摘要:
Using a continuous dissolving and feeding device equipped with two or more storage tanks for storing two or more kinds of powdery polymer coagulants individually feeders which are able to control feed rate, connected to the storage tanks, a mixing tank equipped with a feed water pump, and a filtering member, the powdery polymer coagulants stored in the storage tanks are fed to the mixing tank via the feeders; a dispersing solution is prepared by mixing the powdery polymer coagulants with water in the mixing tank; the dispersing solution is passed through the filtering member to prepare an aqueous coagulant solution; and the aqueous coagulant solution is added to sludge or waste water.
摘要:
A method of treating sludge or wastewater involving the following steps: a swelling step which prepares a swelling liquid by adding a powdery polymer flocculant to water; a dissolution step which obtains an aqueous flocculant solution by supplying the swelling liquid to a filtration component and passing a filtering area of the filtration component; a flocculation treatment step which adds the aqueous flocculant solution to sludge or wastewater, wherein the total processing time from the time point where the powdery polymer flocculant was added to water until just before adding to sludge or wastewater to the aqueous flocculant solution is less than 3 hours.