| 摘要 |
<p>PROBLEM TO BE SOLVED: To minimize the financial load on each household to modify a single septic tank into a combined septic tank by which all the domestic waste water as well as night soil is purified to a high degree, to provide a hollow-fiber membrane module as an efficient separation membrane module, to propose a method for combining the single septic tank using a separation membrane module and to furnish its use. SOLUTION: Both ends of circumferentially arranged plural hollow-fiber membrane 2 are collected and fixed by an upper annular fixing member 3 and a lower annular fixing member 5, a filtrate passage 4 communicating with the open end of each hollow-fiber membrane and a filtrate outlet 15 are provided to the upper annular fixing member, an inlet 16 for sending air from the outside and an air passage 6 having plural air diffuser holes 7 are furnished to the lower annular fixing member in which the close end of each membrane is fixed, the upper annular fixing member is floatably mounted at the upper part between a coaxially set outer cylinder 8 and inner cylinder 9 by an upper positioning member 11, and the lower annular fixing member is floatably mounted at the lower part of a lower positioning member.</p> |
