PROBLEM TO BE SOLVED: To provide a water treatment unit for artificial dialysis and a water treatment device for artificial dialysis capable of flowing concentrated water at a low flow rate, performing a filtration operation at a high pressure and a high recovery rate, and improving the recovery rate of raw water as compared with the conventional case. .. SOLUTION: This water treatment unit for artificial dialysis is provided after a reverse osmosis membrane filter 11 and has a filter structure in which a plurality of disc-shaped reverse osmosis membranes are stacked, and concentrated water of the reverse osmosis membrane filter is provided. The input disc type reverse osmosis membrane module 19, the pressure regulating valve 20 provided on the drainage channel and capable of adjusting the filtration pressure of the disc type reverse osmosis membrane module, and the permeated water of the disc type reverse osmosis membrane module. A water quality meter 23 provided on the output side for measuring the electrical conductivity of permeated water, switching valves 41 and 42 for switching the piping route for returning the permeated water of the disk-type reverse osmosis membrane module to one of the previous treatments, and the above. A control unit 45 that controls the switching operation of the switching valve based on the result of the electrical conductivity by the water quality meter is provided. [Selection diagram] Fig. 1【課題】濃縮水を低流量で流し、且つ高圧、高回収率での濾過運転を行い、従来よりも原水回収率を向上させることのできる人工透析用水処理ユニット及び人工透析用水処理装置を提供する。【解決手段】この人工透析用水処理ユニットは、逆浸透膜フィルタ１１の後段に設けられ、円板状の逆浸透膜を複数段重ねたフィルタ構造を有すると共に、前記逆浸透膜フィルタの濃縮水が入力されるディスク型逆浸透膜モジュール１９と、その排水路上に設けられ、該ディスク型逆浸透膜モジュールの濾過圧力を調整可能な調圧バルブ２０と、前記ディスク型逆浸透膜モジュールの透過水の出力側に設けられ、透過水の電気伝導率を計測する水質計２３と、前記ディスク型逆浸透膜モジュールの透過水を前段処理のいずれかに戻す配管経路を切り替える切替バルブ４１、４２と、前記水質計による電気伝導率の結果に基づき前記切替バルブの切替動作を制御する制御部４５と、を備える。【選択図】図１
