| 摘要 |
<p>PURPOSE:To reduce power as a whole and to apply uniform circulating flow to the entire surface of the membrane of a filter module by setting the constitution ratio of the arranging number of first membrane separators equipped with air diffusion pipes and the arranging number of second membrane separators equipped with stirring blades corresponding to the properties of water to be treated. CONSTITUTION:A first membrane separator 23 having filter membrane modules provided to the upper part thereof and having an air diffusion pipe 28 injecting air provided to the lower part thereof and a second membrane separator 24 having filter membrane modules 25b provided to the upper part thereof and having a rotationally driven stirring blade 30 provided to the lower part thereof are provided in a reaction tank 22 in which water to be treated is stagnated and the constitution ratio of the arranging numbers of the first and second membrane separators 23,24 is set corresponding to the properties of water to be treated. When it is estimated that the properties of water to be treated require a long treatment under time aerobic environment, the corresponding ratio of the first membrane separator is increased and, when it is estimated that a long treatment time is required under anaerobic environment, the constitution ratio of the second membrane separator 24 is increased.</p> |
