Ali Rostamiiranagh - Expert of sewage studies and technical inspection office
Mohammad Reza Fakhri Heravi - Manager of sewage studies and technical inspection office

The treatment and disposal of sewage sludge is an expensive and environmentally sensitive problem. It is also a growing problem world-wide since sludge production will continue to increase as new sewage treatment works are built and environmental quality standards become more stringent. Dewatering process efficiency, classically assessed by a parameter “dryness limit”, is strongly affected by conditioned sludge properties and by operating conditions.In this review we discussed the dewatering methods and ways for improving of sludge dewatering.

sludge, wastewater, disposal, dewatering, sewage