Removal of cyanotoxins by ultrafiltration and nanofiltration

Gijsbertsen-Abrahamse, A.J.; Schmidt, W.; Chorus, Ingrid; Heijman, S.G.J.

doi:10.1016/j.memsci.2005.09.053

Cited by 101 publications

(58 citation statements)

References 10 publications

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“…In one study, hydrogen peroxide was used as an algicide to remove cyanobacteria and cyanotoxins in a stabilization pond, resulting in a significant reduction in their abundance (Barrington et al, 2013). In another study, ultrafiltration and nanofiltration have been used to remove intracellular and dissolved cyanotoxins with 98% and 96% removal efficiency, respectively, in a water reservoir (Gijsbertsen-Abrahamse et al, 2006). Finally, it has been reported that the biodegradation of the secondary metabolites of cyanobacteria can be achieved using a biological filter (Ho et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Structure and dynamics of the phytoplankton community within a maturation pond in a semiarid region

Pastich

Gavazza

Casé³

et al. 2016

Braz. J. Biol.

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In northeastern Brazil, stabilization ponds are very suitable for wastewater treatment because of the relative great land availability and environmental conditions (e.g., high temperature) favorable for microorganism optimal development. However, blooms of potentially toxic cyanobacteria may affect the use of these treatment ponds due to resulting effluent poor quality. The objective of this study was to evaluate the dynamics of phytoplankton communities and the occurrence of cyanobacteria in a maturation pond located immediately after a series of two ponds. Temperature, dissolved oxygen, pH, BOD, N, and P were measured during a period of four months when samples were collected from the surface and the bottom of 7 sampling points distributed inside the pond. The phytoplankton of collected samples was also identified and classified using a conventional optical microscopy. Analysis of variance and Tukey test were used to evaluate the results. The three phytoplankton divisions found (Cyanophyta, Chlorophyta, and Euglenophyta) did not change considerably through surface and bottom. However, they changed greatly over the sampled months; great dominance of Cyanophyta was found at April and October, while Chlorophyta dominated the lagoon in September. Low superficial organic loads (between 78 and 109 kg BOD.ha -1 .d -1 ) and N:P ≤ 10 were the determinant factors that favored the predominance of Cyanophyta. The presence of two potentially toxic species of Cyanophyta, Oscillatoria sp. and Microcystis aeruginosa, indicates that caution is required when considering the final destination of treated effluent and suggests a need to assess the risks and benefits associated with the use of the treatment technology.Keywords: cyanobacteria, ecology, temporal variability, domestic sewage, effluent quality. Estrutura e dinâmica da comunidade fitoplanctônica de uma lagoa de maturação em região semiárida ResumoNo nordeste do Brasil, as lagoas de estabilização são muito adequadas para o tratamento de águas residuárias por causa da disponibilidade relativamente grande de terra e das condições ambientais (por exemplo, altas temperaturas) favoráveis ao melhor desenvolvimento dos microorganismos. Entretanto, florações de cianobactérias potencialmente tóxicas podem afetar o uso dessas lagoas de tratamento, devido à consequente qualidade inferior do efluente. O objetivo deste estudo foi avaliar a dinâmica das comunidades de fitoplâncton e a ocorrência de cianobactérias em uma lagoa de maturação situada após duas lagoas em série. Temperatura, oxigênio dissolvido, pH, DBO, N e P foram medidos durante um período de quatro meses, durante o qual amostras foram coletadas na superfície e fundo em sete pontos de amostragem da lagoa. As comunidades de fitoplâncton das amostras coletadas foram também identificadas e classificadas utilizando-se um microscópio óptico convencional. Para avaliar os resultados utilizou-se a análise de variância e o teste de Tukey. Para as três divisões de fitoplâncton encontradas (Cyanophyta, Chlorophyta e Eugleno...

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Section: Discussionmentioning

confidence: 99%

Structure and dynamics of the phytoplankton community within a maturation pond in a semiarid region

Pastich

Gavazza

Casé³

et al. 2016

Braz. J. Biol.

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“…Two types of low-pressure membrane filtration, MF and UF, have been shown to be effective in removal of intact cyanobacterial cells (Gijsbertsen-Abrahamse, et al, 2006). These membranes removed more than 98% of the cells, but are unable to reject dissolved toxins (Ribau Teixeira, Rosa, 2006b).…”

Section: Membrane Processes -Microfiltration (Mf) Ultrafiltration (Umentioning

confidence: 99%

“…RO and NF membranes could remove dissolved MCs, but removal depends on the membrane pore size and water quality (Gijsbertsen-Abrahamse, et al, 2006). Several variants of MC (RR, LR, YR, and LA) were used in the tests and, in most cases, toxin was removed to below detection limits by the membrane.…”

Section: Membrane Processes -Microfiltration (Mf) Ultrafiltration (Umentioning

confidence: 99%

Cyanotoxins in Serbia and water treatment procedures for their elimination

Tokodi¹,

Drobac²,

Svirčev³

et al. 2012

Geogr Pannon

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“…Some authors refer the occurrence of cell lysis and release of intracellular material into water (Himberg et al, 1989;Hrudey et al, 1999;Pietsch et al 2002) while others report no effect on cell integrity (Chow et al, 1999;Drikas et al, 2001;Ribau Teixeira & Rosa, 2006. Membrane filtration is referred as an attractive technology to reach high removal efficiencies of microalgae (Chow et al, 1997;Mouchet & Bonnélye, 1998;Hudrey et al, 1999;Pietsch et al, 2002;Gijsbertsen-Abrahamse et al, 2006), however studies on its effect on cell integrity are rather scarce. A few studies pointed to a small portion of cells damaged by UF, with 0-2% increase of cell bound microcystin release detected in the permeate (Chow et al, 1997;Gijsbertsen-Abrahamse et al, 2006).…”

mentioning

confidence: 99%

“…Membrane filtration is referred as an attractive technology to reach high removal efficiencies of microalgae (Chow et al, 1997;Mouchet & Bonnélye, 1998;Hudrey et al, 1999;Pietsch et al, 2002;Gijsbertsen-Abrahamse et al, 2006), however studies on its effect on cell integrity are rather scarce. A few studies pointed to a small portion of cells damaged by UF, with 0-2% increase of cell bound microcystin release detected in the permeate (Chow et al, 1997;Gijsbertsen-Abrahamse et al, 2006). Yet, the same studies recommend further investigation, particularly in what concerns the cell sensitivity to shear stress and the toxin release into water, phenomena that are both largely affected by the cyanobacterial cell age.…”

mentioning

confidence: 99%