Indigenous microalgae biomass cultivation in continuous reactor with anaerobic effluent: effect of dilution rate on productivity, nutrient removal and bioindicators

Pereira, Marcos Vinicius; Dassoler, Aline Figueredo; Antunes, Paulo Wagnner Pereira; Gonçãlves, Ricardo Franci; Cassini, Sérvio Túlio Alves

doi:10.1080/09593330.2018.1549105

Cited by 11 publications

(8 citation statements)

References 39 publications

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“…15 In the continuous growth test a positive correlation was observed between the E. coli LUR and algal density similarly to other studies conducted in eutrophic lake and in a continuous flow PBR fed on effluent from an up-flow anaerobic sludge blanket reactor and operated with different dilution rates. 14,29 As the pH of the PBR was controlled by CO 2 sparging, it could not contribute to the bacterial abatement, while the increase of dissolved oxygen concentration (up to 20 mg L −1 ) and the probable release of secondary metabolites such as such as fatty acids terpenoids, carbohydrates, peptides, polysaccharides and alkaloids by the microalgae might have an effect on the inactivation of E. coli. 16,33,34 Even though these antimicrobial compounds were not analysed in the study, Chlorella sp.…”

Section: Discussionmentioning

confidence: 99%

“…In high-rate ponds, Shelef et al 11 have reported a reduction of 99% in total coliform counts, and similar results were also obtained by El Hamouri et al 12 More recently, the disinfection efficiency, based on the counts of Escherichia coli, was evaluated in a high-rate algal pond fed on septic tank and facultative pond effluents, demonstrating mean log removal values of 1.75 and 2.75, respectively. 13 Nevertheless, the decay rate of E. coli in continuous growth photobioreactors is reported to be strictly related to the dilution rate of the photobioreactor, 14 suggesting that more research on the relationship between operational parameters and disinfection efficiency is also needed.…”

Section: Introductionmentioning

confidence: 99%

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Disinfection and nutrient removal in laboratory‐scale photobioreactors for wastewater tertiary treatment

Bellucci

Marazzi

Naddeo

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Secondary effluent wastewaters still contain resources including water and nutrients that must be safely reused and recovered. In this study, the combined role of microalgae as disinfectant and nutrient removal agent was evaluated for the potential application of a microalgae‐based process as a cost‐effective tertiary treatment. Nutrient removal, biomass productivity and disinfection performances were monitored in laboratory‐scale photobioreactors (batch and continuous) fed on a secondary effluent mixed with a 10% on influent collected at a large municipal wastewater treatment plant where tertiary disinfection is performed by UV treatment. RESULTS In microalgae‐based batch disinfection tests, Escherichia coli counts (0.5 ± 0.7 log CFU 100 mL−1) were comparable to those after traditional UV process (0.7 ± 0.84 log CFU 100 mL−1) and lower than in tests where light was applied without microalgae. In the following continuous test, E. coli counts were reduced by one order of magnitude and the pathogenic strain of E. coli O157:H7/H−, Salmonella spp. and indicators such as Bacteroides spp. and Enterococcus spp. were never detectable in the effluents by molecular tools. Total nitrogen and phosphorus removals reached 93 and 100%, respectively, while the algal biomass productivity of the system averaged 50 ± 30 mg TSS L−1 day−1. CONCLUSIONS The effluents of the photobioreactors reached quality standards appropriate for water reuse. Moreover, nutrients could be recovered through the generation of algal biomass suitable for further valorization. © 2019 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Disinfection and nutrient removal in laboratory‐scale photobioreactors for wastewater tertiary treatment

Bellucci

Marazzi

Naddeo

et al. 2019

J of Chemical Tech & Biotech

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“…fiber membrane filters (GF/C; 1.2 µm pore size) and analyzed for all the parameters within Section 2.2. in order to determine the nutrient and COD removal potential of each strain. The dried biomass was used for the biochemical characterization of lipids, proteins and carbohydrates as in Pereira et al (2018).…”

Section: Cultivation Of the Strains Characterization Of The Biomass mentioning

confidence: 99%

Autochthonous microalgae cultivation with anaerobic effluent: isolation of strains, survivorship, and characterization of the produced biomass

Jesus¹,

Cassini²,

Pereira³

et al. 2019

Rev. ambiente água

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Six Chlorophyta strains were isolated from the effluent of an anaerobic reactor treating municipal wastewater and identified as Desmodesmus sp. L02, Chlorococcum sp. L04, Coccomyxa sp. L05, Chlorella sp. L06, Scenedesmus sp. L08 and Tetradesmus sp. L09. The microalgae strains were cultivated in unsterilized wastewater under laboratory conditions to determine their potential to survive under non-sterile conditions. The strains were also cultivated in sterilized wastewater in order to analyze their nutrient removal potential and characterize the produced biomass. Amongst the isolated microalgae, Chlorella sp. L06 had the highest survivorship percentage (90%) for ten days of culture, whilst Desmodesmus sp. L02 had the lowest, not exceeding 1.8% after 24h of inoculation. The dried biomass of the isolates showed an average of 28.7% of protein, 15.4% of lipids and 14.8% of carbohydrates, with Chlorococcum sp. L04 reaching 29.3% of carbohydrates. In terms of nutrients, nitrogen removal varied from 59.2 to 93%, and phosphorus removal ranged from 79.1 to 95.4%, with Tetradesmus sp. L09 being the most efficient strain.

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“…Isolated colonies were kept in liquid sterile effluent media and on agar effluent plates and incubated with the same conditions as the streak plates. Further information on the isolation, identification and maintenance procedures applied herein can be found in Pereira et al (2018).…”

Section: Microalgae Isolation and Identificationmentioning

confidence: 99%

“…The liquid phase was filtered with glass fiber membrane filters (GF/C; 1.2 µm pore size) and analyzed for all the parameters within Section 2.2. in order to determine the nutrient and COD removal potential of each strain. The dried biomass was used for the biochemical characterization of lipids, proteins and carbohydrates as in Pereira et al (2018).…”

Section: Cultivation Of the Strains Characterization Of The Biomass mentioning

confidence: 99%

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2019

Rev. ambiente água

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With the goal of assessing possible impacts of fish farming in great-volume cage systems on the water quality of a reservoir, the authors provided abiotic data from 72 samples obtained before and after farming site implementation. The figure shows the principal components analysis results for seven limnological variables. The highest dissolved oxygen (OD) concentrations were observed before the fish farm became operational. During the post-production period, the highest phosphorous (PT) and ammonium (NH4) concentrations were observed as well as high conductivity and turbidity values. Authors concluded that fish farming in cage systems located in Solteira Island Reservoir, Brazil, caused significant temporal and sudden spatial changes in water physical and chemical variables. Source: ROSINI, E. F. et al. Water quality in Ponte Pensa Aquaculture Park, Solteira Island Reservoir, SP, Brazil, where fish are cultivated under greatvolume cage system.

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Indigenous microalgae biomass cultivation in continuous reactor with anaerobic effluent: effect of dilution rate on productivity, nutrient removal and bioindicators

Cited by 11 publications

References 39 publications

Disinfection and nutrient removal in laboratory‐scale photobioreactors for wastewater tertiary treatment

Disinfection and nutrient removal in laboratory‐scale photobioreactors for wastewater tertiary treatment

Autochthonous microalgae cultivation with anaerobic effluent: isolation of strains, survivorship, and characterization of the produced biomass

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