Coupled DEM-MBD-PRM simulations of high-pressure grinding rolls. Part 1: Calibration and validation in pilot-scale

2022 ◽  
Vol 177 ◽  
pp. 107389
Author(s):  
Victor Alfonso Rodriguez ◽  
Gabriel K.P. Barrios ◽  
Gilvandro Bueno ◽  
Luís Marcelo Tavares
Keyword(s):  
High Pressure ◽  
Pilot Scale ◽  
Calibration And Validation

On-Line Monitoring of Nitrate and Nitrite by UV Spectrophotometry in a SBR Process Used for the Treatment of Industrial Wastewaters

2008 ◽  
Vol 6 (1) ◽  
Author(s):  
Jean-Claude Bouvier ◽  
Meriem Bekri ◽  
Djalel Mazouni ◽  
Olivier Schoefs ◽  
Jérôme Harmand ◽  
...  
Keyword(s):  
Pilot Scale ◽  
Dairy Wastewater ◽  
Uv Spectrophotometry ◽  
Major Drawback ◽  
Time Consumption ◽  
Industrial Wastewaters ◽  
Calibration And Validation ◽  
On Line ◽  
Nitrate And Nitrite

The objective is the adaptation of an existing UV spectrophotometer for the on-line monitoring of nitrate, nitrite and soluble COD during cycles of SBRs. An on-line filtering system was also developed in order to provide particle-free fluids to the sensor. The modified UV-spectrophotometer sensor (called "STAC") was implemented into a pilot-scale bioreactor at INRA-Narbonne, treating a semi-synthetic dairy wastewater. After a calibration and validation steps, results obtained during five months have shown that the on-line spectrophotometer sensor was able to efficiently monitor on-line nitrate, nitrite in SBR content. Ranges of detection were between 0 to 40 mg/L for nitrate and 0 to 18 mg/L for nitrite, with an accuracy of about 10 %. The on-line estimation of soluble COD was less efficient. The major drawback was the time-consumption for the cleaning of the homemade on-line filter.

Rejection of organic micropollutants by high pressure membranes: comparison of bench-scale versus single element tests

2006 ◽  
Vol 6 (4) ◽  
pp. 107-116
Author(s):  
T.U. Kim ◽  
C. Bellona ◽  
P. Xu ◽  
J. Drewe ◽  
G. Amy
Keyword(s):  
High Pressure ◽  
Scale Up ◽  
Pilot Scale ◽  
Membrane Properties ◽  
Single Element ◽  
Organic Micropollutants ◽  
Trace Organic Compounds ◽  
Operational Conditions ◽  
Bench Scale ◽  
Trace Organic

There has been considerable information reported on rejection of trace organic compounds from pilot-scale and full-scale experiments with reverse osmosis (RO) and nanofiltration (NF), but this information has limited value in predicting the rejection of these compounds by high-pressure membranes. The goal of this research is to define relationships between compound properties, membrane properties, and operational conditions, e.g. pressure, recovery, affecting trace organic compound rejection, comparing bench-scale recirculation tests and bench-scale single-pass tests. In addition, bench-scale results are compared against single element tests to ascertain scale-up effects.

scholarly journals Predicting the performance uncertainty of a 1-MW pilot-scale carbon capture system after hierarchical laboratory-scale calibration and validation

2017 ◽  
Vol 312 ◽  
pp. 58-66 ◽  
Author(s):  
Zhijie Xu ◽  
Canhai Lai ◽  
Peter William Marcy ◽  
Jean-François Dietiker ◽  
Tingwen Li ◽  
...  
Keyword(s):  
Carbon Capture ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Calibration And Validation ◽  
Scale Calibration ◽  
Performance Uncertainty

A computational model for temperature and sterility distributions in a pilot-scale high-pressure high-temperature process

AIChE Journal ◽  
2007 ◽  
Vol 53 (11) ◽  
pp. 2996-3010 ◽  
Author(s):  
Kai Knoerzer ◽  
Pablo Juliano ◽  
Simon Gladman ◽  
Cornelis Versteeg ◽  
Peter J. Fryer
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Computational Model ◽  
Pilot Scale ◽  
High Temperature Process ◽  
High Pressure High Temperature

scholarly journals A comparative study of enzymatic and Fenton pretreatment applied to a birch kraft pulp used for MFC production in a pilot scale high-pressure homogenizer

TAPPI Journal ◽  
2016 ◽  
Vol 15 (6) ◽  
pp. 375-381
Author(s):  
PIA HELLSTROM ◽  
ANETTE HEIJNESSON-HULTEN ◽  
MAGNUS PAULSSON ◽  
HELENA HAKANSSON ◽  
ULF GERMGARD
Keyword(s):  
High Pressure ◽  
Kraft Pulp ◽  
Pilot Scale ◽  
Enzymatic Method ◽  
Size Fractionation ◽  
Homogenization Treatment ◽  
Betula Verrucosa ◽  
High Pressure Homogenizer ◽  
Birch Kraft Pulp ◽  
Number Of Passes

Microfibrillated cellulose (MFC) was produced in pilot scale from a bleached birch (Betula verrucosa) kraft pulp that was pretreated with either Fenton’s reagent or with a combined mechanical and enzymatic method used at the Centre Technique du Papier (CTP; Grenoble, France). The change in fiber fibrillation during the homogenization treatment was monitored by analyzing the fiber and the fines content, size fractionation, rheological properties and visualization by light- and scanning electron microscopy (SEM). The Fenton pretreatment resulted in MFC suspensions that contained a high amount of small sized elements. After five passes through the highpressure homogenizer, the amount of particles smaller than 20 μm was 37% for the Fenton pretreated MFC compared to 13% for the enzymatically (endoglucanase) pretreated MFC. Altogether, the Fenton pretreatment enabled preparation of MFC with a higher degree of fibrillation after the same number of passes through the high-pressure homogenizer. Another option is to produce MFC of the same amount of fibrillation as after an enzymatic stage, but at significantly lower energy consumption.

Biostimulants obtained after pilot-scale high-pressure homogenization of Scenedesmus sp. grown in pig manure

2020 ◽  
Vol 52 ◽  
pp. 102123
Author(s):  
Elvira Navarro-López ◽  
María del Carmen Cerón-García ◽  
Mercedes López-Rodríguez ◽  
Francisco Gabriel Acién-Fernández ◽  
Emilio Molina-Grima
Keyword(s):  
High Pressure ◽  
Pilot Scale ◽  
Pig Manure ◽  
High Pressure Homogenization

Thermal and Pressure-Assisted Thermal Destruction Kinetics for Spores of Type A Clostridium botulinum and Clostridium sporogenes PA3679

2016 ◽  
Vol 79 (2) ◽  
pp. 253-262 ◽  
Author(s):  
N. RUKMA REDDY ◽  
EDUARDO PATAZCA ◽  
TRAVIS R. MORRISSEY ◽  
GUY E. SKINNER ◽  
VIVIANA LOEZA ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Temperatures ◽  
Clostridium Botulinum ◽  
Pilot Scale ◽  
Inactivation Kinetics ◽  
Clostridium Sporogenes ◽  
Log Reduction ◽  
Pressure Test ◽  
D Values

ABSTRACT The purpose of this study was to determine the inactivation kinetics of the spores of the most resistant proteolytic Clostridium botulinum strains (Giorgio-A and 69-A, as determined from an earlier screening study) and of Clostridium sporogenes PA3679 and to compare the thermal and pressure-assisted thermal resistance of these spores. Spores of these strains were prepared using a biphasic medium method. C. sporogenes PA3679 spores were heat treated before spore preparation. Using laboratory-scale and pilot-scale pressure test systems, spores of Giorgio-A, 69-A, and PA3679 suspended in ACES [N-(2-acetamido)-2-aminoethanesulfonic acid] buffer (pH 7.0) were exposed to various combinations of temperature (93 to 121°C) and pressure (0.1 to 750 MPa) to determine their resistance. More than a 5-log reduction occurred after 3 min at 113°C for spores of Giorgio-A and 69-A and after 5 min at 117°C for spores of PA3679. A combination of high temperatures (93 to 121°C) and pressures yielded greater log reductions of spores of Giorgio-A, 69-A, and PA3679 compared with reduction obtained with high temperatures alone. No survivors from initial levels (>5.0 log CFU) of Giorgio-A and 69-A were detected when processed at a combination of high temperature (117 and 121°C) and high pressure (600 and 750 MPa) for <1 min in a pilot-scale pressure test system. Increasing pressure from 600 to 750 MPa at 117°C decreased the time from 2.7 to 1 min for a >4.5-log reduction of PA3679 spores. Thermal D-values of Giorgio-A, 69-A, and PA3679 spores decreased (i.e., 29.1 to 0.33 min for Giorgio-A, 40.5 to 0.27 min for 69-A, and 335.2 to 2.16 min for PA3679) as the temperature increased from 97 to 117°C. Pressure-assisted thermal D-values of Giorgio-A, 69-A, and PA3679 also decreased as temperature increased from 97 to 121°C at both pressures (600 and 750 MPa) (i.e., 17.19 to 0.15 min for Giorgio-A, 9.58 to 0.15 min for 69-A, and 12.93 to 0.33 min for PA3679 at 600 MPa). At higher temperatures (117 or 121°C), increasing pressure from 600 to 750 MPa had an effect on pressure-assisted thermal D-values of PA3679 (i.e., at 117°C, pressure-assisted thermal D-value decreased from 0.55 to 0.28 min as pressure increased from 600 to 750 MPa), but pressure had no effect on pressure-assisted thermal D-values of Giorgio-A and 69-A. When compared with Giorgio-A and 69-A, PA3679 had higher thermal and pressure-assisted thermal D-values. C. sporogenes PA3679 spores were generally more resistant to combinations of high pressure and high temperature than were the spores of the C. botulinum strains tested in this study.

Sign in / Sign up

Export Citation Format

Share Document