondary effluent treatment plants to polish the effluents. However, they are also used to treat the raw sewage and industrial effluents. In the present study, the functioning of a waste stabilization pond system from an industrial complex located in Goa was taken up. The raw waste released by the industrial complex and the final effluent released from the stabilization ponds were analyzed for pH, dissolved oxygen (DO), biological oxygen demand, phosphate content, chlorophyll content, and algal diversity and density. Also, the activities of the enzymes catalase and phosphatase were measured. The study was carried out for a period of 1 year and the data covering pre-monsoon, monsoon, and post-monsoon seasons are tabulated. The study revealed that DO, chlorophyll content, and algal count were maximum during pre-monsoon when compared to monsoon and post-monsoon. Similarly, maximum enzymatic activity was recorded during pre-monsoon and also maximum removal of biological oxygen demand and phosphate was recorded during this period than in monsoon and post-monsoon.

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“…Changes in species richness, diversity and succession in stabilization ponds depend on organic load, retention time, temperature, pH, oxygen and nutrient concentrations (Hosetti and Frost 1998;Kayombo et al 2002;Zanotelli et al 2002;Ahmadi et al 2005). From the results of this study in batch reactors with dairy wastewater it is clear that, over time, community dynamics and algal biomass were associated with the shift from an anaerobic to an aerobic phase, along with a high percent organic load removal.…”

Section: Discussionmentioning

confidence: 71%

“…Species diversity, seasonal variations and plankton succession in wastewater stabilization ponds have been associated with organic load, day length and zooplankton grazing intensity (Hosetti and Frost 1998;De Paul 2002;Tharavathi and Hosetti 2003;Ahmadi et al 2005). Microalgal density, biomass, and composition are useful indicators of pond status and effluent quality (Hosetti and Frost 1998;Sukias et al 2001;Zanotelli et al 2002;O'Farrill et al 2003).…”

Section: Introductionmentioning

confidence: 97%

Microalgal Dynamics in Batch Reactors for Municipal Wastewater Treatment Containing Dairy Sewage Water

Bernal

Vázquez

Quintal

et al. 2007

Water Air Soil Pollut

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This study investigates the microalgal community dynamics associated with changes in municipal wastewater quality and discharges from the dairy industry in central Veracruz, Mexico, using an experimental stabilization-reactors system. Thirty one species of microalgae were recorded and 15 physicochemical variables were measured daily over 25 days in pretreated water. The biomass of microalgal groups displayed significant negative correlations with bio-

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Studies of the effects of environmental factors on the seasonal change of phytoplankton population in municipal waste water stabilization ponds

Cited by 16 publications

References 8 publications

Microalgal diversity in relation to the physicochemical parameters of some Industrial sites in Mangalore, South India

Microalgal diversity in relation to the physicochemical parameters of some Industrial sites in Mangalore, South India

Dynamics of industrial waste stabilization pond treatment process

Microalgal Dynamics in Batch Reactors for Municipal Wastewater Treatment Containing Dairy Sewage Water

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