WATER TREATMENT SYSTEM

To provide a water treatment system capable of easily balancing therein the content of sodium hypochlorite contained in feed water for biofilm suppression and the content of a stabilizer contained in feed water to prevent deterioration of a reverse osmosis membrane.SOLUTION: A water treatment system...

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Hauptverfasser: MATSUTOMO SHINJI, IWAMOTO KENSUKE
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a water treatment system capable of easily balancing therein the content of sodium hypochlorite contained in feed water for biofilm suppression and the content of a stabilizer contained in feed water to prevent deterioration of a reverse osmosis membrane.SOLUTION: A water treatment system 1 comprises a filtration device 3 for filtering raw water W10 to produce feed water W21, a raw water line L1 for supplying the raw water W10 to the filtration device 3, a reverse osmosis membrane module 14 for separating feed water W22 produced by the filtration device 3 into permeated water W30 and concentrated water W40, a first chemical feeder 4 for injecting a stabilizer into the feed water W21, and a chemical injection control part 30 for adjusting the balance of the molar ratio of a chlorine-based oxidant and the stabilizer in the feed water W21 by adjusting the injection amount of the stabilizer.SELECTED DRAWING: Figure 1 【課題】水処理システム内で、バイオフィルム抑制のため給水中に含まれる次亜塩素酸ナトリウムの含有量と、逆浸透膜の劣化を防止するため給水中に含まれる安定化剤の含有量とのバランスを、簡便に取ることが可能な水処理システムを提供する。【解決手段】水処理システム1は、原水W10をろ過して給水W21を生成するろ過装置3と、原水W10をろ過装置3に供給する原水ラインL1と、ろ過装置3で生成された給水W22を透過水W30と濃縮水W40とに分離する逆浸透膜モジュール14と、給水W21に安定化剤を薬注する第1薬注装置4と、安定化剤の薬注量を調整することにより、給水W21内の塩素系酸化剤と安定化剤のモル比のバランスを調整する薬注制御部30と、を備える。【選択図】図1