Reduction of cake layer by re-aggregation in coagulation-crossflow microfiltration process

2002 ◽  
Vol 2 (5-6) ◽  
pp. 329-336 ◽  
Author(s):  
S. Kim ◽  
S.-H. Cho ◽  
H. Park
Keyword(s):  
Particle Size ◽  
Hollow Fiber ◽  
Shear Force ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Feed Tank ◽  
Charge Neutralization ◽  
Membrane Flux ◽  
Cake Layer ◽  
Crossflow Microfiltration

Cake layer in crossflow microfiltration(CFMF) can be reduced by coagulation, enhancing membrane flux. This is because enlarging particle size by coagulation increases shear-induced diffusivity and the back-transport of rejected particles. However, it is known that the enlarged particles are disaggregated by the shear force of the pump while passing through it. This study looks at the disaggregation in relation to cake layer reduction. Kaolin and polysulfon hollow fiber microfilters are used for experiments. The reduction of cake resistance by coagulation is observed in a range of 17% to 53% at the various coagulation conditions. Particle size analysis results of the experiments show that aggregated particles in feed are completely disaggregated by the pump but re-aggregation of particles occurs in the membrane. This suggests that the re-aggregation of particles is critical to cake reduction and flux enhancement, since the aggregated particles are completely broken. The mechanisms for re-aggregation in the membrane are the same as those for coagulation in the feed tank. Charge neutralization is better for CCFMF than sweep flocculation although it has two drawbacks in operation.

Valuation and Characterization of Actinidin Treatment to Pork

2012 ◽  
Vol 554-556 ◽  
pp. 1258-1261
Author(s):  
Yan Chen ◽  
Qian Zhang ◽  
Xiao Yan Lin ◽  
Xi Yan Liao
Keyword(s):  
Particle Size ◽  
Shear Force ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Microstructure Characteristics ◽  
Soluble Collagen ◽  
Fragmentation Index ◽  
Collagen Protein

The paper studied the effect of kiwifruit protease on tenderization of pork and related characterization has been made, the result indicates that pork marinate with kiwifruit protease may lead the degradation of collagen protein and the change of the myofibril fragmentation index (MFI), particle size, viscosity, Warner-Bratzler shear force, area force versus time (Area F-T) as well as microstructure characteristics. Because of the inconvenience of characterization of MFI and soluble collagen, viscosity, particle size analysis, shear force and area F-T can fast and accurate characteristic the changes of tenderizer of pork after marination with kiwifruit protease.

Particle destabilization for tertiary treatment of municipal wastewater by filtration

1994 ◽  
Vol 30 (9) ◽  
pp. 209-218 ◽  
Author(s):  
M. Ghosh ◽  
A. Amirtharajah ◽  
A. Adin
Keyword(s):  
Particle Size ◽  
Municipal Wastewater ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Secondary Effluent ◽  
Charge Neutralization ◽  
Ph Conditions ◽  
The Difference ◽  
Coagulation Zone ◽  
Total P

Optimization of the chemical pretreatment process prior to tertiary filtration of municipal secondary effluent was studied. Jar tests involving coagulation with alum, flocculation, settling and filtration were conducted on secondary effluent samples and these established the occurrence of two distinct coagulation mechanisms: the mechanism of charge neutralization, and the mechanism of sweep coagulation at different alum dosages and pH conditions. An optimum design region on the alum coagulation diagram also was established where the removals of various wastewater parameters were the highest. This region was bound by alum dosages of 55 to 60 mg/l and pH values of 6 to 6.5. In the above domain, the BOD5, TOC, turbidity, total-P, and the orthophosphate levels of the secondary effluent were reduced by 73%, 57%, 98%, and 99% respectively after tertiary filtration. Particle size analysis of the settled and filtered effluent also was conducted in both the charge neutralization and the sweep coagulation zones. A wide difference was observed in particle sizes between the effluents after settling and after filtration in the charge neutralization zone. In comparison, the difference in particle size between the settled and the filtered effluents was smaller in the sweep coagulation zone.

Effect of homogenisation speed and centrifugation on particle size analysis of beef and the relationship with shear force

Meat Science ◽  
2018 ◽  
Vol 143 ◽  
pp. 219-222 ◽  
Author(s):  
Douglas R.G. Silva ◽  
Benjamin W.B. Holman ◽  
Matthew J. Kerr ◽  
Stephen Morris ◽  
Eduardo M. Ramos ◽  
...  
Keyword(s):  
Particle Size ◽  
Shear Force ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
The Relationship

Particle size analysis of lamb meat: Effect of homogenization speed, comparison with myofibrillar fragmentation index and its relationship with shear force

Meat Science ◽  
2009 ◽  
Vol 82 (4) ◽  
pp. 425-431 ◽  
Author(s):  
L.U. Karumendu ◽  
R. van de Ven ◽  
M.J. Kerr ◽  
M. Lanza ◽  
D.L. Hopkins
Keyword(s):  
Particle Size ◽  
Shear Force ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Lamb Meat ◽  
Fragmentation Index

Particularities of overdetermined linear systems arising in particle size analysis

1992 ◽  
Vol 2 (8) ◽  
pp. 1547-1555
Author(s):  
D. M. Calistru ◽  
R. Mondescu ◽  
I. Baltog
Keyword(s):  
Particle Size ◽  
Linear Systems ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Overdetermined Linear Systems

APSAS; an Automated Particle Size Analysis System

Circular ◽  
1985 ◽  
Author(s):  
Lawrence J. Poppe ◽  
A.H. Eliason ◽  
J.J. Fredericks
Keyword(s):  
Particle Size ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Analysis System
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