How to quickly and accurately select the right flocculant? Before treating sewage, the type of sewage needs to be considered first, so that it is more accurate and faster when choosing a flocculant. So, when we choose the flocculation dosage form number, what aspects can we consider?
Sludge is a product of sewage treatment. We should understand the source, nature, composition and solid content of sludge. According to the different main components contained in the sludge, the sludge can be divided into organic sludge and inorganic sludge. Generally speaking, cationic flocculants are used to treat organic sludge, and anionic flocculants are used to treat inorganic sludge. Cationic flocculants are not easy to use when the alkalinity is strong, and anionic flocculants should not be used when the acidity is strong. When the solid content of the sludge is high, the amount of flocculants is usually large.
Ion degree selection of flocculant: For the sludge to be dehydrated, flocculants of different ion degrees can be used to screen through small experiments to select the ideal and suitable flocculant, so that the ideal flocculant effect can be obtained, and the dosage can be reduced and costs can be saved.
The key to choosing ionicity is: the size of the flocculation; the strength of the flocculation and the moisture content.
The size of the flocculation: The flocculation is too small to affect the drainage speed, and the flocculation is too large to bind more water and reduce the mudiness. The size of the flocculant can be adjusted by selecting the molecular weight of the flocculant.
The strength of the flocculation: The flocculation should remain stable without breaking under the action of shear. Increasing the molecular weight of the flocculant or selecting a suitable molecular structure helps to improve the stability of the flocculant.
Mixing of flocculant and sludge: The flocculant must fully react with the sludge at a certain location in the dewatering equipment to cause flocculation. For this reason, the viscosity of the flocculant solution must be appropriate, and it can be fully mixed with the sludge under the existing equipment conditions. Whether the two are evenly mixed is a key factor for success. The viscosity of the flocculant solution is related to its molecular weight and formulation concentration.
Dissolution of flocculant: Only when it is dissolved well can the flocculant effect be fully utilized. Sometimes it is necessary to speed up the dissolution rate. At this time, you can consider increasing the concentration of the flocculant solution.
