MONITORING METHOD AND MONITORING DEVICE OF SLIME ADHESION STATE IN WATER SYSTEM

• Main Authors: YAGI MINORU, MORITA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 13.11.2014
• Subjects: CHEMISTRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; TESTING; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To provide a monitoring method and monitoring device of slime adhesion state in a water system that can accurately obtain the continuous variation of the slime adhesion state in real time without being affected by a factor other than the slime, such as an underwater SS component.SOLUTION: Water (raw water) extracted from a water system is made to flow through a hollow fiber membrane by a crossflow method, and the slime adhesion state is monitored on the basis of the variation in differential pressure between the raw water inflow side and the permeated water outflow side of the hollow fiber membrane. By making the water extracted from a target water system flow through a hollow fiber membrane module by the crossflow method, the slime adhesion state can be continuously obtained in a relatively short time on the basis of the pressure change between the front and back of the membrane due to the slime adhering to the surface of the hollow fiber membrane. Furthermore, as in a total amount filtration method, this method is hardly been affected by a factor other than the slime, such as an underwater SS component. 【課題】水中のＳＳ成分などのスライム以外の因子の影響を受けることなく、スライム付着状況の連続的な変化をリアルタイムで正確に把握することができる水系のスライム付着状況のモニタリング方法及びモニタリング装置を提供する。【解決手段】水系から採水した水（原水）を、中空糸膜にクロスフロー方式で通水し、該中空糸膜の原水流入側と透過水流出側との差圧の変化からスライムの付着状況をモニタリングする。対象水系から採水した水を、中空糸膜モジュールにクロスフロー方式で通水することにより、中空糸膜表面に付着するスライムによる膜前後の圧力変化から、比較的短時間で、連続的にスライム付着状況を把握することができ、しかも全量濾過方式のように、水中のＳＳ成分などのスライム以外の因子の影響も受け難い。【選択図】図１