• Company news

current location：home>>News>>Company news

Method of Sludge Treatment with Belt Filter Press

Belt filter press after digestion and digestion, the water content is still above 94%, the volume is large, should be further processed. The sludge dewatering process of the belt filter press is used for further dewatering of the concentrated sludge to reduce the volume, facilitate transport and follow-up. The sludge dewatering of the belt filter press is mainly the adsorption of water and capillary water in the sludge, which generally reduces the sludge water content from about 96% to about 60% -85%, and the sludge volume is reduced to the original 1 / 5 to 1/10, greatly reducing the difficulty of subsequent sludge disposal.
Baking filter with air filter: In addition to a small amount of large-scale suspended matter, the sewage treatment plant to produce sludge in the solid material is mainly horny particles, and its affinity with water is very strong, if not for the appropriate pretreatment, Dehydration will be very difficult. Pretreatment of sludge before dehydration, so that the sludge particles to change the nature of the material, destroying the colloidal structure of the sludge to reduce its affinity with water, thereby improving the belt filter press dehydration performance, the process of sludge conditioning Active temperament.
There are many methods of sludge conditioning, such as dosing, washing, heating, freezing and so on. Which dosing method of economic and practical, simple and convenient, the most widely used. Dosing method is to add chemical agents to the sludge to change the nature of the sludge, the chemical reaction on the surface of the colloidal particles to neutralize the charge of the colloidal particles, so that the sludge particles condensed into large Particle floc, while the water from the sludge particles separated, thus improving the belt filter press sludge dewatering performance.
Dosing Regulation In addition to considering the nature of the sludge and the type of conditioner, the temperature of the sludge, the pH, the concentration of the conditioner and the dosage sequence of the various conditioning agents will affect the conditioning effect. In addition to adding sludge conditioning agent, it is sometimes necessary to add coagulant to adjust the pH value of the sludge, change the particle structure of the sludge, destroy the stability of the colloid, enhance the floc strength or provide the aggregated skeleton for the sludge, Commonly used coagulants are diatomaceous earth, pearlite, lime, fly ash, shell powder and so on.

How to choose the filter cloth of the belt filter?
What is the effect of the filter cloth of the belt filter press?