Effects of membrane filter material and pore size on turbidity and hazardous element concentrations in soil batch leaching tests

Someya, Masayuki; Higashino, Kazuo; Imoto, Yukari; Sakanakura, Hirofumi; Yasutaka, Tetsuo

doi:10.1016/j.chemosphere.2020.128981

Cited by 15 publications

(11 citation statements)

References 6 publications

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“…These results offer vital evidence that the permeate quality is directly correlated to the membrane pore size. The similar relation between diameters of the MF membranes pore size and filtrate quality has been found in previous studies [79,85]. For instance, Mora et al [85] investigated the MF process of a grape marc extract characterized by the turbidity equal to 640.44 ± 380.32 NTU.…”

Section: Filtration Of Fermentation Broths With Citrobacer Freundii Bacteriasupporting

confidence: 76%

“…Membranes 2021, 11, x FOR PEER REVIEW 10 of 27 as particles with diameters smaller than the pore size of the membrane are more susceptible to being captured by the cake [79]. An apparent decrease in the turbidity of permeate samples during the pressure driven separation processes of fermentation broths has also been reported in several previous studies [5,7,72,80].…”

Section: Filtration Of Fermentation Broths With Citrobacer Freundii Bacteriasupporting

confidence: 54%

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Comparison of Polypropylene and Ceramic Microfiltration Membranes Applied for Separation of 1,3-PD Fermentation Broths and Saccharomyces cerevisiae Yeast Suspensions

Tomczak

Gryta

2021

Membranes

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In recent years, microfiltration (MF) has gained great interest as an excellent technique for clarification of biological suspensions. This paper addresses a direct comparison of efficiency, performance and susceptibility to cleaning of the ceramic and polymeric MF membranes applied for purification of 1,3-propanediol (1,3-PD) fermentation broths and suspensions of yeast Saccharomyces cerevisiae. For this purpose, ceramic, titanium dioxide (TiO2) based membranes and polypropylene (PP) membranes were used. It has been found that both TiO2 and PP membranes provide sterile permeate during filtration of 1,3-PD broths. However, the ceramic membrane, due to the smaller pore diameter, allowed obtaining a better quality permeate. All the membranes used were highly susceptible to fouling with the components of the clarified broths and yeast suspensions. The significant impact of the feed flow velocity and fermentation broth composition on the relative permeate flux has been demonstrated. Suitable cleaning agents with selected concentration and duration of action effectively cleaned the ceramic membrane. In turn, the use of aggressive cleaning solutions led to degradation of the PP membranes matrix. Findings of this study add to a growing body of literature on the use of ceramic and polypropylene MF membranes for the clarification of biological suspensions.

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Section: Filtration Of Fermentation Broths With Citrobacer Freundii Bacteriasupporting

confidence: 76%

Section: Filtration Of Fermentation Broths With Citrobacer Freundii Bacteriasupporting

confidence: 54%

Comparison of Polypropylene and Ceramic Microfiltration Membranes Applied for Separation of 1,3-PD Fermentation Broths and Saccharomyces cerevisiae Yeast Suspensions

Tomczak

Gryta

2021

Membranes

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“…Colloids could have passed through the filter during the liquid-solid separation step, and so may have affected the measured concentrations in the eluate [ 28 , 29 , 30 ]. To confirm the effect of colloids, eluates obtained using a 0.45 μm pore size filter (0.45 MF) were refiltered using a 0.1 μm pore size filter.…”

Section: Resultsmentioning

confidence: 99%

Determining Adsorption Parameters of Potentially Contaminant-Releasing Materials Using Batch Tests with Differing Liquid-Solid Ratios

et al. 2021

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Adsorption parameters such as the distribution coefficient are required to predict the release behavior of contaminants using advection-dispersion models. However, for potentially contaminant-releasing materials (PCMs) such as dredged sludge and coal ash, these parameters cannot be obtained by conventional adsorption tests. This study developed a method to determine adsorption parameters for PCMs from a set of batch tests conducted in parallel as a function of the liquid-solid ratio (LS-parallel test). This LS-parallel test was performed on sandy soil derived from marine sediment using liquid-solid ratios from 1 to 300 L/kg. The water-contact time was also changed from 10 min to 28 d to elucidate the kinetics or equilibrium of contaminants released from the sample. Adsorption parameters were successfully obtained if the substance was under adsorption control. A column percolation test was performed to confirm the effectiveness of the obtained parameters. Good agreements were observed for SO42− and B, but discrepancies remained for other substances such as F− and as suggesting that improvements are necessary in both the LS-parallel test procedure and the advection-dispersion model.

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“…The result indicated that the introduction of PES membrane into activated carbon contributed a significant effect on NTU reduction up to 79%, compared to the individual effect of the activated carbon (Dialynas & Diamadopoulos 2008;Vargas & Lopes 2020). Moreover, these variations in turbidity filtration are related to different pore dimensions of discs and powder (Someya et al 2021), as well as the free space between powder, allowing particulate matters to pass through the filters (Suzuki et al 2020).…”

Section: Turbidity Testmentioning

confidence: 99%

Facile fabrication of low-cost activated carbon bonded polyethersulfone membrane for efficient bacteria and turbidity removal

Prihandana

Sururi

Sriani³

et al. 2021

Water Practice and Technology

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The current research aimed to fabricate a cost-effective activated carbon disc for the bacteria and turbidity removal in contaminated water using polyethersulfone membrane solution as a bonding agent. The mixing compatibility and bonding stability of the blend activated carbon disc were studied with a bonding strength test. The morphology of activated carbon discs was studied by a microscope. The activated carbon discs had a thick dense layer between the powder. Activated carbon discs significantly removed the total coliforms populations (99%) when evaluated against river water whilst removal by the powder was only up to 90%. The turbidity removal efficiency for the activated carbon increased from 29%-79% with the utilization of membrane as the bonding agent in forming the disc. However, the pH of water treated by the activated carbon powder and disc did not change significantly, yet it lied within the pH range of safe drinking water (6.5–7.7). It revealed the important role of PES membranes for the activated carbon discs to improve coliform and turbidity removal in the water, ensuring the quality of water resources.

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Effects of membrane filter material and pore size on turbidity and hazardous element concentrations in soil batch leaching tests

Cited by 15 publications

References 6 publications

Comparison of Polypropylene and Ceramic Microfiltration Membranes Applied for Separation of 1,3-PD Fermentation Broths and Saccharomyces cerevisiae Yeast Suspensions

Comparison of Polypropylene and Ceramic Microfiltration Membranes Applied for Separation of 1,3-PD Fermentation Broths and Saccharomyces cerevisiae Yeast Suspensions

Determining Adsorption Parameters of Potentially Contaminant-Releasing Materials Using Batch Tests with Differing Liquid-Solid Ratios

Facile fabrication of low-cost activated carbon bonded polyethersulfone membrane for efficient bacteria and turbidity removal

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