advanced wastwater treatment system using a submerged type membrane

摘要

PURPOSE: Provided is a submerged membrane separation system for advanced water treatment, which can remove nitrogen and phosphorous as well as suspended solids and organic materials with high efficiency. CONSTITUTION: The system comprises a grit chamber(1), a screen tank(2), an equalization basin(3), a microfilter screen(13), an anoxic zone(5), a membrane separation aerobic zone(6) a treated water tank(7), a stabilization tank(4) for receiving residue being comprised of nitrite and sludge generated from the membrane separation aerobic zone(6) by a return pump(19) submerged in the membrane separation aerobic zone(6) and supplying excessive residue to the anoxic zone(5) in natural when amount of the supplied residue is larger than a predetermined amount, a sludge thickener(8) for receiving sludge by the return pump(19) submerged in the membrane separation aerobic zone(6), a blower(16) for supplying air to a diffuser installed in the membrane separation aerobic zone(5), the sludge thickener(8) and the treated water tank(7), respectively by an air pipe line (A), and a chemical tank(17) for storing coagulant which coagulates phosphorous compounds and feeding the coagulant to the membrane separation aerobic zone(6) by a transportation pump(18).