Leiknes_subbed.qxp 30/3/09 09:24 Page 111
Cleaning Efficiency of Biodegradable Products on Fouled Ceramic Membranes by Analogue Produced Water
Figure 2: Fouling Evolution for Membrane Pore Sizes
Figure 3: Cleaning by Flushing Fouled Membrane
0.30
0.50
0.45
0.25
0.40
0.20
0.35
0.30
0.15
0.25
0.10
0.1µm
Flux recovery 0.20
T
ransmembrane pressure (bar)
0.2µm
0.05
0.5µm 0.15
0.10
0.00
020406080 100 120
0.05
Operation time (minutes)
0.00
0.1µm 0.2µm 0.5µm
the analogue PW can potentially penetrate the membrane with the larger
Membrane pore size
pore size of 0.5µm and cause pore plugging/blocking, whereas for the
membrane with a pore size of 0.1µm, the solid particles mainly create a The efficiency of the alkaline and acid solutions vary as a function of
layer on the membrane surface. Furthermore, the foulant deposited on membrane pore sizes. The alkaline solution Derquim+ has a higher
the surface is not strongly bound to the membrane surface and thus flux recovery than Ultrasil 115 (92, 90and 68% versus 82, 74 and
cleaning by inducing high shear forces during flushing is helpful. 59% for 0.1, 0.2 and 0.5µm, respectively), and the acid solution
SurfactronCD50 has a higher flux recovery than Ultrasil 73 for all
The effectiveness of a single cleaning step for alkaline and acid membrane pore sizes (82, 85 and 68% versus 85, 80 and 49% for
solutions was investigated. The cleaning agent removes the foulant by 0.1, 0.2 and 0.5µm, respectively). Although the pH of Ultrasil 115 is
displacing foulants from the membrane surface due to their strong higher than that of Derquim+, the surfactant mixture in Derquim+ is
surface adsorption, emulsifying oils and solubilising hydrophobic more efficient since it has a stronger solubilisation effect on the oil on
foulants by incorporating them into surfactant micelles.
10
the membrane surface. The pH of Ultrasil 73 is lower than that of
Freshwater
maker system
Thhe latest reverse osmosis
technology gc ives you an abundant
source oof highigh quality wah quality water oer on bboard
witth a minimum of maintenance.
The freshwater
™ EgdYjXi^dc XVeVX^in d[ [gdb + id -%
tonnes of fresh water/day.
maker that doesn’t ™ EdiVWaZ lViZg [gdb hZV lViZg
need attention
™ Adl ZcZg\n Xdchjbei^dc
™ :Vhn id ^chiVaa VcY deZgViZ
™ B^c^bjb bV^ciZcVcXZ gZfj^gZY
™ :aZXigdc^X bdc^idg^c\ VcY Xdcigda
™ GGZbdiZ VcY iZaZbdc^idg^c\ dei^dc
Hillestad, N-5457 Høylandsbygd, Norway
Tel.: + 47 53 48 35 50, Fax.: + 47 53 48 35 51
post@eidemar.no, www.eidemar.no
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156