A novel lab-scale batch foaming equipment: The mini-batch

2016 ◽  
Vol 52 (5) ◽  
pp. 533-543 ◽  
Author(s):  
D Tammaro ◽  
V Contaldi ◽  
MG Pastore Carbone ◽  
E Di Maio ◽  
S Iannace
Keyword(s):  
Batch Foaming

Solubility and diffusivity of CO2 and N2 in TPU and their effects on cell nucleation in batch foaming

2019 ◽  
Vol 154 ◽  
pp. 104623 ◽  
Author(s):  
Ruosong Li ◽  
Jung Hyub Lee ◽  
Chongda Wang ◽  
Lun Howe Mark ◽  
Chul B. Park
Keyword(s):  
Cell Nucleation ◽  
Batch Foaming

Nocardia effects in waste activated sludge

1998 ◽  
Vol 38 (2) ◽  
pp. 49-54 ◽  
Author(s):  
Krishna R. Pagilla ◽  
David Jenkins ◽  
Wendell Kido
Keyword(s):  
Activated Sludge ◽  
Foam Stability ◽  
Anaerobic Digester ◽  
Waste Activated Sludge ◽  
Dissolved Air Flotation ◽  
Anaerobic Digesters ◽  
Primary Sludge ◽  
Mixed Liquor ◽  
Dissolved Air ◽  
Batch Foaming

Two effects of Nocardia in waste activated sludge (WAS) were investigated: (i) the influence of WAS in the solids treatment recycle streams on Nocardia persistence in the activated sludge, and (ii) the effect of Nocardia in WAS on anaerobic digester foaming. About 4% of the Nocardia present in the mixed liquor was due to seeding from the WAS solids in the dissolved air flotation thickener recycle stream recycle. Nocardia filaments in WAS at levels of between 104 to 106 intersections/g VSS resulted in Nocardia levels of approximately 104 to 105 intersections/g VSS in anaerobic digesters that treated both WAS and primary sludge. The effect of disinfecting these Nocardia filaments in the WAS with Cl2 was investigated at Cl2 dose ranges of 20-60 mg Cl2/l WAS and 100-200 mg Cl2/l WAS on a lab scale using batch foaming tests to assess success. Chlorination with 20 - 60 mg Cl2/l WAS approximately doubled both sludge foaming potential and foam stability. At Cl2 doses of 100-200 mg Cl2/l WAS, foaming potential was increased almost 10-fold, and foam stability was increased by 2.5 times. These results indicate that chlorination of WAS feed to an anaerobic digester for inactivation of Nocardia should not be practiced.

The effect of expansion conditions on the batch foaming dynamics of St–MMA copolymer

2011 ◽  
Vol 48 (2) ◽  
pp. 125-140 ◽  
Author(s):  
Hamid Reza Azimi ◽  
Mostafa Rezaei ◽  
Farhang Abbasi
Keyword(s):  
Batch Foaming

Synthesis and Characterization of LDPE-Carbon Nanotube Composite Foams

2008 ◽  
Author(s):  
Reza Rizvi ◽  
Hani Naguib
Keyword(s):  
Synthesis And Characterization ◽  
Melt Blending ◽  
Composite Foams ◽  
Nucleation Sites ◽  
Twin Screw ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Nanotube Composite ◽  
Walled Carbon Nanotubes ◽  
Batch Foaming

This study details the synthesis and characterization of composites and composite foams of low-density polyethylene (LDPE) and multi-walled carbon nanotubes (MWCNT). LDPE-MWCNT composites were prepared by melt blending the components in a twin screw compounder and their foams were produced by batch foaming using CO2 as the blowing agent. The composites were characterized for dispersion using SEM and image results indicate good dispersability of MWCNT in LDPE with the formation of a MWCNT network in the LDPE matrix. Thermal and rheological properties of the composites were characterized and results indicate that even a small amount (1 wt.%) of MWCNTs can significantly affect the crystallization kinetics and the rheological behavior. Batch foaming results of the composites depict MWCNTs as heterogeneous nucleation sites for gas bubbles as indicated by the increase in cell density of the composite foams when compared to LDPE foams.

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