SLUDGE DEWATERING - SNF Group

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34 frame filter press dewatering S L U D G E D E W A T E 6.4.3. Polymer efficiency loss: In this case the following parameters must be checked: Polymer preparation. Degradation in time of a cationic polymer is a normal phenomenon (see paragraph on hydrolysis in the brochure"Preparation of Organic Polymers"); there is a loss in viscosity and in performance of the polymer. Checking the polymer solution (age, concentration, pH…) is recommended. Sludge pH. If the sludge to be dewatered has a high pH (10/11), as is likely with the addition of lime, the cationic flocculant will hydrolyse very quickly. This hydrolysis can be easily observed since the flocs will break at the slightest movement. There are two ways to solve this problem: change the sludge pH or choose a polymer less sensistive to hydrolysis like the FLOPAM CB Series or polyDADMACs. Sludge-polymer contact time. Under difficult operating conditions such as a high pH, the cationic polymer is not stable for a long time. Selecting the injection point will become an important factor to the performance. The best conditions are always in-line injection with the polymer dosing regulated by the sludge flow. <strong>SNF</strong> has compiled this hanbook to the best of its knowledge. For any further enquiries please contact <strong>SNF</strong> on www.flocculant.com.
R I N G Notes : 35
Page 1 and 2: SLUDGE DEWATERING
Page 3 and 4: 4 5 6 Belt filter dewatering: . . .
Page 5 and 6: R I N G To simplify, we will not di
Page 7 and 8: R I N G 2Dewatering 2 aids Sludge i
Page 9 and 10: R I N G 2.3. Parameters of the orga
Page 11 and 12: 3Dynamic thickening of sludge is no
Page 13 and 14: R I N G The flocculated sludge flow
Page 15 and 16: R I N G 3.4. Centrifuge: The centri
Page 17 and 18: R I N G 4.2. Lab tests: 4.2.1. Samp
Page 19 and 20: R I N G 4.3. Plant trials: Industri
Page 21 and 22: R I N G 4.4.3. Low cake dryness: It
Page 23 and 24: R I N G Several parameters, specifi
Page 25 and 26: R I N G 5.2.4. Parameters to check
Page 27 and 28: R I N G The polymer flow : The pres
Page 29 and 30: R I N G Filtration phase: Once all
Page 31 and 32: R I N G Selection of the ionic char
Page 33: R I N G The three main operating pr

SLUDGE DEWATERING - SNF Group

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