WATER TREATMENT SYSTEM

• Main Authors: MURANAKA TAKASHI, MORI YUKI
• Format: Patent
• Language: English; Japanese
• Published: 09.06.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a water treatment system capable of suppressing proliferation of microorganisms in a reverse osmosis membrane device.SOLUTION: There is provided a water treatment system 1 which comprises: a reverse osmosis membrane device 10 which has a reverse osmosis membrane and separates feed water into treated water and concentrated water; a feed water line 20 for supplying the feed water to the reverse osmosis membrane device 10; a security filter 23 installed in the feed water line 20; an ultraviolet sterilization device 22 which is installed on an upstream side from the security filter 23 in the feed water line 20 and has an ultraviolet light source which radiates ultraviolet light to the feed water; a biofouling index detection section 54 which detects a biofouling index indicating an ease of occurrence of biofouling; and a radiation control unit 55 for turning on the ultraviolet light source to the ultraviolet sterilization device 22 according to the detected value of the biofouling index detection section 54.SELECTED DRAWING: Figure 1 【課題】逆浸透膜装置における微生物の繁殖を抑制できる水処理システムを提供すること。【解決手段】本発明の一態様に係る水処理システム１は、逆浸透膜を有し、供給水を処理水と濃縮水とに分離する逆浸透膜装置１０と、前記逆浸透膜装置１０に前記供給水を供給する給水ライン２０と、前記給水ライン２０に設けられる保安フィルタ２３と、前記給水ライン２０の前記保安フィルタ２３よりも上流側に設けられ、前記供給水に紫外線を照射する紫外光源を有する紫外線殺菌装置２２と、バイオファウリングの発生し易さを示すバイオファウリング指標を検出するバイオファウリング指標検出部５４と、前記バイオファウリング指標検出部５４の検出値に応じて前記紫外線殺菌装置２２に前記紫外光源を点灯させる照射制御部５５と、を備える。【選択図】図１