A new approach in assessing slurry filterability

Yukseler, Hande; Tosun, İsmaı̇l; Yetış, Ülkü

doi:10.1016/j.memsci.2007.06.053

Cited by 30 publications

(22 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figures 6(a)-(c) at dosage 1:0.5 showed less α in polyester-cotton canvas. These results are similar with the obtained by Yukseler et al (2007). They demonstrated the effect of particle size-pore size interaction with different filter media.…”

Section: Filtration Cellsupporting

confidence: 92%

“…However, in the filter medium paper at dosage 1:0.5 nejayote/diatomite and pressure 98.10 kPa, filtration cake was more porous (Figure 5(c)) than filtration cake obtained with nylon ( Figure 5(d)). In addition, filtration depends not only particle diameter of the solids, dosage and morphology nejayote cake, the filter medium is also decisive in the selection of operating conditions, as mentioned by Yukseler, Tosun, and Yetis (2007).…”

Section: Filtration Cellmentioning

confidence: 99%

See 1 more Smart Citation

Physico-mechanic treatment of nixtamalization by-product (nejayote)

Valderrama-Bravo¹,

Gutiérrez-Cortez²,

Contreras-Padilla³

et al. 2013

CyTA - Journal of Food

View full text Add to dashboard Cite

Nejayote is a nixtamalization waste by-product, and for this reason, in this study, filtration cakes as well as filtrate nejayote were evaluated to select the filter medium and also to establish the operation conditions. The different media used as filters at constant pressure filtrations were polyester-cotton canvas, paper, and nylon. The filtrations showed that polyester-cotton canvas presents lower specific resistance of the cake at all pressure levels and dosages. Calcium content was less in filter medium nylon at pressure 98.10 kPa and dosage 1:0.25 nejayote/ diatomaceous earth. Regarding particle diameter, the nylon and paper filter media have the highest quality filtering at pressure of 63.77 kPa and dosage 1:0.25 nejayote/diatomaceous earth. Therefore, the filtration depends not only on the particle diameter of the solids, dosage and nejayote cake morphology, but that the filter media is also important in the selection of the operation conditions. Keywords: nejayote; filtration; dosage; filter media El nejayote es un subproducto contaminante de la nixtamalización, por lo que en este estudio se obtuvieron tortas de filtración y filtrados que fueron evaluados para seleccionar el medio filtrante y establecer condiciones de filtración. Los medios filtrantes empleados en la filtración a presión constante fueron: lona poliéster algodón, papel y nylon. Las filtraciones evidenciaron que la lona poliéster algodón presenta menor resistencia específica de la torta en todos los niveles de presión y dosificación. El contenido de calcio fue menor en el medio filtrante nylon a la presión 98,10 kPa y dosificación 1:0,25 nejayote/tierra diatomea. Respecto al diámetro de partícula los medios filtrantes nylon y papel dan una mayor calidad de filtrado a la presión 63,77 kPa y dosificación 1:0,25 nejayote/tierra diatomea. En consecuencia, la filtración no sólo depende del diámetro de partícula de los sólidos, dosificación y morfología de la torta de nejayote, también el medio filtrante es determinante en la selección de las condiciones de operación.

show abstract

Section: Filtration Cellsupporting

confidence: 92%

Section: Filtration Cellmentioning

confidence: 99%

Physico-mechanic treatment of nixtamalization by-product (nejayote)

Valderrama-Bravo¹,

Gutiérrez-Cortez²,

Contreras-Padilla³

et al. 2013

CyTA - Journal of Food

View full text Add to dashboard Cite

show abstract

“…11 shows the characteristic curves of blocking filtration laws, which is plotted in the form of d 2 t/dv 2 vs. dt/dv, for different feed concentrations in constant pressure microfiltration of monodisperse PSL with a particle diameter d p of 0.522 μm filtered under the applied pressure p of 196 kPa using the track-etched polycarbonate membrane with a nominal pore size d m of 0.2 μm (Iritani et al, 2015). Each plot results in the distinct negative slope in the initial period of filtration since the filtration behaviors are influenced both by the pore blocking of membrane and by cake formation, as reported by several researchers (Bowen et al, 1995;Iritani et al, 1995;Ho and Zydney, 2000;Hwang et al, 2007;Yukseler et al, 2007). However, as filtration proceeds, cake filtration has a dominant influence on the filtration behaviors and thus the slope of the plot becomes equal to zero.…”

Section: Developments Of Concurrent Combined Modelmentioning

confidence: 68%

“…It should be stressed that several researchers (Bowen et al, 1995;Iritani et al, 1995;Costa et al, 2006;Kim et al, 2007, Yukseler et al, 2007 reported the negative values of n in the later stages of filtration. Fig.…”

Section: Developments Of Consecutive Combined Modelmentioning

confidence: 97%

Developments of Blocking Filtration Model in Membrane Filtration

Iritani

Katagiri

2016

KONA

118

View full text Add to dashboard Cite

Blocking filtration laws consist of four different filtration mechanisms: complete blocking, standard blocking, intermediate blocking, and cake filtration. Blocking filtration laws for describing both the pore blocking and cake formation have been extensively employed over the past several decades to evaluate the increase in filtration resistance with the progress of filtration in the field of classical particulate filtration. In recent years, blocking filtration laws become widely used also in membrane filtration such as microfiltration and ultrafiltration of colloids. This paper gives an overview of the developments of blocking filtration laws and equations under constant pressure and constant rate conditions reported for the filtrate flow of Newtonian and non-Newtonian fluids. The fouling index evaluating the degree of membrane fouling was examined on the basis of the blocking filtration equations. The blocking filtration laws were reexamined to extend the range of their application. Moreover, various combined models developed based on the blocking filtration laws were introduced for describing more rigorously the complicated filtration behaviors controlled by more than one mechanism which occurs successively or simultaneously.

show abstract

“…A sample of sludge is poured into the column, and the filtrate is extracted by capillary suction through the paper, so that a cake is formed on the filter. A better approach to model the filterability of sludge filtration systems was proposed based on adapting models originally defined to describe the fouling of membranes, and corrected for the rapid increase in the slope of t/V versus V when the filter becomes blocked with particles and the flow rate of water slows down [5]. The importance of different floc sizes and structures to explain the variability in the dewaterability of sludge using CST tests was highlighted [1] [6].…”

Section: Introductionmentioning

confidence: 99%

Modelling the Relationship between Sludge Filtration Resistance and Capillary Suction Time

Arimieari¹,

Ademiluyi²

2018

JEP

View full text Add to dashboard Cite

This study modeled the relationship between Sludge Filtration Resistance (SFR) and Capillary Suction Time (CST) using the data generated from different concentrations of CaCl 2 for SFR and CST empirically using the Equation proposed by Christensen et al. (1993). The main purpose of conducting CST and SRF tests at wastewater treatment plants is to save operating costs by evaluating the optimal dose of the sludge conditioner, known as the dose of coagulant that yields the minimal capillary suction time or resistance to filtration. In order to establish a relationship between the SFR with CST, there is a relatively good correlation between CST and SFR. The results showed that the values of CST decreased with increasing CaCl 2 concentration, and a good dewaterability could be obtained at the CaCl 2 dosage of 18 g with the corresponding CST of 5.52 s for 20 mm internal cylinder and 30.84 s for 14.5 mm internal cylinder. The results of SFR tests shown decreased with an increase in CaCl 2 dosage. The optimal CaCl 2 dosage was 18 g and the corresponding SFR was 2.65 × 10 8 N•s/m 5. The results of this study for CST recommend larger diameter cylinder to be used to test heavy sludge because the larger cylinder significantly reduces the variability and the time taken to conduct the CST tests.

show abstract

A new approach in assessing slurry filterability

Cited by 30 publications

References 16 publications

Physico-mechanic treatment of nixtamalization by-product (nejayote)

Physico-mechanic treatment of nixtamalization by-product (nejayote)

Developments of Blocking Filtration Model in Membrane Filtration

Modelling the Relationship between Sludge Filtration Resistance and Capillary Suction Time

Contact Info

Product

Resources

About