What is the purpose of sludge conditioning? What are the main methods.

     The purpose of sludge conditioning is to pretreat sludge to improve the efficiency of sludge thickening and dewatering, and to improve the sludge properties in a planned way for economic follow-up treatment. Organic sludge (including primary sludge, humic sludge, activated sludge and digestion sludge) is a suspension with organic particles as the main body. The particle size is uneven and very small, with colloidal characteristics, large compressibility, and large filtration specific impedance value, so the filtration and dehydration performance is poor. Generally speaking, the specific impedance value of sludge for mechanical dehydration is (0.1-0.4) × 109s2 / g, which is more economical, but the specific impedance values of various sludge are greater than this value. Therefore, in order to improve the filtration and dehydration performance of sludge, it is necessary to adjust.

       Sludge conditioning methods include washing, dosing (chemical regulation), heat treatment and freeze-thaw. In recent years, polymer coagulants have been widely used. In order not to decompose the effective components, it is beneficial to use freeze-thaw to reuse sludge as fertilizer. When the waste heat of LPG is available, the method of freeze-thaw is more advantageous. When selecting the sludge conditioning process, it must be determined from the aspects of sludge properties, dehydration process, whether there is waste heat available and the relationship with the whole treatment and disposal system.

       Doyen specializes in providing belt press equipment for the Southeast Asian market. Welcome to visit our workshop, according to the actual situation of your company, develop a more scientific dehydration program.Welcome to joyce@doyenchina.com or visit https://www.doyenchina.com.