| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for strengthening cleaning power to a membrane surface, reducing clogging of a membrane and obtaining stable filtering capacity for a long period of time in a membrane separation method using an inner pressure-type tubular membrane.SOLUTION: A water treatment method includes a step of supplying raw water and gas to the inner pressure-type tubular membrane to clean the membrane surface of the tubular membrane and to perform solid-liquid separation of the raw water and treatment water, wherein the gas ratio of the raw water and gas supplied to the tubular membrane is ≥0.4. |
