The use of polyacrylamide should follow the following principles:
1. The granular polyacrylamide flocculant cannot be directly added to the sewage. It must be dissolved in water before use, and its aqueous solution is used to treat sewage.
2. The water used to dissolve the granular polymer should be clean (such as tap water), not sewage. Normal temperature water is sufficient, generally no heating is required. When the water temperature is lower than 5℃, it dissolves very slowly. Increasing the water temperature will speed up the dissolution rate, but above 40°C will accelerate the degradation of the polymer, which will affect the use effect. Generally, tap water is suitable for preparing polymer solutions. Strong acid, strong alkali, and high salt water are not suitable for preparation.
3. The recommended concentration of polymer solution is 0.1%-0.3%, that is, 1g-3g polymer powder is added to 1 liter of water.
