Filtration Of Creek Water Using A Pall Microfiltration System For The ...

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TEST RESULTS AND DISCUSSION _____________________________________ 1. Pall MF Performance and Operation: For the duration of pilot program, the MF was evaluated under the operational parameters and characteristics summarized in Table III. TABLE III Date Cycle # Interval (days) Membrane Operational Characteristics TMP initial/final (psi) Flux (GFD) Date of CIP Temp Range (C) Feed NTU Recovery (%) 3/30-4/5 1 7 3/7 27.9 0.7-1.2 1-4 96.2 4/5-5/3 28 9/21 32.6 5/3 0.5-4.2 2-8 95.7 5/4-5/18 2 14 5/33 32.6 5/18 (a) 3.0-9.4 6-8 96.4 5/18-5/21 3 16/22 32.6 5/22 8.1-10.7 6-8 96.0 5/22-5/30 3 8 3/8 32.6 8.3-12.8 3-6 96.2 5/30-6/8 10 9/11 39.8 8.8-13.1 3-4 97.1 6/8-6/12 4 12/25 43.4 6/14 (b) 11.7-14.5 2-3 97.2 6/14-6/17 3 12/34 43.4 6/18 8.8-11.6 2-3 97.2 6/19-7/11 4 22 5/18 (c) 39.8 97.0 (a); (b); maintenance clean of 0.5% citric RF flush for 15 min (c); 2-ppm chlorine added to SASRF and RF starting on 7/2 a. Cycle 1 (March 30 to May 3): The cycle started on March 30 with a flux of 27.9 GFD with an initial TMP 3 psid. The TMP increase was a minimal 4-psi after 7 days. The flux was increased to 32.6 GFD on April 5. The run continued until May 3 with a TMP increase to 21 psid. The total run time for cycle 1 was 35 days (Figure II). The feed turbidity was 1 to 8 NTU with a temperature range of 0.7 to 4.2C. The filtrate turbidity was consistently 0.02 to 0.04 NTU with a particle count of < 1 count/ml for particle sizes > 2µm. The pilot was CIP on May 3. b. Cycle 2: (May 4 to May 21): The cycle started on May 4 with a flux of 32.6 GFD with an initial TMP of 5 psid. The cycle continued for 14 days until terminal TMP of 33 psid was reached. A maintenance clean consisting of a 2% citric acid recirculation for 1 hour was then performed. This was successful in reducing the TMP to 16 psid. The microfiltration pilot was restarted and the cycle was continued until May 21 with a final TMP of 22 psid. The total time for cycle 2 was 17 days This report is proprietary to PALL CORPORATION and is furnished in Confidence for the Private use of the intended recipient, for the sole purpose of evaluating PALL technology. It may not be copied nor disclosed, in whole or in part, without the prior express approval of PALL CORPORATION.
(Figure III). The feed turbidity was 6 to 8 NTU with a temperature range of 3.0 to 10.7C. The filtrate turbidity was consistently 0.02 to 0.04 NTU with a particle count of < 1 count/ml for particle sizes > 2u. The microfiltration pilot was CIP on May 22. c. Cycle 3 (May 22 to June 17): Cycle 3 started on May 22 with a flux of 32.6 GFD with an initial TMP of 3 psid. The TMP gradually increased to 8 psid over the next 8 days. On May 30 the flux was increased to 39.6 GFD with an initial TMP of 9 psid. The TMP increased to 11 psid over the next 10 days. On June 8 the flux was increased to 43.6 GFD with an initial TMP of 12 psid. There was a rapid TMP increase to 25 psid in the next 4 days. A maintenance clean consisting of a 2% citric acid recirculation for 1 hour was performed on June 14. This produced a TMP recovery to 12 psid. The cycle was continued for 3 more days until terminal TMP was reached. The total run time for cycle 3 was 25 days (Figure IV). The feed turbidity during cycle 3 was 3 to 6 NTU with a temperature range of 8.3 to 14.5C. The filtrate turbidity was consistently 0.02 to 0.04 NTU with a particle count of < 1 count/ml for particle sizes > 2µm. The microfiltration pilot was CIP on June 18. d. Cycle 4 (June 19 to July 11): Cycle 4 started on June 19 with a flux of 39.6 GFD with an initial TMP of 5 psid. The TMP gradually increased to 25 psid over the next 13 days. On July 2, chemical addition of 2- ppm chlorine in the SASRF and RF cycles was initiated. The immediately reduced the TMP to 20 psid. The cycle continued for another 9 days with the TMP remaining flat at 20 psid. The test period was ended on July 11 without reaching TMP. The total run time for cycle 4 was 22 days (Figure V). The feed turbidity during cycle 4 was 0.2 to 3 NTU with a temperature range of 13 to 19 C. The filtrate turbidity was consistently 0.02 to 0.04 NTU with a particle count of < 1 count/ml for particle sizes > 2 µm. 2. Turbidity Trends: Raw and filtrate turbidity trends can be seen in the previous graphs. The feed turbidity was typically 2 to 3 NTU. During spring runoff, the turbidity was typically 6 to 8 NTU. The filtrate turbidity was consistently 0.02 to 0.04 NTU. 3. Particle Count Trends: Raw and filtrate particle count trends can be seen in Figures VI through IX. The feed counts of greater than 2µm were typically 20,000 to 30,000 counts/ml. The filtrate counts of greater than 2µm were typically less than 1 count/ml. 4. Manganese Results: This report is proprietary to PALL CORPORATION and is furnished in Confidence for the Private use of the intended recipient, for the sole purpose of evaluating PALL technology. It may not be copied nor disclosed, in whole or in part, without the prior express approval of PALL CORPORATION.
Page 1 and 2: July 13, 2001 SLS Report No. 9799SC
Page 3 and 4: BACKGROUND ________________ The Cit
Page 5: Typically when the transmembrane pr
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