Summary of various sludge dehydrators
Usually sewage treatment plants use a two-step process of sludge concentration and sludge dehydration to reduce sludge volume and volume. For sludge with a moisture content greater than 98%, concentration should generally be considered to reduce the moisture content to about 96% to reduce the sludge volume and facilitate subsequent treatment. Sludge concentration mainly increases the solid content of the sludge through the gravity concentration tank. However, through the concentration tank, the volume is proportional to the concentration time, and the sludge is left to stand and concentrate for a long time, and the organic matter in it is easy to decay under the action of microorganisms. It smells bad and affects the sanitary environment of the sewage treatment plant. Therefore, generally after the moisture content is reduced to 94-96% through gravity concentration, a mechanical dehydration process with higher dehydration efficiency is needed to further process the s...