Sludge Dewatering Fabrics mainly is used for sludge dewatering in sewage treatment factories.They have the characteristics of good water permeability,air permeability and non-revealed sludge, acid-resisting,alkali-resisting,heat resistance (180).Because of their designing structure,the sludge can be peel off easily after pigeonhole filter,so the screen are easily cleaned and have a long working time.Therefore they are designed specially for sludge dewatering.