| abstract |
Mixing with two or more storage tanks 2, 3 for storing two or more powdered polymer flocculents independently, a feed amount adjustable feeders 4, 5 connected to the storage tanks 2, 3, and a feed pump The powdery polymer flocculant stored in the storage tanks 2 and 3 is supplied to the mixing tank 6 through the feeders 4 and 5 by using the continuous dissolution supply apparatus provided with the tank 6 and the filtration member 8. The mixture is mixed with water in the mixing tank 6 to prepare a dispersion, the dispersion is passed through the filtration member 8 to prepare a flocculant aqueous solution, and the flocculant aqueous solution is added to the sludge or wastewater. |