Sediment/sludge removal from the water supply system

Sediment/sludge removal from the  water supply system

Please share details of the process/equipment you are using at your plant to reduce the sludge or sediments from community water supply.   I work at Newport News Waterworks, Virginia. Recently I have been given a task to design or purchase equipment to remove sludge accumulating in our water treatment basins. The water treatment basin is 7-8 ft. (~2.5 m) deep and we are currently using the Dissolved Air Flotation (DAF) process.