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| Location | Location I
Sas van Gent, Netherlands | Location II
Dordrecht, Netherlands | Location III
Veendam, Netherlands |
|
| Linear flow velocity | 0.184 m s−1 | 0.202 m s−1 | 0.202 m s−1 |
| Feed pressure | 1 bar | 1 bar | 1 bar |
| Total duration | 8 hours | 24 hours | 6.5 hours |
| Step1 | Circulation with NaOH
60 min; T = 35°C; pH = 12 | Circulation with NaOH
120 min; T = 35°C; pH = 12 | Prerinsing with demi water |
| Step2 | Soaking with NaOH
30 min; T = 35°C; pH = 12 | Soaking (overnight) with NaOH
T = 20°C; pH = 12 | Soaking with demi water
30 min |
| Step3 | Circulation with NaOH
60 min; T = 35°C; pH = 12 | Rinsing with demi water | NaHSO3; pH = 10.5 (adjust pH with NaOH)
60 min; T = 35°C; C = 1–1.5% v/v |
| Step4 | Soaking with NaOH
30 min; T = 35°C; pH = 12 | Circulation with Divos 2
90 min; T = 35°C; pH = 1.6 | Soaking with NaHSO3
120 min; T = 20°C; pH = 10.5 |
| Step5 | Circulation with NaOH
60 min; T = 35°C; pH = 12 | Final rinsing with demi water | Rinsing with demi water |
| Step6 | Soaking with NaOH
30 min; T = 35°C; pH = 12 | | Divos 2
30 min; T = 35°C; pH = 2.5 |
| Step7 | Rinsing with demi water | | Soaking with Divos 2
60 min; T = 20°C; pH = 2.5 |
| Step8 | Circulation with HCl
60 min; T = 35°C; pH = 2.1 | | Final rinsing with demi water |
| Step9 | Soaking with HCl
30 min; T = 35°C; pH = 2.1 | | |
| Step10 | Circulation with HCl
60 min; T = 35°C; pH = 2.1 | | |
| Step11 | Soaking with HCl
30 min; T = 35°C; pH = 2.1 | | |
| Step12 | Final rinsing with demi water | | |
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