Sludge treatment technology sharing: concentration and dehydration
The function of sludge concentration is to remove part of the water in the sludge through gravity or mechanical means and reduce the volume; the function of sludge dehydration is to mechanically separate part of the interstitial water in the sludge to further reduce the volume. The moisture content of concentrated sludge can generally reach 94% to 96%. The moisture content of dewatered sludge can generally reach about 80%. The sludge concentration and dehydration process should be comprehensively determined based on factors such as the sewage treatment process used, sludge characteristics, subsequent treatment and disposal methods, environmental requirements, site area, investment and operating costs, etc. Main types and characteristics of concentration processes The methods of sludge concentration are mainly divided into gravity concentration, mechanical concentration and air flotation concentration. At present, gravity concentration and mechanic...