Bench-scale assessment of membrane pre-treatment and seasonal fouling potential variations

2009 ◽  
Vol 8 (1-3) ◽  
pp. 188-200 ◽  
Author(s):  
Ana Esquivel ◽  
Benoit Barbeau ◽  
Christian Bouchard
Keyword(s):  
Bench Scale ◽  
Scale Assessment ◽  
Pre Treatment

Bench-scale assessment of pretreatment to reduce fouling of salt-rejecting membranes

Desalination ◽  
2006 ◽  
Vol 197 (1-3) ◽  
pp. 94-105 ◽  
Author(s):  
Ismail Koyuncu ◽  
Mark R. Wiesner ◽  
Cecile Bele ◽  
Gabriel Coriton ◽  
Malik Djafer ◽  
...  
Keyword(s):  
Bench Scale ◽  
Scale Assessment

Pre-Treatment of Ice Cream Manufacturer's Wastewater: Bench-Scale Results

2007 ◽  
Vol 2007 (9) ◽  
pp. 8106-8113
Author(s):  
Brian E. Reed ◽  
Larry Hentz ◽  
Randy Wirtz ◽  
Bill Oldham ◽  
Dan Ward
Keyword(s):  
Ice Cream ◽  
Bench Scale ◽  
Pre Treatment

Upgrading of a co-digestion plant by implementation of a hydrolysis stage

2011 ◽  
Vol 29 (11) ◽  
pp. 1145-1152 ◽  
Author(s):  
Andreas Blank ◽  
Erhard Hoffmann
Keyword(s):  
Retention Time ◽  
Thermal Hydrolysis ◽  
Batch Experiments ◽  
Kitchen Waste ◽  
Primary Sludge ◽  
Biogas Yield ◽  
Bench Scale ◽  
Second Stage ◽  
Hydrolysis Temperature ◽  
Pre Treatment

An existing co-digestion plant needed to be rehabilitated after a 20 year operational period. This was planned to be done in sequence by halving the digester volume for a period of 1.5 years. The aim of the present study was to improve the performance of the halved co-digestion capacity by implementing an upstream thermal hydrolysis reactor or an ultrasonic pre-treatment of the substrates. The results of the ultrasonic bench-scale batch experiments showed that an ultrasonic pre-treatment of the co-substrates ‘municipal bio-waste suspension and excess activated sludge led to disintegration efficiencies of up to 51%. However, treating kitchen-waste and primary sludge in the same manner was not promising as the disintegration yields were rather low. The results of the hydrolysis bench-scale batch experiments showed that the optimal boundary conditions for the hydrolysis reactor were a hydrolysis temperature of about 42 °C at a retention time of 24 h. The results of the continuous two-stage experiments showed that it was possible to reduce the retention time in the second stage to about 24% and to increase the biogas yield to about 12.8 %, and the methane yield to about 28% as a result of the implementation of the hydrolysis reactor in the existing system. After the rehabilitation of the existing digesters it was possible to raise the daily substrate input to the two existing digesters from 312 to 495 m3 day−1 with an upstream hydrolysis reactor volume of only 474 m3.

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