Combined Depth and Cake Filtration Model Coupled with Flow Simulation for Flat and Pleated Filters

2017 ◽  
Vol 41 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Oleg Iliev ◽  
Ralf Kirsch ◽  
Sebastian Osterroth
Keyword(s):  
Flow Simulation ◽  
Cake Filtration ◽  
Pleated Filters ◽  
Filtration Model

scholarly journals Ultrafiltration membrane process for produced water treatment: experimental and modeling

2013 ◽  
Vol 3 (3) ◽  
pp. 249-259 ◽  
Author(s):  
Ramin Badrnezhad ◽  
Ali Heydari Beni
Keyword(s):  
Produced Water ◽  
Oxygen Demand ◽  
Experimental Results ◽  
Transmembrane Pressure ◽  
Permeation Flux ◽  
Cake Filtration ◽  
Pore Blocking ◽  
Uf Membranes ◽  
Almost All ◽  
Filtration Model

Produced water has been a big issue of water and environmental pollution. In this research, results of an experimental and modeling study on the separation of oil and salts from produced water using a rectangular flat sheet polyacrylonitrile (PAN) ultrafiltration (UF) membrane (nominal pore size of 10 nm) were analyzed. The effects of transmembrane pressure (TMP) (1, 2, 3 and 5 bar) on permeation flux of UF membranes for treatment of produced water were investigated. The results show that the average removal of chemical oxygen demand (COD) and total organic carbon (TOC) during the experiments were 94 and 83%, respectively. The UF membrane showed high potential for application in industry for produced water reusing purposes. The experimental results showed that oil retentions of almost all the membranes were over 99% and oil concentrations in the permeate were below 0.2 mg L–1. In addition, the fouling mechanism involved in UF processing of produced water was investigated by modeling. Experimental results of permeation flux were compared to the results of the fouling models. After the cake filtration model, the intermediate pore blocking model was found to predict the experimental data very well.

Dewatering Sludges Using a Novel Membrane Technology

1992 ◽  
Vol 25 (10) ◽  
pp. 41-54 ◽  
Author(s):  
G. E. Rencken ◽  
C. A. Buckley
Keyword(s):  
Research Work ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Filter Press ◽  
Cake Filtration ◽  
Waste Sludge ◽  
Filtration Cycle ◽  
Cleaning Device ◽  
Cake Removal ◽  
Filtration Model

A novel tubular configured filter press has been developed for the filtration or dewatering of sludges. The unique features of this filter press are:during the cake deposition stage, sludge is fed under pressure into a self-supporting array of horizontal collapsible porous fabric tubes (the cake is deposited on the internal walls of the tubes).during the cake removal stage, sludge is pumped through the array of tubes at a high velocity and the cake is dislodged from the tube walls by means of a roller cleaning device which traverses the length of the array of porous tubes. The dislodged cake, which is in the form of flakes, is simultaneously hydraulically transported out of the tubes, drained and conveyed to a collection hopper. A brief process description of the tubular filter press process is given. A prototype unit was erected at a water treatment plant to dewater clarifier waste sludge. The cake produced by the filtration of the clarifier waste sludge was very compressible. After tube blockage problems were experienced during the filtration cycle on the prototype unit, research was done on the deposition of a compressible cake inside a porous tube. A predictive internal cylindrical compressible cake filtration model was developed. The results of this research work are discussed. The differences between internal cylindrical, external cylindrical and planar compressible cake filtration are highlighted. At various times low cake recoveries (high cake losses) were experienced on the prototype unit. An investigation was consequently conducted into the dislodging of a very compressible cake during the cake removal process. The results of this investigation are discussed.

Application of a pore-blockage?Cake-filtration model to protein fouling during microfiltration

2002 ◽  
Vol 79 (3) ◽  
pp. 260-270 ◽  
Author(s):  
Laura Palacio ◽  
Chia-Chi Ho ◽  
Andrew L. Zydney
Keyword(s):  
Cake Filtration ◽  
Protein Fouling ◽  
Pore Blockage ◽  
Filtration Model

Equivalent Cake Filtration Model

2008 ◽  
Vol 16 (2) ◽  
pp. 214-217 ◽  
Author(s):  
Tan XU ◽  
Qixin ZHU ◽  
Xu CHEN ◽  
Wenping LI
Keyword(s):  
Cake Filtration ◽  
Filtration Model

Membrane foulants and fouling mechanisms in microfiltration and ultrafiltration of an activated sludge effluent

2010 ◽  
Vol 62 (9) ◽  
pp. 1975-1983 ◽  
Author(s):  
S. T. Nguyen ◽  
F. A. Roddick ◽  
J. L. Harris
Keyword(s):  
Activated Sludge ◽  
Humic Substances ◽  
Membrane Fouling ◽  
Cake Filtration ◽  
Flux Enhancement ◽  
Fouling Mechanism ◽  
Membrane Flux ◽  
Filtration Model

Membrane fouling in microfiltration (MF) and ultrafiltration (UF) of an activated sludge (AS) effluent was investigated. It was found that the major membrane foulants were polysaccharides, proteins, polysaccharide-like and protein-like materials and humic substances. MF fouling by the raw effluent was governed by pore adsorption of particles smaller than the pores during the first 30 minutes of filtration and then followed the cake filtration model. UF fouling could be described by the cake filtration model throughout the course of filtration. Coagulation with alum and (poly)aluminium chlorohydrate (ACH) altered the MF fouling mechanism to follow the cake filtration model from the beginning of filtration. The MF and UF flux improvement by coagulation was due to the removal of some of the foulants in the raw AS effluent by the coagulants. The MF flux improvement was greater for alum than for ACH whereas the two coagulants performed equally well in UF. Coagulation also reduced hydraulically irreversible fouling on the membranes and this effect was more prominent in MF than in UF. The unified membrane fouling index (UMFI) was used to quantitatively evaluate the effectiveness of coagulation on membrane flux enhancement.

A combined pore blockage, osmotic pressure, and cake filtration model for crossflow nanofiltration of natural organic matter and inorganic salts

Desalination ◽  
2011 ◽  
Vol 274 (1-3) ◽  
pp. 182-191 ◽  
Author(s):  
Supatpong Mattaraj ◽  
Chalor Jarusutthirak ◽  
Chareopon Charoensuk ◽  
Ratana Jiraratananon
Keyword(s):  
Organic Matter ◽  
Osmotic Pressure ◽  
Natural Organic Matter ◽  
Inorganic Salts ◽  
Cake Filtration ◽  
Pore Blockage ◽  
Filtration Model
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