PRAESTOL 853 BC - blychem.mu

1 Stockhausen GmbH & B kerpfad 25 Phone +49-2151-38 01 1/2 Business Unit Water Treatment D-47805 Krefeld Fax +49-2151-38 18 74 PRAESTOL 853 BC Flocculating Agents Product Description Composition: very high molecular, slightly cationic polyelectrolyte based on a cationic acrylamide derivate Supply form: white granular material Charge type: slightly cationic Bulk density: approx. 650 kg/m3 Viscosity ( % in distilled water): approx. 900 Viscosity ( % in distilled water): approx. 90 Viscosity ( % in tap water*): approx. 500 Viscosity ( % in tap water*): approx. 30 pH-value ( % in tap water*): approx. 7 Effective in pH range: 1 - 14 Range of Application and Mode of Action PRAESTOL 853 BC is used mainly for waste water purification, as well as for thickening and dewatering of municipal and industrial sewage sludges (centrifuges, screen belt pres-ses, chamber filter presses).

2 The product is specially suitable for applications where the formed flocs are subjected to high shear. The mode of action of cationic PRAESTOL products is based essentially on ion exchange between the electrical charges along the polymer chain present in aqueous solution and the surface charges on the suspended solid particles. The particle surfaces are destabilized, thus bringing about coagulation or flocculation. Application/Dosage PRAESTOL 853 BC is used as a dilute solution ( to %). For preparation of stock solutions (approx. %) the original product is added to water with uniform stirring. After a dissolving period of approx. 60 minutes (at a temperature of 15 C), the solution is mature and is thus ready for use. Owing to the very variable properties of the sludges to be dewatered, the required addition quantities for a particular application can only be determined by carrying out laboratory tests and industrial trials.

3 Experience has shown that in mechanical sludge dewatering the quantities required in order to achieve a high machine throughput and discharge water free of settle-able materials is between 2 and 6 kg polymer per ton of dry solids in the sludge. When used as a sedimentation accelerator or clarifying agent (in static sedimentation processes), only a few grams of polymer per cubic metre of slurry to be clarified are required. Stockhausen GmbH & B kerpfad 25 Phone +49-2151-38 01 2/2 Business Unit Water Treatment D-47805 Krefeld Fax +49-2151-38 18 74 Working Safety and Accident Prevention In case of spillage/leakage: Caution: Severe skidding hazard in combination with water and moisture. Keep public away from the danger area!

4 Completely remove/reload the dry product. Completely remove and store moist/liquid product with sand or binders. Repeat this procedure as required. Remove minor residue carefully from the road by spraying with a strong water jet. Safety Measures: Prevent dust development in case of dry product! Avoid contact with the eyes! Avoid extended contact with the skin! Rinse off the product after handling/touching! Storage High molecular flocculating agents, such as PRAESTOL 853 BC are all basically sensitive to the effect of moisture, for example in the form of condensation water, water spray or splashes and atmospheric moisture. Contact with water (drops) can cause localized lump formation. The product must therefore be stored in dry, closed containers and protected from moisture.

5 Water hazard class: 2 (self classification) Storage Stability when Stored Correctly Granular material in original packing container: at least 12 months % stock solution in tap water*: at least 2 weeks % ready-to-use solution in tap water*: at least 3 days * Krefeld tap water: approx. 25 dH (degrees of German hardness) pH-value approx. 7, conductivity: approx. 600 S/cm Supply Containers 25 kg sacks on palettes of 625 kg 500 kg bulk bags Business Unit Water Treatment Information given above corresponds to the current status of our knowledge and experience, and is intended to advise without obligation. The given data do not represent specifications! Please adapt all data concerning the use of our products to the conditions existing in your particular application and to your materials.

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