FILTER FOR WATER CONTAINING MANGANESE DIOXIDE AND DISSOLVED MANGANESE DUE TO PERMEABLE MEMBRANE

摘要

PURPOSE: To remove manganese along with the turbid component and bacteria in raw water by injecting a chlorinated oxidizing agent into the raw water contg. dissolved manganese, introducing the raw water into a reaction tank in which manganese dioxide is present to oxidize and precipitate the dissolved manganese and removing the manganese with a permeable membrane such as a micro-filter membrane and an ultrafilter membrane. ;CONSTITUTION: An appropriate amt. of sodium hypochlorite is injected by an injector 3 into the raw water flowing in a pipeline 1, the raw water is introduced into a reaction tank 4 and agitated by an agitator 5, and hence manganese is oxidized and precipitated with a manganese dioxide powder or the oxidized and precipitated manganese dioxide as the catalyst. The treated water is then introduced from a water collecting trough 6 into a primary treated water tank 7 which is used also for the circulating water tank of an ultrafilter membrane 9 and then sent to the ultrafilter membrane 9 under pressure through a pump 8. A part of the treated water is permeated through the membrane and discharged from a water pipe 10 as purified water, and the remainder is returned to the primary treated water tank 7 and circulated as the circulating water.;COPYRIGHT: (C)1996,JPO