System for treatment of water or wastewater, and method using such system

Application Number: 00109280
Application Date: 2000.06.20
Publication Number: 1277942
Publication Date: 2000.12.27
Priority Information: 1999/6/21 KR 23222/1999
International: C02F1/52;C02F3/30;C02F3/34
Applicant(s) Name: Sahan Industries Co., Ltd.
Inventor(s) Name: Pyon Kyoo-Kim;Li Song-Yu;Whang Young-Woo
Patent Agency Code: 11219
Patent Agent: ding yebeng
Abstract A water purification system and water purification method using the same are provided, which are characterized in that there is no need to extra hydrogen donor during denitrification so that internal MLSS recycling can be excluded. The water purification system includes a flash mixing tank(304) in which a flocculant(305) is dosed into raw water; a slow flocculation tank(308) in which an anionic polymer(307) is injected to the influent from the flash mixing tank; a high rate settling tank(309) in which suspended solids in the influent from the slow flocculation tank settle down; a primary biological reactor in which hydrophilic media are packed therein, microorganisms related to nitrification are attached on the surface of the hydrophilic media and effluent from the high rate settling tank is introduced therein; and a secondary biological reactor in which granular sulfur media are packed therein, microorganisms related to autotrophic sulfur denitrification are attached on the surface of the granular sulfur media and effluent from the primary biological reactor is introduced therein.